/* roulang page: index */
:root {
  --bg: #07121f;
  --bg-2: #0b1b2c;
  --bg-3: #0e2032;
  --primary: #18bfcb;
  --primary-deep: #21a8e0;
  --accent: #ffb443;
  --text: #eaf3fa;
  --text-weak: #9fb2c4;
  --border: rgba(190, 226, 255, 0.14);
  --glass: rgba(18, 37, 56, 0.58);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --header-h: 76px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  background: var(--bg);
}
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: var(--primary);
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
.grid-container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}
.section {
  padding: 84px 0;
}
.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 14px;
}
.section-head p,
.section-head .desc {
  color: var(--text-weak);
  font-size: 17px;
  margin-bottom: 0;
}
.text-primary {
  color: var(--primary);
}
.text-accent {
  color: var(--accent);
}
.text-weak {
  color: var(--text-weak);
}
.mt-20 {
  margin-top: 20px;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  padding: 12px 24px;
  font-size: 15px;
  margin-bottom: 0;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, border 0.25s ease, color 0.25s ease;
  cursor: pointer;
  text-align: center;
}
.button:focus,
.button:active {
  outline: none;
  box-shadow: 0 0 0 3px rgba(24, 191, 203, 0.25);
}
.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #06111c;
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 30px rgba(24, 191, 203, 0.22);
}
.button.primary:hover {
  background: linear-gradient(135deg, #33d6df, #2da9e8);
  color: #06111c;
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(24, 191, 203, 0.28);
}
.button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(190, 226, 255, 0.28);
}
.button.secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(24, 191, 203, 0.06);
  transform: translateY(-3px);
}
.button.accent-c {
  background: var(--accent);
  color: #0a1e2b;
  border: 1px solid rgba(255, 180, 67, 0.1);
}
.button.accent-c:hover {
  background: #ffc25e;
  color: #0a1e2b;
  transform: translateY(-3px);
}
.btn-sm {
  padding: 10px 18px;
  font-size: 14px;
}

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  height: var(--header-h);
  background: rgba(7, 18, 31, 0.68);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(7, 18, 31, 0.96);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand-col {
  min-width: 0;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(140deg, #0d3348, #155e6d);
  border: 1px solid rgba(190, 226, 255, 0.18);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
  color: var(--primary);
  box-shadow: inset 0 0 28px rgba(24, 191, 203, 0.14), 0 6px 18px rgba(0, 0, 0, 0.18);
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text);
}
.brand-text span {
  color: var(--primary);
}
.main-nav-wrap {
  flex: 1;
  min-width: 0;
}
.main-nav {
  display: flex;
  justify-content: center;
  gap: 32px;
  list-style: none;
  white-space: nowrap;
}
.main-nav > li > a {
  color: rgba(234, 243, 250, 0.82);
  font-weight: 500;
  font-size: 15px;
  padding: 8px 2px;
  display: inline-block;
  position: relative;
  transition: color 0.2s ease;
}
.main-nav > li > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-deep));
  transition: width 0.25s ease;
}
.main-nav > li > a:hover,
.main-nav > li > a.active {
  color: var(--text);
}
.main-nav > li > a.active {
  font-weight: 700;
}
.main-nav > li > a.active::after,
.main-nav > li > a:hover::after {
  width: 100%;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
.header-search {
  position: relative;
  display: flex;
  align-items: center;
}
.header-search input {
  width: 148px;
  height: 38px;
  border-radius: 999px;
  background: rgba(14, 32, 50, 0.9);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0 38px 0 16px;
  font-size: 14px;
  transition: width 0.3s ease, border 0.3s ease;
  margin: 0;
}
.header-search input::placeholder {
  color: var(--text-weak);
}
.header-search input:focus {
  outline: none;
  width: 190px;
  border-color: rgba(24, 191, 203, 0.5);
}
.header-search button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--text-weak);
  font-size: 16px;
  cursor: pointer;
  line-height: 1;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  transition: color 0.2s ease, background 0.2s ease;
}
.header-search button:hover {
  color: var(--primary);
}
.login-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
}
.login-btn:hover {
  border-color: rgba(24, 191, 203, 0.45);
  color: var(--primary);
}
.header-cta {
  padding: 9px 20px;
  font-size: 14px;
  border-radius: 999px;
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
}
.menu-toggle:hover {
  color: var(--primary);
}

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 0 80px;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(7, 18, 31, 0.96) 0%, rgba(7, 18, 31, 0.78) 46%, rgba(10, 24, 37, 0.52) 100%),
    radial-gradient(circle at 30% 30%, rgba(24, 191, 203, 0.08) 0%, transparent 50%);
  z-index: 1;
}
.hero::after {
  content: "";
  position: absolute;
  right: -100px;
  top: -80px;
  width: 480px;
  height: 480px;
  background: rgba(24, 191, 203, 0.1);
  filter: blur(120px);
  border-radius: 50%;
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 5;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(24, 191, 203, 0.1);
  border: 1px solid rgba(24, 191, 203, 0.28);
  color: var(--primary);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 14px;
  margin-bottom: 22px;
  letter-spacing: 0.8px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 55px);
  letter-spacing: -1px;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: linear-gradient(90deg, #5cdbea, #76c9ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-lead {
  color: #cbd9e6;
  max-width: 660px;
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-btn {
  padding: 15px 32px;
  font-size: 16px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 10px;
}
.hero-trust > div {
  display: flex;
  flex-direction: column;
}
.hero-trust strong {
  font-size: 25px;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}
.hero-trust span {
  font-size: 14px;
  color: #a5b7c7;
  margin-top: 2px;
}

/* Info strip */
.info-strip {
  position: relative;
  z-index: 10;
  margin-top: -26px;
}
.info-strip .strip-card {
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 30px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.info-strip .text-line {
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--text);
}
.info-strip .text-line .fa-regular,
.info-strip .text-line .fa-solid {
  color: var(--accent);
  font-size: 22px;
}
.btn-inline {
  border-radius: 999px;
  background: rgba(255, 180, 67, 0.12);
  border: 1px solid rgba(255, 180, 67, 0.4);
  color: var(--accent);
  padding: 9px 18px;
  display: inline-block;
  font-size: 14px;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn-inline:hover {
  background: rgba(255, 180, 67, 0.22);
  color: #ffd89a;
}

/* Section common cards */
.service-tier-section {
  background:
    radial-gradient(circle at 12% 18%, rgba(24, 191, 203, 0.07), transparent 28%),
    radial-gradient(circle at 83% 15%, rgba(33, 168, 224, 0.06), transparent 28%),
    var(--bg);
}
.section-sub {
  font-size: 16px;
  color: var(--text-weak);
}
.service-card {
  position: relative;
  height: 100%;
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 26px 30px;
  transition: transform 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}
.service-card img {
  width: 100%;
  height: 168px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 22px;
}
.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(24, 191, 203, 0.28);
  box-shadow: var(--shadow);
}
.service-card.featured {
  background: rgba(16, 42, 61, 0.78);
  border-color: rgba(24, 191, 203, 0.42);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
  transform: translateY(-16px);
}
.service-card.featured:hover {
  transform: translateY(-18px);
}
.tier-badge {
  position: absolute;
  top: 24px;
  right: 26px;
  z-index: 2;
  background: var(--accent);
  color: #091822;
  font-size: 13px;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.4px;
}
.tier-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(24, 191, 203, 0.16), rgba(33, 168, 224, 0.08));
  border: 1px solid rgba(24, 191, 203, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 24px;
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 23px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}
.service-card .sub {
  color: var(--text-weak);
  font-size: 15px;
  margin-bottom: 22px;
  line-height: 1.7;
}
.service-feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.service-feature-list li {
  display: flex;
  gap: 10px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}
.service-feature-list li .fa,
.service-feature-list li .fa-solid {
  color: var(--primary);
  margin-top: 5px;
  font-size: 13px;
}
.text-link {
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.text-link .fa-solid {
  transition: transform 0.2s ease;
}
.text-link:hover .fa-solid {
  transform: translateX(4px);
}

/* Compare section */
.compare-section {
  background: var(--bg-2);
  position: relative;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.compare-card {
  background: rgba(18, 37, 56, 0.62);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 32px 32px 30px;
  transition: transform 0.3s ease, border 0.3s ease;
}
.compare-card.row-b {
  border-color: rgba(24, 191, 203, 0.32);
}
.compare-card:hover {
  transform: translateY(-5px);
  border-color: rgba(24, 191, 203, 0.46);
}
.compare-tag {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 12px;
}
.compare-card h3 {
  font-size: 27px;
  font-weight: 800;
  margin-bottom: 6px;
  color: #fff;
}
.compare-desc {
  color: var(--text-weak);
  font-size: 15px;
  margin-bottom: 28px;
}
.compare-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(190, 226, 255, 0.1);
  font-size: 16px;
}
.compare-item:last-child {
  border-bottom: 0;
}
.compare-val {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 600;
}
.compare-val .ok {
  color: var(--primary);
}
.compare-val .need {
  color: var(--accent);
}
.compare-val .no {
  color: #8599a8;
  text-decoration: line-through;
}
.compare-note {
  margin-top: 34px;
  text-align: center;
  color: var(--text-weak);
  font-size: 14px;
}
.compare-note a {
  color: var(--primary);
}

/* Quick entry / activity */
.activity-section {
  background: var(--bg);
}
.activity-box {
  background:
    radial-gradient(circle at 85% 30%, rgba(24, 191, 203, 0.13), transparent 38%),
    rgba(16, 34, 52, 0.9);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(190, 226, 255, 0.16);
  border-radius: 26px;
  padding: 44px 42px;
  overflow: hidden;
  position: relative;
}
.activity-box::before {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 180, 67, 0.05);
  filter: blur(60px);
  left: 5%;
  bottom: -100px;
}
.activity-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.activity-pill {
  background: rgba(255, 180, 67, 0.14);
  color: var(--accent);
  border: 1px solid rgba(255, 180, 67, 0.24);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}
.activity-pill.sub {
  background: rgba(24, 191, 203, 0.1);
  color: var(--primary);
  border-color: rgba(24, 191, 203, 0.25);
}
.activity-box h2 {
  font-size: clamp(25px, 3.2vw, 35px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.activity-box p {
  color: var(--text-weak);
  font-size: 16px;
  max-width: 740px;
  margin-bottom: 28px;
}
.activity-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* News & CMS Zone */
.news-section {
  background: var(--bg-2);
}
.news-main-card {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 22px;
  overflow: hidden;
  height: 100%;
  min-height: 400px;
  transition: border 0.3s ease, transform 0.3s ease;
}
.news-main-card:hover {
  border-color: rgba(24, 191, 203, 0.42);
  transform: translateY(-6px);
}
.news-main-cover {
  position: relative;
  height: 230px;
  overflow: hidden;
}
.news-main-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-main-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 18, 31, 0) 24%, rgba(7, 18, 31, 0.72) 100%);
}
.news-main-body {
  padding: 20px 24px 26px;
}
.news-cat-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(24, 191, 203, 0.12);
  color: var(--primary);
  font-size: 13px;
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid rgba(24, 191, 203, 0.22);
  margin-bottom: 14px;
}
.news-main-body h3 {
  font-size: 22px;
  line-height: 1.5;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.news-main-body .news-desc {
  color: var(--text-weak);
  font-size: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-weak);
  font-size: 14px;
}
.news-side-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.news-row {
  display: block;
  background: rgba(18, 37, 56, 0.5);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px 22px;
  transition: border 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.news-row:hover {
  background: rgba(18, 37, 56, 0.76);
  border-color: rgba(24, 191, 203, 0.42);
  transform: translateX(6px);
}
.news-row .row-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.news-row .row-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 8px;
}
.news-row .row-desc {
  color: var(--text-weak);
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.news-empty {
  background: rgba(18, 37, 56, 0.45);
  border: 1px dashed rgba(190, 226, 255, 0.22);
  border-radius: 18px;
  padding: 40px 24px;
  text-align: center;
  color: var(--text-weak);
}
.news-empty .fa-solid {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 14px;
  opacity: 0.8;
}
.news-section .more-link {
  display: inline-block;
  margin-top: 42px;
  text-align: center;
  color: var(--primary);
  font-weight: 600;
}

/* Steps / Trust */
.trust-section {
  background:
    linear-gradient(rgba(7, 18, 31, 0.92), rgba(7, 18, 31, 0.94)),
    url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.step-item {
  position: relative;
  background: rgba(18, 37, 56, 0.55);
  border: 1px solid var(--border);
  padding: 32px 24px;
  border-radius: 20px;
  text-align: center;
  min-height: 210px;
}
.step-num {
  width: 42px;
  height: 42px;
  margin: 0 auto 18px;
  background: rgba(24, 191, 203, 0.13);
  border: 1px solid rgba(24, 191, 203, 0.36);
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-item h3 {
  color: #fff;
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}
.step-item p {
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 0;
}
.trust-foot {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 50px;
  margin-top: 44px;
  padding-top: 34px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.trust-foot .number {
  font-size: 30px;
  font-weight: 800;
  color: #fff;
}
.trust-foot .label {
  color: var(--text-weak);
  font-size: 14px;
}

/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-card {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: rgba(18, 37, 56, 0.5);
  border: 1px solid var(--border);
  border-radius: 18px;
  margin-bottom: 16px;
  padding: 5px 24px;
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  list-style: none;
  padding: 20px 0;
  line-height: 1.4;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary .fa {
  color: var(--primary);
  font-size: 16px;
  transition: transform 0.3s ease, color 0.3s ease;
}
.faq-item[open] summary .fa {
  transform: rotate(45deg);
}
.faq-item .answer {
  color: var(--text-weak);
  font-size: 15px;
  padding: 0 0 22px;
  border-top: 1px solid rgba(190, 226, 255, 0.1);
  padding-top: 18px;
}
.faq-list-help {
  text-align: center;
  margin-top: 30px;
  color: var(--text-weak);
}
.faq-list-help a {
  color: var(--primary);
}

/* Contact / CTA */
.contact-section {
  background: var(--bg-2);
  position: relative;
  overflow: hidden;
}
.contact-section::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(24, 191, 203, 0.06);
  filter: blur(90px);
  left: -80px;
  bottom: -100px;
}
.contact-box {
  background: var(--glass);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  z-index: 2;
}
.contact-info {
  height: 100%;
  padding: 44px 34px;
  background: rgba(11, 27, 44, 0.5);
}
.contact-info h2 {
  font-size: 29px;
  font-weight: 800;
  margin-bottom: 16px;
}
.contact-info > p {
  color: var(--text-weak);
  font-size: 15px;
  margin-bottom: 30px;
}
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.contact-list .icon {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  background: rgba(24, 191, 203, 0.1);
  border: 1px solid rgba(24, 191, 203, 0.28);
  border-radius: 14px;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
}
.contact-list strong {
  color: #fff;
  display: block;
  font-size: 17px;
}
.contact-list span {
  color: var(--text-weak);
  font-size: 14px;
  margin-top: 3px;
  display: block;
}
.contact-form-col {
  padding: 44px 40px;
  background: rgba(7, 18, 31, 0.55);
}
.contact-form-col h3 {
  font-size: 22px;
  margin-bottom: 8px;
  font-weight: 700;
  color: #fff;
}
.contact-form-col .form-hint {
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 30px;
}
.contact-form label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}
.contact-form select,
.contact-form input,
.contact-form textarea {
  width: 100%;
  border-radius: 14px;
  background: rgba(14, 32, 50, 0.85);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 16px;
  font-size: 15px;
  margin-bottom: 20px;
  box-shadow: none;
  transition: border 0.25s ease, background 0.25s ease;
  appearance: none;
}
.contact-form select:focus,
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: rgba(24, 191, 203, 0.55);
  background: rgba(14, 32, 50, 0.98);
  box-shadow: 0 0 0 3px rgba(24, 191, 203, 0.08);
}
.contact-form select option {
  background: #0e2032;
  color: var(--text);
}
.contact-form textarea {
  min-height: 100px;
  resize: vertical;
}
.form-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 6px;
}
.form-actions .button {
  border-radius: 14px;
  width: 100%;
}
.form-feedback {
  font-size: 14px;
  min-height: 20px;
  color: var(--text-weak);
}

/* Footer */
.site-footer {
  background: #060e17;
  border-top: 1px solid var(--border);
  padding-top: 70px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1fr;
  gap: 50px;
  padding-bottom: 46px;
}
.footer-about .footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.footer-about .brand-mark {
  width: 40px;
  height: 40px;
  font-size: 18px;
  border-radius: 12px;
}
.footer-about .footer-brand-text {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}
.footer-about p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
}
.footer-title {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 22px;
  letter-spacing: 0.3px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 13px;
}
.footer-links a {
  color: var(--text-weak);
  font-size: 15px;
  transition: color 0.2s ease, padding-left 0.2s ease;
  display: inline-block;
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 5px;
}
.footer-contact-list li {
  display: flex;
  gap: 12px;
  color: var(--text-weak);
  font-size: 15px;
  margin-bottom: 16px;
}
.footer-contact-list .fa-solid,
.footer-contact-list .fa-regular {
  color: var(--primary);
  margin-top: 5px;
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(190, 226, 255, 0.1);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #6a8091;
  font-size: 14px;
}
.footer-bottom a {
  color: #6a8091;
}
.footer-bottom a:hover {
  color: var(--primary);
}

/* Mobile navigation */
.mobile-drawer {
  position: fixed;
  top: var(--header-h);
  right: 0;
  width: min(86vw, 340px);
  background: rgba(9, 23, 36, 0.98);
  backdrop-filter: blur(16px);
  border-left: 1px solid var(--border);
  box-shadow: -20px 0 50px rgba(0, 0, 0, 0.34);
  padding: 30px 26px;
  z-index: 1199;
  transform: translateX(105%);
  transition: transform 0.3s ease;
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mobile-nav a {
  font-size: 17px;
  font-weight: 600;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--primary);
}
.mobile-actions {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

/* Scroll top */
.to-top {
  display: block;
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(24, 191, 203, 0.15);
  border: 1px solid rgba(24, 191, 203, 0.4);
  color: var(--primary);
  font-size: 20px;
  text-align: center;
  line-height: 46px;
  z-index: 900;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: 0.3s ease;
}
.to-top.show {
  opacity: 1;
  visibility: visible;
}
.to-top:hover {
  background: rgba(24, 191, 203, 0.24);
  color: #fff;
}

/* Responsive */
@media screen and (min-width: 64em) {
  .mobile-drawer {
    display: none;
  }
}
@media screen and (max-width: 1024px) {
  .main-nav-wrap {
    display: none;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .header-actions .login-btn {
    display: none;
  }
  .header-actions .header-cta {
    display: none;
  }
  .header-search {
    display: none;
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}
@media screen and (max-width: 768px) {
  :root {
    --header-h: 66px;
  }
  .section {
    padding: 60px 0;
  }
  .grid-container {
    padding-left: 18px;
    padding-right: 18px;
  }
  .header-inner {
    gap: 12px;
  }
  .brand-text {
    font-size: 17px;
  }
  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 17px;
    border-radius: 12px;
  }
  .header-cta,
  .login-btn {
    font-size: 13px;
    padding: 7px 13px;
  }
  .hero {
    min-height: 88vh;
    padding-top: calc(var(--header-h) + 44px);
    padding-bottom: 55px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-lead {
    font-size: 16px;
  }
  .hero-trust {
    gap: 24px;
  }
  .hero-trust strong {
    font-size: 22px;
  }
  .service-card.featured {
    transform: none;
  }
  .service-card.featured:hover {
    transform: translateY(-6px);
  }
  .activity-box {
    padding: 30px 24px;
  }
  .contact-info {
    padding: 34px 26px;
  }
  .contact-form-col {
    padding: 36px 24px;
  }
  .steps-grid {
    grid-template-columns: 1fr 1fr;
  }
  .trust-foot {
    gap: 24px;
  }
  .compare-card {
    padding: 24px 20px;
  }
  .section-head {
    margin-bottom: 36px;
  }
}
@media screen and (max-width: 520px) {
  .hero-actions .button {
    width: 100%;
  }
  .info-strip .strip-card {
    padding: 16px 18px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .compare-grid {
    gap: 20px;
  }
  .news-row {
    padding: 16px;
  }
}
body {
  overflow-x: hidden;
}
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* roulang page: article */
:root {
    --bg: #07121F;
    --bg-deep: #0B1B2C;
    --bg-panel: #0E2032;
    --glass: rgba(18, 37, 56, 0.58);
    --glass-solid: rgba(13, 28, 46, 0.88);
    --line: rgba(190, 226, 255, 0.14);
    --primary: #18BFCB;
    --primary-2: #21A8E0;
    --amber: #FFB443;
    --text: #EAF3FA;
    --muted: #9FB2C4;
    --soft: #C7D8E8;
    --radius: 16px;
    --radius-lg: 20px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 10px 44px rgba(24, 191, 203, 0.24);
    --transition: 0.24s ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background:
        radial-gradient(1100px 520px at 82% -8%, rgba(33, 168, 224, 0.14), transparent 60%),
        radial-gradient(820px 480px at 8% 8%, rgba(24, 191, 203, 0.07), transparent 55%),
        var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    min-height: 100vh;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color .22s ease, border-color .22s ease, background .22s ease, transform .22s ease, opacity .22s ease, box-shadow .22s ease;
}

a:hover,
a:focus {
    color: var(--primary);
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    border: 0;
    background: transparent;
    cursor: pointer;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 0.55em;
    line-height: 1.3;
    letter-spacing: 0.01em;
}

p {
    margin: 0 0 1em;
}

.grid-container {
    max-width: 1240px;
    padding-left: 36px;
    padding-right: 36px;
}

::selection {
    background: rgba(24, 191, 203, 0.3);
    color: #ffffff;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
    border-radius: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 46px;
    padding: 12px 24px;
    min-height: 46px;
    font-weight: 600;
    border: 1px solid transparent;
    white-space: nowrap;
    transition: all .24s ease;
}

.btn i {
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #041019;
    border-color: rgba(255, 255, 255, 0.28);
    box-shadow: 0 8px 28px rgba(24, 191, 203, 0.25);
}

.btn-primary:hover,
.btn-primary:focus {
    color: #040E16;
    background: linear-gradient(135deg, #2AD6E2, #24BAF0);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--line);
    color: var(--text);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.btn-ghost:hover,
.btn-ghost:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(190, 226, 255, 0.28);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
}

.btn-light {
    background: var(--text);
    color: #08141F;
}

.btn-light:hover,
.btn-light:focus {
    color: #081F2C;
    background: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.24);
}

.btn-sm {
    padding: 8px 18px;
    min-height: 38px;
    font-size: 14px;
}

.section-pad {
    padding: 88px 0;
}

.text-muted {
    color: var(--muted);
}

.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(24, 191, 203, 0.12);
    border: 1px solid rgba(24, 191, 203, 0.24);
    border-radius: 30px;
    color: #89F0F0;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 13px;
}

/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(7, 18, 31, 0.76);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}

.site-header::after {
    content: "";
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(24, 191, 203, 0.5), transparent);
    opacity: .5;
    pointer-events: none;
}

.header-bar {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #071B26;
    font-size: 20px;
    background: linear-gradient(135deg, #31DDE8, #26AEE1);
    box-shadow: 0 8px 24px rgba(24, 191, 203, 0.32);
}

.brand-name {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text);
    white-space: nowrap;
}

.brand-highlight {
    color: var(--primary);
    font-weight: 700;
}

.main-nav-wrap {
    display: flex;
    align-items: center;
    margin-left: 8px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 9px 15px;
    border-radius: 40px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(234, 243, 250, 0.82);
    white-space: nowrap;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), transparent);
    opacity: 0;
    transform: scaleX(0.3);
    transition: all .24s ease;
}

.main-nav a:hover,
.main-nav a:focus {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
}

.main-nav a:hover::after,
.main-nav a:focus::after {
    opacity: 1;
    transform: scaleX(1);
}

.main-nav a.active {
    background: rgba(24, 191, 203, 0.13);
    color: var(--primary);
}

.main-nav a.active::after {
    opacity: 1;
    transform: scaleX(1);
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-shrink: 0;
    position: relative;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 40px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--line);
    color: var(--text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all .22s ease;
}

.icon-btn:hover,
.icon-btn:focus {
    color: var(--primary);
    border-color: rgba(24, 191, 203, 0.5);
    background: rgba(24, 191, 203, 0.1);
}

.header-search-panel {
    position: absolute;
    top: calc(100% + 14px);
    right: 0;
    width: 320px;
    background: var(--glass-solid);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 12px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all .24s ease;
    z-index: 30;
}

.header-search-panel.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header-search-panel input {
    width: 100%;
    background: rgba(7, 18, 31, 0.7);
    border: 1px solid rgba(190, 226, 255, 0.18);
    border-radius: 40px;
    padding: 9px 16px;
    outline: none;
    color: var(--text);
}

.header-search-panel input::placeholder {
    color: var(--muted);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 42px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--line);
    color: var(--text);
    align-items: center;
    justify-content: center;
}

.menu-toggle:hover {
    color: var(--primary);
    border-color: rgba(24, 191, 203, 0.5);
}

/* ===== Article Hero ===== */
.article-hero {
    min-height: 300px;
    padding: 64px 0 56px;
    background: linear-gradient(90deg, rgba(6, 15, 26, 0.96), rgba(7, 18, 31, 0.84), rgba(11, 27, 44, 0.55)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    border-bottom: 1px solid var(--line);
    position: relative;
    overflow: hidden;
}

.article-hero::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(24, 191, 203, 0.72), rgba(255, 180, 67, 0.5), transparent);
    opacity: .5;
}

.article-hero .grid-container {
    position: relative;
    z-index: 2;
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 30px;
}

.breadcrumb a {
    color: rgba(234, 243, 250, 0.62);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb i {
    font-size: 12px;
    opacity: .6;
}

.article-heading {
    max-width: 920px;
}

.article-line {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
}

.article-title {
    font-size: clamp(30px, 5vw, 48px);
    font-weight: 750;
    letter-spacing: 0.01em;
    line-height: 1.24;
    color: #F4F9FD;
    margin-bottom: 18px;
    text-wrap: balance;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 26px;
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.article-meta i {
    color: #50D6DE;
    font-size: 13px;
}

.article-abstract {
    background: rgba(9, 24, 38, 0.6);
    border: 1px solid rgba(190, 226, 255, 0.12);
    border-left: 4px solid var(--primary);
    border-radius: 0 18px 18px 0;
    padding: 16px 20px;
    max-width: 780px;
    color: var(--soft);
    line-height: 1.9;
    margin-bottom: 0;
}

/* ===== Body layout ===== */
.article-content-section {
    padding: 68px 0 52px;
}

.prose-panel {
    max-width: 860px;
    margin: 0 auto;
}

.cms-content {
    background: rgba(12, 27, 43, 0.58);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: clamp(28px, 6vw, 58px);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: border-color .3s ease;
}

.cms-content p {
    margin-bottom: 1.45em;
    font-size: 16.5px;
    line-height: 1.95;
    color: #D9E6F0;
}

.cms-content a {
    color: var(--primary);
    border-bottom: 1px solid rgba(24, 191, 203, 0.4);
}

.cms-content a:hover {
    color: #ffffff;
    border-bottom-color: var(--primary);
}

.cms-content h2 {
    font-size: 28px;
    color: #F1FAFF;
    border-left: 4px solid var(--primary);
    padding-left: 15px;
    margin: 1.8em 0 0.7em;
    line-height: 1.4;
}

.cms-content h3 {
    font-size: 21px;
    color: #E2F2FB;
    margin: 1.5em 0 0.55em;
    line-height: 1.5;
}

.cms-content ul,
.cms-content ol {
    margin: 0 0 1.5em;
    padding-left: 1.5em;
    color: #D9E6F0;
}

.cms-content ul {
    list-style: disc;
}

.cms-content ol {
    list-style: decimal;
}

.cms-content li {
    margin-bottom: 8px;
    line-height: 1.9;
}

.cms-content blockquote {
    background: rgba(24, 191, 203, 0.07);
    border-left: 4px solid var(--amber);
    color: var(--soft);
    padding: 18px 22px;
    border-radius: 0 18px 18px 0;
    margin: 1.6em 0;
}

.cms-content figure,
.cms-content img {
    margin: 1.6em 0;
    border-radius: 16px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.38);
}

.cms-content hr {
    border: none;
    height: 1px;
    background: var(--line);
    margin: 2.2em 0;
}

.cms-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.8em 0;
    border-radius: 12px;
    overflow: hidden;
}

.cms-content th,
.cms-content td {
    padding: 11px 14px;
    border: 1px solid var(--line);
    background: rgba(11, 27, 44, 0.56);
    color: var(--soft);
}

.cms-content th {
    background: rgba(24, 191, 203, 0.12);
    color: #EBFFFF;
}

.cms-content code {
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 8px;
    border-radius: 6px;
    color: #BDE9FD;
    font-size: 0.9em;
}

/* ===== Content Not Found ===== */
.notfound-panel {
    text-align: center;
    background: rgba(14, 32, 50, 0.7);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 56px 30px;
    box-shadow: var(--shadow);
}

.notfound-panel .empty-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 24px;
    background: rgba(24, 191, 203, 0.1);
    border: 1px solid rgba(24, 191, 203, 0.25);
    font-size: 30px;
    color: var(--primary);
}

.notfound-panel h1,
.notfound-panel h2 {
    font-size: 28px;
    color: var(--text);
}

.notfound-panel p {
    color: var(--muted);
    max-width: 480px;
    margin: 0 auto 30px;
}

/* ===== Article extra ===== */
.article-extra-section {
    padding: 20px 0 88px;
}

.article-related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto 28px;
}

.article-related-header h2 {
    font-size: 22px;
    margin: 0;
}

.article-related-header a {
    color: var(--primary);
    font-size: 14px;
}

.article-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    max-width: 1200px;
    margin: 0 auto;
}

.related-card {
    position: relative;
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 30px 24px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
    min-height: 180px;
    display: flex;
    flex-direction: column;
}

.related-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(320px 110px at 90% 0%, rgba(24, 191, 203, 0.16), transparent 70%);
    pointer-events: none;
}

.related-card:hover,
.related-card:focus-within {
    transform: translateY(-5px);
    border-color: rgba(24, 191, 203, 0.45);
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.3);
}

.related-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(24, 191, 203, 0.12);
    color: var(--primary);
    font-size: 20px;
    margin-bottom: 18px;
}

.related-card h3 {
    font-size: 19px;
    margin-bottom: 8px;
    color: var(--text);
}

.related-card p {
    color: var(--muted);
    font-size: 14.5px;
    line-height: 1.8;
    margin-bottom: 0;
}

.related-card a {
    position: static;
}

.related-card a::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 20px;
}

/* ===== Article footer CTA ===== */
.news-return-block {
    background: rgba(11, 27, 44, 0.45);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 26px 0;
}

.news-return-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.news-return-inner .return-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ===== Site Footer ===== */
.site-footer {
    background: #040D17;
    border-top: 1px solid var(--line);
    padding: 68px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 0.85fr 1.1fr 1.1fr;
    gap: 44px;
    padding-bottom: 44px;
}

.footer-about {
    max-width: 380px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}

.footer-brand-text {
    font-weight: 700;
    font-size: 19px;
}

.footer-about p {
    color: var(--muted);
    line-height: 1.9;
    font-size: 14.5px;
    margin-bottom: 0;
}

.footer-title {
    font-size: 16px;
    color: var(--text);
    font-weight: 600;
    margin-bottom: 22px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(190, 226, 255, 0.16);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.footer-links a {
    color: var(--muted);
    font-size: 14.5px;
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.footer-links a i {
    font-size: 10px;
    color: rgba(24, 191, 203, 0.65);
    font-weight: 900;
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 2px;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 13px;
    color: var(--muted);
    font-size: 14.5px;
}

.footer-contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact-list i {
    color: var(--primary);
    margin-top: 4px;
    min-width: 18px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(190, 226, 255, 0.1);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    flex-wrap: wrap;
    color: var(--muted);
    font-size: 13.5px;
}

.footer-bottom a {
    color: var(--muted);
    font-size: 13.5px;
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ===== Responsive ===== */
@media screen and (max-width: 1100px) {
    .grid-container {
        padding-left: 26px;
        padding-right: 26px;
    }

    .main-nav a {
        padding: 9px 11px;
        font-size: 14px;
    }

    .header-actions .btn-ghost {
        display: none;
    }
}

@media screen and (max-width: 900px) {
    .menu-toggle {
        display: inline-flex;
    }

    .main-nav-wrap {
        position: absolute;
        top: calc(100% + 12px);
        left: 20px;
        right: 20px;
        background: rgba(8, 20, 32, 0.97);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
        border-radius: 20px;
        padding: 12px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-12px);
        transition: all .24s ease;
        margin: 0;
        align-items: stretch;
    }

    .main-nav-wrap.nav-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }

    .main-nav a {
        justify-content: flex-start;
        width: 100%;
        padding: 12px 16px;
        font-size: 15px;
        border-radius: 14px;
        white-space: normal;
    }

    .main-nav a::after {
        display: none;
    }

    .main-nav a.active {
        background: rgba(24, 191, 203, 0.14);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px 26px;
    }

    .footer-about {
        max-width: 100%;
        grid-column: 1 / -1;
    }
}

@media screen and (max-width: 640px) {
    .grid-container {
        padding-left: 18px;
        padding-right: 18px;
    }

    .header-bar {
        min-height: 70px;
        gap: 8px;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
    }

    .header-actions .btn-primary {
        display: none;
    }

    .header-search-panel {
        width: 260px;
        right: -10px;
    }

    .header-bar .menu-toggle {
        display: inline-flex;
        width: 38px;
        height: 38px;
    }

    .article-hero {
        padding: 42px 0 44px;
        min-height: 240px;
    }

    .article-title {
        font-size: 28px;
    }

    .article-abstract {
        padding: 14px 16px;
        font-size: 14.5px;
    }

    .cms-content {
        padding: 24px 18px;
        border-radius: 16px;
    }

    .cms-content p {
        font-size: 15.5px;
        line-height: 1.9;
    }

    .cms-content h2 {
        font-size: 23px;
    }

    .cms-content h3 {
        font-size: 19px;
    }

    .article-related-grid {
        grid-template-columns: 1fr;
    }

    .article-extra-section {
        padding: 24px 0 56px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media screen and (max-width: 420px) {
    .brand-name {
        font-size: 16px;
    }

    .article-meta {
        gap: 10px;
        font-size: 13px;
    }

    .article-line .btn {
        display: none;
    }
}

/* roulang page: category1 */
:root {
  --bg: #07121f;
  --bg-deep: #04111c;
  --panel: rgba(18, 37, 56, 0.58);
  --panel-solid: #0e2032;
  --line: rgba(190, 226, 255, 0.14);
  --primary: #18bfcb;
  --primary-light: #38dbe3;
  --primary-blue: #21a8e0;
  --accent: #ffb443;
  --text: #eaf3fa;
  --muted: #9fb2c4;
  --radius: 20px;
  --radius-sm: 14px;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.18);
  --space-section: 100px;
  --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

html {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  font-family: var(--font-family);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  display: block;
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% 20%, rgba(33, 168, 224, 0.08), transparent 26%),
    radial-gradient(circle at 85% 10%, rgba(24, 191, 203, 0.08), transparent 24%),
    radial-gradient(circle at 50% 70%, rgba(255, 180, 67, 0.04), transparent 28%),
    linear-gradient(180deg, #07121f 0%, #0a1a2b 50%, #07121f 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(190, 226, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(190, 226, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

img {
  display: inline-block;
  max-width: 100%;
  border: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 3px solid rgba(24, 191, 203, 0.65);
  outline-offset: 3px;
  border-radius: 6px;
}

.grid-container {
  max-width: 1200px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(7, 18, 31, 0.72);
  border-bottom: 1px solid rgba(190, 226, 255, 0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 74px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: #07121f;
  background: linear-gradient(135deg, var(--primary), var(--primary-blue));
  font-size: 18px;
}

.brand-text {
  font-size: 21px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--text);
  letter-spacing: .01em;
}

.brand-text strong {
  font-weight: 700;
  color: var(--primary);
}

.main-nav-wrap {
  margin-left: 8px;
}

.main-nav {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  white-space: nowrap;
}

.main-nav a:hover {
  color: var(--text);
  background: rgba(190, 226, 255, 0.06);
}

.main-nav a.active {
  color: var(--text);
  background: rgba(24, 191, 203, 0.08);
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-blue));
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex-shrink: 0;
}

.search-toggle,
.nav-toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(190, 226, 255, 0.03);
  color: var(--muted);
  cursor: pointer;
}

.search-toggle:hover,
.nav-toggle:hover {
  color: var(--text);
  border-color: rgba(24, 191, 203, 0.5);
  background: rgba(24, 191, 203, 0.06);
}

.nav-toggle {
  display: none;
  font-size: 18px;
}

.partner-link {
  color: var(--muted);
  font-size: 14px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  white-space: nowrap;
}

.partner-link:hover {
  color: var(--text);
  border-color: var(--primary);
}

.btn-primary,
.btn-secondary,
.btn-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
  font-size: 15px;
  line-height: 1;
  padding: 14px 28px;
  transition: all .25s ease;
}

.btn-primary {
  color: #05141d;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-blue) 100%);
  box-shadow: 0 8px 24px rgba(24, 191, 203, 0.24);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(24, 191, 203, 0.34);
  color: #05141d;
}

.btn-primary.small {
  padding: 12px 22px;
  font-size: 14px;
}

.btn-secondary {
  color: var(--text);
  background: rgba(190, 226, 255, 0.05);
  border-color: rgba(190, 226, 255, 0.18);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--text);
  background: rgba(24, 191, 203, 0.08);
  transform: translateY(-2px);
}

/* search overlay */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(4, 17, 28, 0.84);
  backdrop-filter: blur(10px);
}

.search-overlay.is-open {
  display: flex;
}

.search-panel {
  width: 100%;
  max-width: 720px;
  background: rgba(14, 32, 50, 0.95);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  position: relative;
  box-shadow: var(--shadow);
}

.search-panel form {
  display: flex;
  gap: 12px;
}

.search-panel input {
  flex: 1;
  min-width: 0;
  background: rgba(7, 18, 31, 0.62);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  padding: 13px 20px;
  outline: none;
  font-size: 15px;
}

.search-panel input::placeholder {
  color: var(--muted);
}

.search-panel input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(24, 191, 203, 0.12);
}

.search-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  cursor: pointer;
}

.search-close:hover {
  color: var(--text);
  border-color: var(--primary);
}

/* category hero */
.category-hero {
  position: relative;
  padding: 90px 0 96px;
  overflow: hidden;
}

.category-hero .category-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
}

.category-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 18, 31, 0.97) 0%, rgba(7, 18, 31, 0.78) 46%, rgba(7, 18, 31, 0.62) 100%),
    linear-gradient(180deg, rgba(4, 17, 28, 0.22), rgba(7, 18, 31, 0.78));
}

.category-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 850px;
}

.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 42px;
}

.breadcrumb-nav a {
  color: var(--muted);
}

.breadcrumb-nav a:hover {
  color: var(--primary);
}

.breadcrumb-nav .crumb-icon {
  opacity: .7;
  font-size: 12px;
}

.page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(24, 191, 203, 0.28);
  background: rgba(24, 191, 203, 0.07);
  color: var(--primary);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  margin-bottom: 18px;
}

.category-hero h1 {
  font-size: 54px;
  line-height: 1.2;
  margin: 0 0 22px;
  color: #ffffff;
  letter-spacing: .03em;
}

.category-hero .hero-lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 32px;
  line-height: 1.9;
}

.hero-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* section base */
.section-block {
  padding: var(--space-section) 0;
}

.section-block.soft-bg {
  background: rgba(11, 27, 44, 0.52);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 820px;
  margin: 0 auto 52px;
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  background: rgba(24, 191, 203, 0.08);
  border: 1px solid rgba(24, 191, 203, 0.22);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  margin-bottom: 14px;
}

.section-head h2,
.section-title {
  font-size: 34px;
  line-height: 1.3;
  margin: 0 0 14px;
  color: #ffffff;
  font-weight: 600;
}

.section-head .section-lead {
  font-size: 17px;
  color: var(--muted);
  margin: 0;
  line-height: 1.85;
}

/* feature list */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.feature-card {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 56px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(12px);
}

.feature-reverse .feature-copy {
  order: -1;
}

.feature-media {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #0c1d2e;
  aspect-ratio: 16 / 11;
  min-height: 278px;
}

.feature-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.feature-card:hover .feature-media img {
  transform: scale(1.03);
}

.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  pointer-events: none;
  border: 1px solid rgba(190, 226, 255, 0.1);
}

.feature-copy .topic-index {
  display: inline-block;
  font-family: "Arial", sans-serif;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--primary);
  background: rgba(24, 191, 203, 0.08);
  border: 1px solid rgba(24, 191, 203, 0.18);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}

.feature-copy h3 {
  font-size: 25px;
  line-height: 1.35;
  color: #ffffff;
  margin: 0 0 14px;
  font-weight: 600;
}

.feature-copy > p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
}

.feature-points {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--muted);
  line-height: 1.7;
}

.feature-points li i {
  color: var(--primary);
  margin-top: 5px;
  font-size: 13px;
}

.feature-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--primary);
}

.text-link:hover {
  color: var(--text);
}

.hot-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #ffb443;
  background: rgba(255, 180, 67, 0.1);
  border: 1px solid rgba(255, 180, 67, 0.3);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
}

/* plan compare */
.comparison-section {
  padding: var(--space-section) 0;
}

.compare-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.compare-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.compare-card:hover {
  transform: translateY(-6px);
  border-color: rgba(24, 191, 203, 0.38);
  box-shadow: var(--shadow);
}

.compare-card.recommend {
  border-color: rgba(255, 180, 67, 0.38);
  background: rgba(24, 38, 58, 0.72);
}

.compare-card.recommend::before {
  content: "常用选择";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #ffb443, #ff9d3c);
  color: #1a1101;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(255, 180, 67, 0.3);
}

.compare-card-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}

.compare-card-head h3 {
  font-size: 25px;
  margin: 8px 0 6px;
  font-weight: 650;
  color: #ffffff;
}

.compare-card-head .plan-tagline {
  color: var(--muted);
  font-size: 14px;
}

.plan-apply {
  color: var(--primary);
  font-size: 14px;
}

.plan-feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 11px;
  flex: 1;
}

.plan-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 15px;
}

.plan-feature-list li i {
  color: var(--primary);
  font-size: 12px;
  margin-top: 5px;
}

.plan-feature-list li.warning i {
  color: var(--accent);
}

.plan-feature-list li.disabled {
  opacity: .55;
}

.plan-feature-list li.disabled i {
  color: var(--muted);
}

.compare-card-foot {
  padding-top: 6px;
}

/* process */
.process-section {
  padding: var(--space-section) 0;
  background:
    linear-gradient(180deg, rgba(11, 27, 44, 0.4), rgba(7, 18, 31, 0.2)),
    radial-gradient(circle at 80% 20%, rgba(24, 191, 203, 0.06), transparent 32%);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 52px;
}

.process-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  min-height: 210px;
  position: relative;
  transition: transform .3s ease, border-color .3s ease;
  backdrop-filter: blur(10px);
}

.process-item:hover {
  transform: translateY(-4px);
  border-color: rgba(24, 191, 203, 0.3);
}

.process-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-size: 18px;
  margin-bottom: 18px;
  color: var(--bg);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--primary-blue));
  border-radius: 12px;
  font-family: Arial, sans-serif;
}

.process-item h3 {
  font-size: 19px;
  margin: 0 0 8px;
  color: #ffffff;
}

.process-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* cooperation cta */
.cooperation-section {
  padding: var(--space-section) 0 20px;
}

.cooperation-card {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  padding: 62px 54px;
  border: 1px solid var(--line);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
}

.cooperation-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(4, 17, 28, 0.96) 0%, rgba(5, 21, 34, 0.86) 48%, rgba(7, 18, 31, 0.68) 100%),
    radial-gradient(circle at 80% 40%, rgba(24, 191, 203, 0.1), transparent 34%);
}

.cooperation-card-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 34px;
  align-items: center;
}

.cooperation-card h2 {
  font-size: 30px;
  color: #ffffff;
  line-height: 1.35;
  margin: 0 0 12px;
}

.cooperation-card p {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 560px;
}

.cooperation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cooperation-note {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 15px;
  background: rgba(190, 226, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  color: var(--muted);
}

.cooperation-note i {
  color: var(--accent);
  font-size: 20px;
  margin-top: 4px;
}

.cooperation-note strong {
  display: block;
  color: var(--text);
  margin-bottom: 4px;
  font-weight: 600;
}

/* faq */
.faq-section {
  padding: var(--space-section) 0;
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.faq-item[open] {
  border-color: rgba(24, 191, 203, 0.28);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  padding: 20px 24px;
  color: var(--text);
  font-weight: 600;
  font-size: 16px;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary i {
  color: var(--primary);
  font-size: 14px;
  flex-shrink: 0;
  transition: transform .3s ease;
}

.faq-item[open] summary i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 24px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: 0;
}

.faq-answer p {
  margin: 18px 0 0;
  line-height: 1.9;
}

/* footer */
.site-footer {
  background: rgba(4, 17, 28, 0.92);
  border-top: 1px solid var(--line);
  padding: 68px 0 0;
  margin-top: 50px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.9fr 1fr;
  gap: 36px;
  padding-bottom: 46px;
}

.footer-about .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 19px;
}

.footer-brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-blue));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--bg);
  font-size: 17px;
}

.footer-brand-text {
  font-weight: 700;
}

.footer-about p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 330px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #eaf3fa;
  margin: 0 0 18px;
  letter-spacing: .02em;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: var(--muted);
  font-size: 15px;
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.footer-contact-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 15px;
}

.footer-contact-list li i {
  color: var(--primary);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 18px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.footer-bottom a {
  color: var(--muted);
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* responsive */
@media (max-width: 1023.98px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav-wrap {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(7, 18, 31, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 14px 20px 22px;
  }

  .site-header.nav-open .main-nav-wrap {
    display: block;
  }

  .main-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .main-nav a {
    padding: 12px 10px;
    border-radius: 10px;
  }

  .main-nav a.active::after {
    display: none;
  }

  .partner-link {
    display: none;
  }

  .feature-card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 24px;
  }

  .feature-reverse .feature-copy {
    order: 0;
  }

  .compare-card-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .compare-card.recommend {
    transform: none;
  }

  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cooperation-card {
    padding: 42px 30px;
  }

  .cooperation-card-content {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 639.98px) {
  :root {
    --space-section: 72px;
  }

  .header-inner {
    gap: 12px;
  }

  .brand-text {
    font-size: 18px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }

  .header-actions .btn-primary.small {
    display: none;
  }

  .category-hero {
    padding: 60px 0 70px;
  }

  .category-hero h1 {
    font-size: 34px;
  }

  .category-hero .hero-lead {
    font-size: 16px;
  }

  .section-head h2,
  .section-title {
    font-size: 27px;
  }

  .feature-card {
    padding: 18px 16px;
  }

  .feature-media {
    min-height: 200px;
  }

  .feature-copy h3 {
    font-size: 21px;
  }

  .compare-card-grid {
    max-width: 100%;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .cooperation-card {
    padding: 34px 20px;
  }

  .cooperation-card h2 {
    font-size: 24px;
  }

  .cooperation-actions {
    flex-direction: column;
    width: 100%;
  }

  .cooperation-actions .btn-primary,
  .cooperation-actions .btn-secondary {
    width: 100%;
  }

  .faq-item summary {
    padding: 16px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 18px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 359.98px) {
  .header-actions .partner-link {
    display: none;
  }

  .site-brand {
    gap: 6px;
  }
}

/* roulang page: category2 */
:root{
  --bg:#07121F;
  --bg2:#0B1B2C;
  --panel:#0E2032;
  --primary:#18BFCB;
  --primary2:#21A8E0;
  --amber:#FFB443;
  --text:#EAF3FA;
  --muted:#9FB2C4;
  --border:rgba(190,226,255,.14);
  --card:rgba(18,37,56,.58);
  --shadow:0 12px 40px rgba(0,0,0,.25);
  --radius:20px;
  --radius-sm:14px;
  --font:PingFang SC,Microsoft YaHei,system-ui,-apple-system,sans-serif;
  --maxw:1200px;
}
html{scroll-behavior:smooth}
*{box-sizing:border-box}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(circle at 15% 20%, rgba(33,168,224,.08), transparent 28%),
    radial-gradient(circle at 80% 60%, rgba(24,191,203,.05), transparent 25%),
    radial-gradient(circle at 50% 90%, rgba(255,180,67,.04), transparent 22%);
}
body .grid-container, body .container{position:relative;z-index:1}
.grid-container{max-width:var(--maxw);padding-left:24px;padding-right:24px}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:#7BE7EF}
img{display:block;max-width:100%}
button,input,select{font-family:inherit}
ul{margin:0;padding:0;list-style:none}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:all .25s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-cyan{
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  color:#04121A;
  box-shadow:0 0 24px rgba(24,191,203,.25);
}
.btn-cyan:hover{
  background:linear-gradient(135deg,#2ED5E0,#37B7E8);
  color:#04121A;
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(24,191,203,.35);
}
.btn-outline{
  border-color:rgba(190,226,255,.32);
  background:rgba(190,226,255,.04);
  color:var(--text);
}
.btn-outline:hover{
  border-color:rgba(190,226,255,.65);
  background:rgba(190,226,255,.1);
  transform:translateY(-2px);
}
.btn-amber{
  background:var(--amber);
  color:#211500;
  box-shadow:0 0 22px rgba(255,180,67,.18);
}
.btn-amber:hover{
  background:#FFCA6A;
  color:#211500;
  transform:translateY(-2px);
}
.btn-block-mobile{}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:4px}

/* ===== Header 导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(7,18,31,.74);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:background .3s,border-color .3s;
}
.site-header.is-scrolled{
  background:rgba(7,18,31,.96);
  border-bottom-color:rgba(24,191,203,.2);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:76px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  flex-shrink:0;
}
.brand-mark{
  width:40px;
  height:40px;
  border-radius:13px;
  display:grid;
  place-items:center;
  font-size:19px;
  color:#06151F;
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  box-shadow:0 6px 20px rgba(24,191,203,.3);
}
.brand-text{
  font-size:19px;
  font-weight:700;
  letter-spacing:.3px;
  color:var(--text);
  white-space:nowrap;
}
.brand-text span{color:var(--primary)}
.nav-center-wrap{flex:1;display:flex;justify-content:center}
.main-nav-wrap{display:flex;align-items:center}
.main-nav{display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
.main-nav a{
  display:block;
  padding:10px 14px;
  border-radius:999px;
  color:var(--muted);
  font-size:15px;
  font-weight:500;
  line-height:1.3;
}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(24,191,203,.1)}
.main-nav a.active{box-shadow:inset 0 0 0 1px rgba(24,191,203,.18)}
.header-toolbar{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.header-searchbox{
  display:flex;
  align-items:center;
  width:160px;
  height:40px;
  padding:0 12px;
  border:1px solid var(--border);
  border-radius:999px;
  background:rgba(255,255,255,.04);
  transition:width .3s,border-color .3s;
}
.header-searchbox:focus-within{
  width:190px;
  border-color:rgba(24,191,203,.55);
}
.header-searchbox input{
  width:100%;
  border:0;
  outline:0;
  background:transparent;
  color:var(--text);
  font-size:13px;
}
.header-searchbox input::placeholder{color:#768A9B}
.header-searchbox button{
  border:0;
  background:transparent;
  color:var(--muted);
  font-size:13px;
  cursor:pointer;
  padding:4px;
}
.header-searchbox button:hover{color:var(--primary)}
.partner-link{
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  padding:8px 0;
}
.partner-link:hover{color:#fff}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  border-radius:12px;
  color:var(--text);
  font-size:18px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.header-cta .btn{height:42px;padding:0 20px;font-size:14px}

/* ===== Hero 分类首屏 ===== */
.category-hero{
  position:relative;
  padding:84px 0 96px;
  color:#fff;
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--border);
}
.category-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(105deg, rgba(7,18,31,.95) 10%, rgba(10,27,44,.78) 55%, rgba(10,27,44,.62) 100%);
}
.category-hero .grid-container{position:relative;z-index:2}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb i{font-size:11px}
.hero-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:22px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(24,191,203,.12);
  border:1px solid rgba(24,191,203,.25);
  color:#8DE6EC;
  font-size:13px;
  font-weight:500;
}
.hero-pill i{color:var(--amber);font-size:12px}
.category-hero h1{
  font-size:44px;
  line-height:1.28;
  margin:16px 0 16px;
  letter-spacing:.5px;
  font-weight:800;
}
.category-hero h1 .hl{color:var(--primary)}
.hero-lead{
  max-width:720px;
  margin:0;
  font-size:17px;
  line-height:1.9;
  color:#C8D8E6;
}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px}
.scene-quick-tags{
  margin-top:32px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.scene-quick-tags span{
  font-size:13px;
  color:#AFC2D4;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  border-radius:999px;
  padding:4px 12px;
}

/* ===== Section 通用 ===== */
.section{
  padding:96px 0;
  position:relative;
}
.section-head{
  max-width:760px;
  margin-bottom:44px;
}
.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:1.4px;
  color:var(--primary);
  text-transform:uppercase;
  margin-bottom:10px;
}
.section-kicker::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--primary);
  border-radius:2px;
}
.section-title{
  font-size:34px;
  line-height:1.35;
  margin:0 0 14px;
  color:#fff;
  font-weight:800;
}
.section-sub{
  color:var(--muted);
  font-size:16px;
  margin:0;
  line-height:1.85;
}
.title-link{
  margin-top:18px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  font-size:14px;
}

/* ===== 场景能力条 ===== */
.feature-strip{
  background:var(--bg2);
  padding:0;
  border-bottom:1px solid var(--border);
}
.feature-strip .grid-x{gap:0}
.feat-item{
  padding:46px 32px;
  border-left:1px solid var(--border);
}
.feat-item:first-child{border-left:0}
.feat-item .feat-icon{
  width:48px;
  height:48px;
  border-radius:14px;
  background:rgba(24,191,203,.1);
  border:1px solid rgba(24,191,203,.22);
  display:grid;
  place-items:center;
  font-size:19px;
  color:var(--primary);
  margin-bottom:18px;
}
.feat-item h3{
  font-size:17px;
  margin:0 0 8px;
  color:#F3F8FC;
}
.feat-item p{
  font-size:14px;
  color:var(--muted);
  margin:0;
  line-height:1.75;
}

/* ===== 场景图卡 ===== */
.scene-card{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:60px;
  align-items:center;
  padding:56px;
  margin-bottom:28px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:24px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
  transition:border-color .3s,transform .3s;
}
.scene-card.is-reverse{
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
}
.scene-card:hover{
  border-color:rgba(24,191,203,.35);
  transform:translateY(-4px);
}
.scene-media{border-radius:var(--radius);overflow:hidden;position:relative}
.scene-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius);
}
.scene-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  border-radius:var(--radius);
  box-shadow:inset 0 0 40px rgba(0,0,0,.06);
}
.scene-info{padding:4px 0}
.scene-tag{
  display:inline-block;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(24,191,203,.12);
  border:1px solid rgba(24,191,203,.25);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  margin-bottom:16px;
}
.scene-info h3{
  font-size:26px;
  line-height:1.4;
  margin:0 0 12px;
  color:#fff;
}
.scene-info p{
  color:var(--muted);
  line-height:1.9;
  margin-bottom:18px;
}
.dot-list li{
  position:relative;
  padding-left:24px;
  color:#C5D5E2;
  margin-bottom:9px;
  font-size:15px;
  line-height:1.7;
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:11px;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px rgba(24,191,203,.6);
}
.scene-link{
  margin-top:16px;
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-weight:600;
  font-size:14px;
}
.scene-link i{font-size:12px;transition:transform .2s}
.scene-link:hover i{transform:translateX(4px)}

/* ===== 适用流程 ===== */
.process-section{
  background:rgba(11,27,44,.55);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.process-card{
  height:100%;
  padding:30px 24px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:transform .3s,border-color .3s,background .3s;
  margin-bottom:20px;
}
.process-card:hover{
  transform:translateY(-5px);
  background:rgba(24,191,203,.06);
  border-color:rgba(24,191,203,.3);
}
.process-num{
  font-size:30px;
  font-weight:800;
  letter-spacing:1px;
  color:rgba(24,191,203,.28);
  line-height:1;
  margin-bottom:18px;
  font-family:Arial,DIN Alternate,Roboto,sans-serif;
}
.process-card h3{
  font-size:18px;
  color:#fff;
  margin-bottom:8px;
}
.process-card p{
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
  margin-bottom:0;
}

/* ===== CTA 区块 ===== */
.cta-panel{
  border-radius:28px;
  background:linear-gradient(135deg, rgba(24,191,203,.16), rgba(33,168,224,.1)), linear-gradient(140deg, rgba(18,37,56,.9), rgba(11,27,44,.95));
  border:1px solid rgba(24,191,203,.26);
  padding:52px 56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  box-shadow:0 24px 60px rgba(0,0,0,.25);
}
.cta-copy{flex:1;min-width:280px}
.cta-copy h2{
  margin:0 0 12px;
  font-size:30px;
  line-height:1.4;
  color:#fff;
}
.cta-copy p{
  margin:0;
  color:#C7D8E6;
  font-size:15px;
  max-width:620px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ===== FAQ ===== */
.faq-section{background:var(--bg)}
.faq-wrap{
  max-width:860px;
  margin:0 auto;
}
.accordion{
  background:transparent;
  border:0;
  margin:0;
}
.accordion-item{
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  border-radius:var(--radius-sm);
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:none;
}
.accordion-item.is-active{
  border-color:rgba(24,191,203,.3);
  background:rgba(24,191,203,.04);
}
.accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  width:100%;
  padding:20px 22px;
  color:#DCE9F2;
  font-size:16px;
  font-weight:600;
  background:transparent;
  border:0;
}
.accordion-title::before,.accordion-title::after{display:none}
.accordion-title:hover{background:rgba(24,191,203,.08)}
.accordion-title i{
  font-size:13px;
  color:var(--primary);
  margin-left:12px;
  transition:transform .2s;
}
.accordion-item.is-active > .accordion-title i{
  transform:rotate(180deg);
}
.accordion-content{
  border-top:1px solid rgba(190,226,255,.08);
  background:rgba(255,255,255,.015);
  color:var(--muted);
  padding:4px 22px;
  line-height:1.85;
  font-size:15px;
}

/* ===== Footer ===== */
.site-footer{
  background:#060F19;
  border-top:1px solid var(--border);
  padding:64px 0 0;
  position:relative;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.2fr 1.3fr;
  gap:44px;
  padding-bottom:36px;
}
.footer-about .footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:18px;
  font-weight:700;
}
.footer-about p{
  color:var(--muted);
  font-size:14px;
  line-height:1.9;
  margin:16px 0 0;
  max-width:360px;
}
.footer-title{
  font-size:16px;
  color:#fff;
  margin:4px 0 18px;
  font-weight:600;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-links a{
  color:var(--muted);
  font-size:14px;
}
.footer-links a:hover{color:var(--primary)}
.footer-contact-list li{
  color:var(--muted);
  font-size:14px;
  display:flex;
  gap:10px;
  align-items:center;
  margin-bottom:12px;
}
.footer-contact-list i{
  color:var(--primary);
  width:18px;
  text-align:center;
}
.footer-bottom{
  border-top:1px solid rgba(190,226,255,.1);
  padding:24px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  color:#667D8C;
  font-size:14px;
}
.footer-bottom a{color:#667D8C}
.footer-bottom a:hover{color:var(--primary)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .nav-center-wrap{order:3;width:100%;flex-basis:100%;justify-content:flex-start;display:none}
  .main-nav-wrap{width:100%;background:rgba(7,18,31,.98);border-top:1px solid var(--border);padding:12px 0}
  .main-nav{flex-wrap:wrap;gap:4px}
  .main-nav a{padding:9px 13px;font-size:14px}
  .header-inner{flex-wrap:wrap;min-height:0;padding:10px 0}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .header-toolbar{margin-left:auto}
  .partner-link{display:none}
  .header-searchbox{width:150px}
  .site-header.open .nav-center-wrap{display:block}
  .category-hero h1{font-size:36px}
  .section-title{font-size:28px}
  .scene-card{
    grid-template-columns:1fr;
    padding:34px;
    gap:28px;
  }
  .scene-card.is-reverse{grid-template-columns:1fr}
  .scene-media img{aspect-ratio:16/10}
  .feat-item{border-left:0;padding:36px 24px;border-bottom:1px solid var(--border)}
  .feat-item:last-child{border-bottom:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 30px}
  .cta-panel{padding:40px 32px}
}
@media (max-width:768px){
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:68px 0}
  .category-hero{padding:62px 0 76px}
  .category-hero h1{font-size:32px}
  .hero-lead{font-size:16px}
  .header-searchbox{display:none}
  .header-cta .btn{width:auto;padding:0 16px}
  .auth-link{display:none}
  .process-card{padding:24px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-panel{flex-direction:column;align-items:flex-start;padding:32px 24px}
}
@media (max-width:520px){
  .section{padding:56px 0}
  .section-title{font-size:25px}
  .brand-text{font-size:17px}
  .brand-mark{width:36px;height:36px;font-size:16px}
  .header-cta .btn{height:40px;padding:0 14px;font-size:13px}
  .category-hero h1{font-size:28px;line-height:1.35}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .scene-card{padding:22px;border-radius:18px}
  .scene-info h3{font-size:22px}
  .dot-list li{font-size:14px}
  .section-head{margin-bottom:28px}
  .accordion-title{padding:16px 16px;font-size:15px}
  .accordion-content{padding:0 16px 10px;font-size:14px}
  .footer-grid{gap:26px}
  .footer-bottom{font-size:13px}
  .btn{height:44px}
}

/* roulang page: category3 */
:root {
      --bg-main: #07121F;
      --bg-deep: #0B1B2C;
      --bg-block: #0E2032;
      --glass-card: rgba(18, 37, 56, 0.58);
      --line-soft: rgba(190, 226, 255, 0.14);
      --line-strong: rgba(190, 226, 255, 0.28);
      --text-main: #EAF3FA;
      --text-weak: #9FB2C4;
      --primary: #18BFCB;
      --primary-glow: rgba(24, 191, 203, 0.28);
      --blue: #21A8E0;
      --amber: #FFB443;
      --radius-lg: 20px;
      --radius-md: 16px;
      --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
      --font-cn: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-cn);
      line-height: 1.75;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }

    a:hover,
    a:focus {
      color: #5FDCE6;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
    }

    ul,
    ol {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      margin: 0 0 16px;
      line-height: 1.3;
      font-weight: 700;
      color: #FFFFFF;
    }

    p {
      margin: 0 0 16px;
    }

    .grid-container {
      max-width: 1260px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 28px;
      padding-right: 28px;
    }

    .section {
      padding: 96px 0;
    }

    .section-soft {
      background: linear-gradient(180deg, rgba(14, 32, 50, 0.25) 0%, rgba(7, 18, 31, 0) 100%);
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.12em;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 14px;
    }

    .section-kicker::before {
      content: "";
      width: 26px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .section-title {
      font-size: clamp(30px, 3.6vw, 42px);
      margin-bottom: 16px;
    }

    .section-intro {
      font-size: 17px;
      color: var(--text-weak);
      max-width: 780px;
      margin-bottom: 0;
    }

    .section-head {
      margin-bottom: 50px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border-radius: 999px;
      padding: 13px 27px;
      min-height: 44px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1;
      border: 1px solid transparent;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
      background: transparent;
      color: var(--text-main);
    }

    .btn:hover,
    .btn:focus {
      transform: translateY(-2px);
      color: #FFFFFF;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--blue) 100%);
      box-shadow: 0 10px 30px rgba(24, 191, 203, 0.24);
      color: #04131F;
    }

    .btn-primary:hover,
    .btn-primary:focus {
      background: linear-gradient(135deg, #3AD8E4 0%, #43AEE0 100%);
      color: #04131F;
      box-shadow: 0 14px 36px rgba(24, 191, 203, 0.36);
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--line-strong);
      color: var(--text-main);
    }

    .btn-outline:hover,
    .btn-outline:focus {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--primary);
      color: #FFFFFF;
    }

    .btn-header {
      min-height: 40px;
      padding: 10px 20px;
      background: linear-gradient(135deg, var(--primary), var(--blue));
      color: #04131F;
      box-shadow: 0 6px 24px rgba(24, 191, 203, 0.2);
    }

    .btn-header:hover,
    .btn-header:focus {
      color: #04131F;
      box-shadow: 0 10px 28px rgba(24, 191, 203, 0.35);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(7, 18, 31, 0.86);
      -webkit-backdrop-filter: blur(16px);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line-soft);
    }

    .header-row {
      display: flex;
      align-items: center;
      gap: 16px;
      min-height: 78px;
    }

    .brand-lockup {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
      min-width: 218px;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 13px;
      background: linear-gradient(135deg, var(--primary), var(--blue));
      color: #04131F;
      font-size: 18px;
      box-shadow: 0 8px 24px rgba(24, 191, 203, 0.25);
    }

    .brand-text {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      white-space: nowrap;
      letter-spacing: 0.01em;
    }

    .brand-accent {
      color: var(--primary);
    }

    .brand-text:hover,
    .brand-text:focus {
      color: #FFFFFF;
    }

    .main-nav-wrap {
      display: flex;
      justify-content: center;
      flex: 1;
      min-width: 0;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .main-nav a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--text-weak);
      font-size: 15px;
      font-weight: 500;
      white-space: nowrap;
      border: 1px solid transparent;
    }

    .main-nav a:hover,
    .main-nav a:focus {
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.06);
    }

    .main-nav a.active {
      background: linear-gradient(135deg, rgba(24, 191, 203, 0.18), rgba(33, 168, 224, 0.12));
      color: #8DE7EF;
      border-color: rgba(24, 191, 203, 0.3);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-shrink: 0;
    }

    .header-search {
      display: flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--line-soft);
      border-radius: 999px;
      padding: 7px 13px;
      width: 190px;
      transition: border-color 0.2s ease;
    }

    .header-search:focus-within {
      border-color: rgba(24, 191, 203, 0.55);
      box-shadow: 0 0 0 4px rgba(24, 191, 203, 0.08);
    }

    .header-search i {
      color: var(--text-weak);
      font-size: 14px;
    }

    .header-search input {
      width: 100%;
      min-width: 0;
      background: transparent;
      border: 0;
      box-shadow: none;
      color: #FFFFFF;
      font-size: 14px;
      outline: 0;
      margin: 0;
      height: auto;
      padding: 0;
    }

    .header-search input::placeholder {
      color: #7F93A8;
    }

    .partner-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 9px 12px;
      color: var(--text-weak);
      font-size: 14px;
      border-radius: 999px;
      white-space: nowrap;
    }

    .partner-link:hover,
    .partner-link:focus {
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      margin-left: auto;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      border-radius: 12px;
      border: 1px solid var(--line-soft);
      background: rgba(255, 255, 255, 0.05);
      cursor: pointer;
    }

    .nav-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      border-radius: 2px;
      background: #D9E8F6;
    }

    .guide-hero {
      position: relative;
      padding: 104px 0 108px;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-position: center;
      background-size: cover;
      background-repeat: no-repeat;
    }

    .guide-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(7, 18, 31, 0.94) 0%, rgba(8, 23, 40, 0.78) 55%, rgba(12, 33, 55, 0.65) 100%);
    }

    .guide-hero>.grid-container {
      position: relative;
      z-index: 1;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 28px;
    }

    .breadcrumb a {
      color: var(--text-weak);
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .breadcrumb .breadcrumb-arrow {
      color: #55708A;
      font-size: 12px;
    }

    .breadcrumb .current {
      color: #A9C3DA;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 8px 16px;
      background: rgba(24, 191, 203, 0.12);
      color: #8DE7EF;
      border: 1px solid rgba(24, 191, 203, 0.32);
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 25px;
    }

    .guide-hero h1 {
      font-size: clamp(34px, 5vw, 54px);
      max-width: 820px;
      margin-bottom: 20px;
    }

    .guide-hero .hero-copy {
      max-width: 760px;
      color: #BFD1E2;
      font-size: 18px;
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .hero-trust {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 55px;
      padding-top: 32px;
      border-top: 1px solid rgba(190, 226, 255, 0.14);
    }

    .trust-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }

    .trust-item i {
      width: 24px;
      height: 24px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: rgba(24, 191, 203, 0.14);
      color: var(--primary);
      border-radius: 50%;
      font-size: 13px;
      flex-shrink: 0;
      margin-top: 4px;
    }

    .trust-item strong {
      display: block;
      color: #FFFFFF;
      font-size: 16px;
      margin-bottom: 4px;
    }

    .trust-item span {
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.6;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 46px;
    }

    .step-card {
      position: relative;
      background: var(--glass-card);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      border: 1px solid var(--line-soft);
      border-radius: var(--radius-lg);
      padding: 34px 25px 28px;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .step-card::after {
      content: "";
      position: absolute;
      width: 120px;
      height: 120px;
      border-radius: 50%;
      right: -42px;
      top: -46px;
      background: rgba(24, 191, 203, 0.08);
      filter: blur(6px);
    }

    .step-card:hover {
      transform: translateY(-6px);
      border-color: rgba(24, 191, 203, 0.45);
      box-shadow: var(--shadow-card);
    }

    .step-number {
      display: inline-flex;
      align-items: center;
      height: 32px;
      padding: 0 13px;
      margin-bottom: 24px;
      border-radius: 999px;
      background: rgba(24, 191, 203, 0.12);
      border: 1px solid rgba(24, 191, 203, 0.28);
      color: #8DE7EF;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
    }

    .step-card h3 {
      font-size: 22px;
      margin-bottom: 14px;
    }

    .step-card p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    .split-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 96px;
    }

    .split-block:last-child {
      margin-bottom: 0;
    }

    .split-block.reverse .split-copy {
      order: 0;
    }

    .split-block.reverse .split-media {
      order: 1;
    }

    .split-copy .section-kicker {
      margin-bottom: 16px;
    }

    .split-copy h2 {
      font-size: clamp(27px, 3vw, 38px);
      margin-bottom: 20px;
    }

    .split-copy>p {
      color: var(--text-weak);
      font-size: 17px;
      margin-bottom: 22px;
    }

    .tick-list {
      margin: 24px 0 30px;
      display: grid;
      gap: 14px;
    }

    .tick-list li {
      position: relative;
      padding-left: 32px;
      color: #C6D5E5;
      font-size: 16px;
    }

    .tick-list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 9px;
      width: 18px;
      height: 11px;
      border-left: 2px solid var(--primary);
      border-bottom: 2px solid var(--primary);
      transform: rotate(-45deg);
      border-radius: 2px;
    }

    .tick-list strong {
      color: #FFFFFF;
      font-weight: 600;
    }

    .split-media {
      position: relative;
    }

    .media-frame {
      position: relative;
      border-radius: 22px;
      overflow: hidden;
      border: 1px solid var(--line-strong);
      background: var(--bg-deep);
      box-shadow: var(--shadow-card);
      aspect-ratio: 1.18 / 1;
    }

    .media-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .media-frame::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 18, 31, 0) 40%, rgba(7, 18, 31, 0.88) 100%);
      pointer-events: none;
    }

    .media-note {
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 18px;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 13px 15px;
      border-radius: 14px;
      background: rgba(13, 32, 51, 0.72);
      border: 1px solid rgba(190, 226, 255, 0.18);
      -webkit-backdrop-filter: blur(10px);
      backdrop-filter: blur(10px);
      font-size: 14px;
      color: #D5E4F1;
    }

    .media-note i {
      color: var(--primary);
      width: 18px;
    }

    .faq-section {
      background: linear-gradient(180deg, rgba(14, 32, 50, 0.3), rgba(7, 18, 31, 0));
    }

    .faq-column {
      max-width: 940px;
      margin: 0 auto;
      padding-top: 48px;
    }

    .faq-wrap .accordion-item {
      background: var(--glass-card);
      -webkit-backdrop-filter: blur(13px);
      backdrop-filter: blur(13px);
      border: 1px solid var(--line-soft);
      border-radius: 18px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .faq-wrap .accordion-item.is-active {
      border-color: rgba(24, 191, 203, 0.4);
      box-shadow: 0 8px 34px rgba(0, 0, 0, 0.18);
    }

    .faq-wrap .accordion-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 26px;
      background: transparent;
      border: 0;
      color: #FFFFFF;
      font-size: 17px;
      font-weight: 600;
      border-radius: 0;
      line-height: 1.5;
      min-height: 0;
    }

    .faq-wrap .accordion-title:hover,
    .faq-wrap .accordion-title:focus {
      background: rgba(255, 255, 255, 0.03);
      color: #FFFFFF;
    }

    .faq-wrap .accordion-title::before {
      content: none;
    }

    .faq-icon {
      display: inline-flex;
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      border: 1px solid var(--line-strong);
      color: var(--primary);
      font-size: 14px;
      transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
    }

    .accordion-item.is-active .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #0A1C28;
      border-color: var(--primary);
    }

    .faq-wrap .accordion-content {
      padding: 0 26px 24px;
      border: 0;
      border-top: 1px solid rgba(190, 226, 255, 0.12);
      background: transparent;
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.9;
      min-height: 0;
    }

    .faq-wrap .accordion-content p {
      margin: 20px 0 0;
    }

    .cta-strip {
      position: relative;
      padding: 0 0 96px;
    }

    .cta-box {
      position: relative;
      overflow: hidden;
      border-radius: 26px;
      padding: 52px 54px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      align-items: center;
      gap: 40px;
      background: rgba(18, 37, 56, 0.58);
      border: 1px solid var(--line-strong);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: rgba(24, 191, 203, 0.12);
      filter: blur(30px);
      right: -90px;
      top: -180px;
    }

    .cta-box h2 {
      font-size: clamp(26px, 2.6vw, 36px);
      margin-bottom: 16px;
    }

    .cta-box p {
      color: var(--text-weak);
      font-size: 17px;
      margin-bottom: 0;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      position: relative;
      z-index: 1;
    }

    .site-footer {
      background: #06101B;
      border-top: 1px solid var(--line-soft);
      padding-top: 66px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.9fr 1fr;
      gap: 36px;
      padding-bottom: 46px;
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
    }

    .footer-brand-text {
      font-size: 19px;
      font-weight: 700;
      color: #FFFFFF;
      white-space: nowrap;
    }

    .footer-about p {
      color: #86A1B9;
      font-size: 15px;
      max-width: 340px;
    }

    .footer-title {
      font-size: 16px;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: 0.04em;
    }

    .footer-links {
      display: grid;
      gap: 11px;
    }

    .footer-links a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #90A9BF;
      font-size: 15px;
    }

    .footer-links a::before {
      content: "";
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: var(--primary);
      opacity: 0.7;
    }

    .footer-links a:hover,
    .footer-links a:focus {
      color: #FFFFFF;
      padding-left: 3px;
    }

    .footer-contact-list {
      display: grid;
      gap: 13px;
    }

    .footer-contact-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #90A9BF;
      font-size: 15px;
    }

    .footer-contact-list i {
      width: 16px;
      color: var(--primary);
      text-align: center;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      border-top: 1px solid rgba(190, 226, 255, 0.1);
      padding: 22px 0 26px;
      font-size: 14px;
      color: #6C8398;
    }

    .footer-bottom a {
      color: #6C8398;
    }

    .footer-bottom a:hover {
      color: var(--primary);
    }

    .footer-bottom .footer-domain {
      font-family: "Arial", Arial, Helvetica, sans-serif;
      letter-spacing: 0.02em;
    }

    @media (max-width: 1200px) {
      .header-search {
        width: 154px;
      }

      .partner-link {
        display: none;
      }

      .main-nav a {
        padding: 10px 10px;
        font-size: 14px;
      }
    }

    @media (max-width: 1023px) {
      .steps-grid {
        grid-template-columns: 1fr;
      }

      .split-block {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .split-block.reverse .split-copy {
        order: 1;
      }

      .split-block.reverse .split-media {
        order: 0;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .cta-box {
        grid-template-columns: 1fr;
        padding: 40px 32px;
      }
    }

    @media (max-width: 900px) {
      .header-actions .header-search {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
        margin-left: 4px;
      }

      .main-nav-wrap {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(8, 21, 35, 0.98);
        border-bottom: 1px solid var(--line-soft);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        padding: 8px 28px 18px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
      }

      .main-nav-wrap.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
      }

      .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
      }

      .main-nav a {
        justify-content: flex-start;
        padding: 14px 16px;
        font-size: 16px;
      }

      .main-nav a.active {
        background: rgba(24, 191, 203, 0.13);
      }

      .brand-lockup {
        min-width: 0;
      }

      .header-row {
        gap: 12px;
      }
    }

    @media (max-width: 700px) {
      .grid-container {
        padding-left: 20px;
        padding-right: 20px;
      }

      .section {
        padding: 72px 0;
      }

      .guide-hero {
        padding: 76px 0 80px;
      }

      .guide-hero h1 {
        font-size: 32px;
      }

      .guide-hero .hero-copy {
        font-size: 16px;
      }

      .hero-trust {
        grid-template-columns: 1fr;
        margin-top: 36px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .cta-box {
        padding: 34px 24px;
        border-radius: 20px;
      }

      .faq-wrap .accordion-title {
        padding: 18px 18px;
        font-size: 16px;
      }

      .faq-wrap .accordion-content {
        padding: 0 18px 20px;
        font-size: 15px;
      }

      .step-card {
        padding: 26px 20px;
      }

      .split-copy h2 {
        font-size: 27px;
      }

      .btn-header {
        padding: 9px 14px;
        font-size: 14px;
      }

      .brand-text {
        font-size: 17px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 16px;
      }
    }

    @media (max-width: 520px) {
      .header-actions .btn-header {
        display: none;
      }

      .brand-lockup {
        margin-right: auto;
      }

      .header-row {
        min-height: 68px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
    }

/* roulang page: category4 */
:root{
  --bg:#07121F;
  --bg-deep:#06101B;
  --bg-soft:#0B1B2C;
  --panel:#0E2032;
  --primary:#18BFCB;
  --primary-light:#4BD9E6;
  --primary-deep:#21A8E0;
  --accent:#FFB443;
  --text:#EAF3FA;
  --muted:#9FB2C4;
  --border:rgba(190,226,255,0.14);
  --glass:rgba(18,37,56,0.58);
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.28);
  --shadow-glow:0 8px 34px rgba(24,191,203,.22);
  --spacer:100px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,Roboto,"DIN Alternate","Arial",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .25s ease, background .25s ease;}
a:hover{color:var(--primary-light);}
ul,ol{margin:0;padding:0;}
button,input,select,textarea{font-family:inherit;}
input:focus{outline:2px solid rgba(24,191,203,.45);outline-offset:2px;}
a:focus-visible{outline:2px solid var(--primary);outline-offset:4px;border-radius:4px;}
.grid-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.site-header{
  position:sticky;
  top:0;
  z-index:99;
  background:rgba(7,18,31,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.site-header .grid-container{padding-left:20px;padding-right:20px;}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:16px;}
.site-brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font-size:19px;font-weight:600;letter-spacing:.3px;color:#fff!important;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(24,191,203,.2),rgba(33,168,224,.2));
  border:1px solid rgba(24,191,203,.35);
  color:var(--primary);font-size:18px;box-shadow:0 0 18px rgba(24,191,203,.12);
}
.main-nav-wrap{margin-left:12px;}
.main-nav{display:flex;gap:4px;list-style:none;margin:0;padding:0;}
.main-nav a{
  display:inline-block;padding:10px 16px;border-radius:99px;font-size:14.5px;color:var(--muted);
  transition:background .25s,color .25s;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.05);}
.main-nav a.active{color:#fff;background:rgba(24,191,203,.13);box-shadow:inset 0 0 0 1px rgba(24,191,203,.2);}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0;}
.search-btn{width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--muted);border:1px solid var(--border);background:rgba(255,255,255,.03);transition:.25s;}
.search-btn:hover{color:var(--primary);border-color:rgba(24,191,203,.35);background:rgba(24,191,203,.08);}
.ghost-btn,.primary-btn,.line-btn{
  display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:600;letter-spacing:.2px;line-height:1.6;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
  cursor:pointer;text-align:center;
}
.ghost-btn{background:transparent;border:1px solid rgba(190,226,255,.28);color:#dce9f5;padding:9px 18px;font-size:14px;}
.ghost-btn:hover{color:#fff;border-color:rgba(24,191,203,.8);background:rgba(24,191,203,.08);box-shadow:0 0 18px rgba(24,191,203,.08);transform:translateY(-1px);}
.primary-btn{background:var(--primary);border:1px solid transparent;color:#031017;padding:10px 24px;font-size:14.5px;box-shadow:0 8px 24px rgba(24,191,203,.18);}
.primary-btn:hover{color:#04141c;background:var(--primary-light);transform:translateY(-2px);box-shadow:0 12px 32px rgba(24,191,203,.32);}
.primary-btn.small-pad{padding:9px 17px;}
.line-btn{background:transparent;border:1px solid rgba(24,191,203,.5);color:var(--primary);padding:10px 22px;font-size:14.5px;}
.line-btn:hover{background:rgba(24,191,203,.08);border-color:var(--primary);color:#fff;transform:translateY(-1px);}
.mobile-toggle{display:none;width:42px;height:42px;border:1px solid var(--border);background:rgba(255,255,255,.04);border-radius:10px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;}
.mobile-toggle span{display:block;width:18px;height:2px;background:#cbd9e6;border-radius:2px;transition:.25s;}
.section{padding:90px 0;}
.sec-head{margin-bottom:38px;max-width:620px;}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--primary);letter-spacing:1.5px;text-transform:uppercase;border:1px solid rgba(24,191,203,.25);border-radius:999px;padding:5px 14px;background:rgba(24,191,203,.06);margin-bottom:16px;}
.sec-title{font-size:32px;line-height:1.35;margin-bottom:12px;color:#fff;font-weight:700;letter-spacing:.4px;}
.sec-desc{font-size:16px;color:var(--muted);}
.section-banner{
  position:relative;overflow:hidden;min-height:420px;padding:110px 0 70px;display:flex;align-items:center;
  background:
    linear-gradient(112deg,rgba(4,10,18,.96) 20%,rgba(5,17,31,.86) 55%,rgba(11,30,45,.72) 100%),
    url('/assets/images/backpic/back-3.webp') center/cover;
}
.section-banner:before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:30px 30px;
  opacity:.5;
}
.section-banner:after{
  content:"";position:absolute;width:480px;height:480px;border-radius:50%;right:-180px;bottom:-220px;pointer-events:none;
  background:radial-gradient(circle,rgba(24,191,203,.12),transparent 62%);
}
.banner-content{position:relative;z-index:2;}
.breadcrumb-p{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.breadcrumb-p a{color:var(--muted);}
.breadcrumb-p a:hover{color:var(--primary);}
.news-cat-flag{color:var(--accent);font-size:13px;letter-spacing:1.3px;}
.section-banner h1{
  font-size:46px;line-height:1.25;margin:0 0 22px;color:#fff;font-weight:800;max-width:880px;letter-spacing:.5px;
}
.hl-primary{color:var(--primary-light);}
.banner-lead{font-size:17px;color:#c9dae8;max-width:760px;margin:0 0 36px;}
.btn-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.news-cloud{position:absolute;width:120px;height:120px;top:80px;right:100px;opacity:.28;filter:blur(2px);z-index:1;}
.featured-section{padding:90px 0 20px;position:relative;}
.featured-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;position:relative;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow);
}
.featured-card .grid-x{display:flex;flex-wrap:wrap;align-items:stretch;}
.featured-card .media-col{flex:1 1 46%;padding:30px;display:flex;}
.featured-card .info-col{flex:1 1 54%;padding:44px 40px;display:flex;flex-direction:column;justify-content:center;}
.featured-media{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border);width:100%;height:100%;object-fit:cover;}
.pin-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,180,67,.13);border:1px solid rgba(255,180,67,.45);color:var(--accent);padding:6px 16px;border-radius:99px;font-size:13px;font-weight:600;margin-bottom:18px;}
.featured-card h2{font-size:26px;line-height:1.45;margin-bottom:14px;font-weight:700;color:#fff;}
.featured-txt{color:#c6d5e4;margin-bottom:20px;font-size:15.5px;}
.feature-point-grid{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 20px;margin-bottom:26px;}
.feature-point-grid li{display:flex;gap:10px;align-items:flex-start;color:#dbe7f2;font-size:14.5px;}
.fp-ic{color:var(--primary);flex-shrink:0;}
.timeline-section{padding:70px 0 30px;}
.timeline-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;flex-wrap:wrap;}
.timeline-link{font-size:14px;color:var(--muted);display:inline-flex;align-items:center;gap:8px;}
.timeline-link i{font-size:13px;}
.timeline-wrap{position:relative;margin-top:28px;}
.timeline-wrap:before{
  content:"";position:absolute;left:16px;top:8px;bottom:8px;width:2px;transform:translateX(-50%);
  background:linear-gradient(to bottom,rgba(24,191,203,.3),rgba(24,191,203,.06));
}
.timeline-list{list-style:none;display:grid;gap:14px;}
.timeline-item{
  position:relative;display:flex;gap:26px;padding:14px 0 14px 44px;align-items:flex-start;
}
.timeline-item:before{
  content:"";position:absolute;left:0;top:30px;width:13px;height:13px;border-radius:50%;transform:translateX(-35%);
  background:#07121f;border:3px solid var(--primary);box-shadow:0 0 14px rgba(24,191,203,.5);
}
.tl-card{
  display:flex;gap:24px;flex:1;background:rgba(13,31,48,.6);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:24px 26px;transition:transform .25s,border-color .25s,background .25s;align-items:flex-start;flex-wrap:wrap;
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(24,191,203,.35);background:rgba(16,40,59,.72);}
.tl-date{width:100px;flex-shrink:0;color:var(--muted);font-weight:600;font-size:14px;letter-spacing:.5px;}
.tl-date strong{display:block;color:#dbe7f2;font-size:24px;line-height:1.2;}
.tl-content{flex:1;min-width:230px;}
.tl-content h3{font-size:19px;color:#fff;line-height:1.5;margin:0 0 8px;}
.tl-content p{font-size:14.8px;line-height:1.9;color:var(--muted);margin:0 0 12px;}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.tl-badge{font-size:12.5px;border:1px solid var(--border);background:rgba(255,255,255,.03);color:#aec2d5;padding:3px 13px;border-radius:99px;}
.quick-nav-section{padding:70px 0 20px;}
.quick-nav-panel{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;
}
.quick-nav-link{
  display:flex;align-items:center;gap:16px;padding:22px 24px;border-radius:var(--radius-md);
  background:rgba(14,32,50,.55);border:1px solid var(--border);transition:.25s;
}
.quick-nav-link:hover{transform:translateY(-2px);border-color:rgba(24,191,203,.4);}
.quick-nav-link .qn-ic{width:44px;height:44px;flex-shrink:0;border-radius:12px;background:rgba(24,191,203,.12);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:19px;}
.qn-title{font-weight:600;color:#e4edf5;font-size:16px;display:block;line-height:1.3;}
.qn-sub{font-size:13.5px;color:var(--muted);margin-top:4px;display:block;}
.cta-guide-section{padding:80px 0;}
.cta-guide-card{
  background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border);border-radius:var(--radius-lg);padding:50px;box-shadow:var(--shadow);
  text-align:center;position:relative;overflow:hidden;
}
.cta-guide-card:before{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;left:-130px;top:-120px;
  background:radial-gradient(circle,rgba(24,191,203,.13),transparent 60%);
}
.cta-guide-card .sec-title{margin-bottom:12px;}
.cta-guide-card p{color:var(--muted);max-width:690px;margin:0 auto 28px;font-size:15.5px;}
.site-footer{border-top:1px solid var(--border);background:var(--bg-deep);padding-top:70px;position:relative;}
.site-footer .grid-container{padding-left:24px;padding-right:24px;}
.footer-grid{
  display:grid;grid-template-columns:3fr 2fr 2fr 2.5fr;gap:48px;padding-bottom:50px;
}
.footer-brand{display:inline-flex;align-items:center;gap:11px;font-size:20px;color:#fff;font-weight:600;}
.footer-brand .brand-mark{width:42px;height:42px;}
.footer-about p{font-size:14.5px;line-height:1.95;margin-top:18px;color:var(--muted);}
.footer-title{font-size:16px;color:#fff;font-weight:600;margin-bottom:18px;letter-spacing:.4px;}
.footer-links{display:grid;gap:11px;}
.footer-links a{font-size:14.5px;color:var(--muted);}
.footer-links a:hover{color:var(--primary);}
.footer-contact-list{list-style:none;}
.footer-contact-list li{display:flex;align-items:center;gap:12px;font-size:14.5px;padding:7px 0;color:var(--muted);}
.footer-contact-list i{color:var(--primary);flex-shrink:0;}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;border-top:1px solid var(--border);
  padding:24px 0;margin-top:6px;color:var(--muted);font-size:13.5px;
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--primary);}
@media screen and (max-width:1024px){
  .section-banner{padding:90px 0 56px;}
  .section-banner h1{font-size:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:38px 30px;}
  .quick-nav-panel{grid-template-columns:1fr;}
  .timeline-item{gap:14px;}
  .tl-date{width:78px;flex-shrink:0;}
  .main-nav-wrap{
    position:fixed;left:0;right:0;top:72px;background:rgba(7,18,31,.97);backdrop-filter:blur(16px);
    display:none;padding:18px 22px;border-bottom:1px solid var(--border);box-shadow:0 26px 40px rgba(0,0,0,.35);max-height:calc(100vh - 72px);overflow:auto;
  }
  .main-nav-wrap.open{display:block;}
  .main-nav{flex-direction:column;gap:6px;}
  .header-actions .main-nav-toggle{margin-left:auto;}
  .mobile-toggle{display:flex;margin-left:4px;}
  .hide-for-only-small{display:none!important;}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap;gap:8px;}
  .header-actions{margin-left:auto;order:2;}
  .primary-btn.small-pad{padding:9px 14px;}
  .brand-text span{font-size:16px;}
  .section-banner h1{font-size:33px;}
  .section-banner{padding:70px 0 50px;}
  .banner-lead{font-size:15.5px;}
  .btn-row{gap:10px;}
  .featured-card{margin:0;}
  .featured-card .media-col{flex-basis:100%;padding:24px;}
  .featured-card .info-col{flex-basis:100%;padding:24px 26px;}
  .feature-point-grid{grid-template-columns:1fr;}
  .section{padding:60px 0;}
  .sec-title{font-size:27px;}
  .timeline-section .timeline-head{display:block;}
  .timeline-wrap:before{left:11px;}
  .timeline-item{padding-left:26px;flex-direction:column;}
  .timeline-item:before{left:0;width:11px;height:11px;}
  .tl-card{padding:20px;}
  .tl-date{width:auto;}
  .tl-date strong{display:inline-block;margin-left:4px;}
  .quick-nav-section{padding:55px 0 10px;}
  .footer-grid{grid-template-columns:1fr;gap:36px;}
  .cta-guide-card{padding:32px 24px;}
}
@media(max-width:520px){
  .header-actions .ghost-btn{display:none;}
  .header-actions .primary-btn{font-size:13.5px;padding:9px 12px;}
  .search-btn{display:none;}
}