/* roulang page: index */
:root {
  --primary: #00B8D9;
  --primary-strong: #0090FF;
  --primary-glow: rgba(0,184,217,.35);
  --accent: #E8A33D;
  --accent-soft: rgba(232,163,61,.18);
  --bg-deep: #060C16;
  --bg-section: #081120;
  --bg-card: #0D1B2A;
  --bg-card-glass: rgba(13,27,42,.72);
  --border-light: rgba(255,255,255,.08);
  --border-mid: rgba(255,255,255,.13);
  --text-main: #E8EFF7;
  --text-muted: rgba(232,239,247,.68);
  --text-dim: rgba(232,239,247,.42);
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.2);
  --shadow-glow: 0 0 20px rgba(0,184,217,.22), 0 6px 28px rgba(0,0,0,.32);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --space-section: 96px;
  --space-section-mobile: 56px;
  --transition-base: all .25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition-base); }
ul, ol { list-style: none; }
button, input { font-family: inherit; }

.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .5px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
  margin-bottom: 10px;
}
.section-header h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--primary), var(--primary-strong));
}
.section-header p {
  color: var(--text-muted);
  font-size: 15px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  padding: 12px 28px;
  border: 1px solid transparent;
  transition: var(--transition-base);
  letter-spacing: .3px;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.btn-primary {
  background: linear-gradient(135deg, #00B8D9 0%, #0090FF 100%);
  color: #fff;
  border: none;
  box-shadow: 0 4px 18px rgba(0,144,255,.28);
}
.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(0,144,255,.5);
  transform: translateY(-2px);
  background: linear-gradient(135deg, #0ac8e8 0%, #0a9aff 100%);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(0,144,255,.3);
}
.btn-primary .fa-download { font-size: 18px; }

.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,.3);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0,184,217,.08);
  transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0); }

.btn-lg { padding: 15px 40px; font-size: 17px; border-radius: 10px; }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: var(--radius-xs); }

.btn-glow {
  box-shadow: 0 0 34px rgba(0,184,217,.35), 0 6px 28px rgba(0,0,0,.3);
}
.btn-glow:hover {
  box-shadow: 0 0 48px rgba(0,184,217,.55), 0 8px 36px rgba(0,0,0,.35);
}

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(6,12,22,.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.header-top {
  height: 56px;
  display: flex;
  align-items: center;
}
.header-top .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #00B8D9, #0090FF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  box-shadow: 0 2px 12px rgba(0,144,255,.35);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
  background: linear-gradient(90deg, #fff 0%, #d6f2ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-actions .btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,.2);
  color: var(--text-main);
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-pill);
}
.header-actions .btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.header-actions .btn-primary-mini {
  background: linear-gradient(135deg, #00B8D9, #0090FF);
  border: none;
  color: #fff;
  padding: 6px 16px;
  font-size: 13px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(0,144,255,.25);
}
.header-actions .btn-primary-mini:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,144,255,.4); }

.header-nav {
  height: 44px;
  border-top: 1px solid rgba(255,255,255,.05);
  display: flex;
  align-items: center;
}
.nav-channels {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
  margin: 0;
  padding: 0;
}
.nav-channels .nav-link {
  display: inline-flex;
  align-items: center;
  height: 100%;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  border: none;
  background: transparent;
  padding: 0 2px;
}
.nav-channels .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--primary), var(--primary-strong));
  opacity: 0;
  transition: var(--transition-base);
}
.nav-channels .nav-link:hover {
  color: #fff;
}
.nav-channels .nav-link.active {
  color: #fff;
}
.nav-channels .nav-link.active::after {
  opacity: 1;
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 96px 0 80px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,.06);
  overflow: hidden;
}
.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6,12,22,.96) 30%, rgba(6,12,22,.78) 70%, rgba(0,184,217,.25) 100%);
  z-index: 1;
}
.hero-section .container {
  position: relative;
  z-index: 2;
}
.hero-content {
  padding-right: 24px;
}
.hero-content h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.25;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #fff 10%, #b8ecff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 440px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.glass-frame {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card), 0 0 42px rgba(0,184,217,.14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  width: 100%;
  max-width: 460px;
}
.glass-frame img {
  border-radius: var(--radius-md);
  width: 100%;
  object-fit: cover;
}
.float-badge {
  position: absolute;
  background: rgba(10,20,35,.9);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 7px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  white-space: nowrap;
}
.float-badge i { color: var(--primary); }
.float-badge .fa-check-circle { color: #38d9a9; }
.float-badge .fa-rocket { color: var(--primary); }
.badge-1 {
  top: -18px;
  right: -8px;
  animation: floatY 4s ease-in-out infinite;
}
.badge-2 {
  bottom: -16px;
  left: -12px;
  animation: floatY 5s ease-in-out infinite .8s;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ===== Features ===== */
.features-section {
  padding: var(--space-section) 0;
  background: var(--bg-section);
}
.features-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.feature-card {
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-strong));
  opacity: 0;
  transition: var(--transition-base);
}
.feature-card:hover {
  border-color: rgba(0,184,217,.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.feature-card:hover::after { opacity: 1; }
.feature-card.feature-large {
  background: linear-gradient(135deg, rgba(0,184,217,.14), rgba(13,27,42,.8));
}
.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(0,184,217,.14);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 21px;
  margin-bottom: 18px;
  border: 1px solid rgba(0,184,217,.22);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
}
.feature-card.feature-large h3 { font-size: 22px; }
.feature-card.feature-large p { font-size: 15px; }

/* ===== Requirements ===== */
.requirements-section {
  padding: var(--space-section) 0;
  background: var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.req-info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.req-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.req-item:last-child { border-bottom: none; }
.req-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 17px;
  flex-shrink: 0;
}
.req-label {
  font-size: 13px;
  color: var(--text-dim);
  display: block;
}
.req-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}
.req-compat {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.compat-title {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: .5px;
}
.compat-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  transition: var(--transition-base);
}
.compat-item:hover {
  border-color: rgba(0,184,217,.3);
  background: rgba(0,184,217,.06);
}
.compat-item i {
  font-size: 20px;
  color: var(--primary);
  width: 28px;
  text-align: center;
}
.compat-item span {
  font-size: 14px;
  font-weight: 500;
}

/* ===== Reviews ===== */
.reviews-section {
  padding: var(--space-section) 0;
  background: var(--bg-section);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.reviews-wrap {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.review-card {
  width: 280px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  position: relative;
  transition: var(--transition-base);
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(232,163,61,.25);
}
.review-card:nth-child(2) { transform: translateY(16px); }
.review-card:nth-child(2):hover { transform: translateY(12px); }
.review-card:nth-child(3) { transform: translateY(8px); }
.review-card:nth-child(3):hover { transform: translateY(4px); }
.stars {
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.review-text {
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 18px;
  min-height: 68px;
}
.reviewer {
  display: flex;
  align-items: center;
  gap: 10px;
}
.reviewer-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00B8D9, #0090FF);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}
.reviewer-name {
  font-size: 14px;
  font-weight: 600;
}
.reviewer-source {
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== Download ===== */
.download-section {
  padding: var(--space-section) 0;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  position: relative;
  text-align: center;
}
.download-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(6,12,22,.88);
}
.download-section .container {
  position: relative;
  z-index: 2;
}
.download-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.download-section .lead {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 38px;
  font-size: 15px;
}
.btn-download {
  padding: 20px 56px;
  font-size: 18px;
  border-radius: 12px;
}
.download-helper {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-dim);
}
.download-helper a {
  color: var(--text-muted);
}
.download-helper a:hover {
  color: var(--primary);
}
.download-helper .dot { opacity: .5; }

/* ===== News CMS ===== */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg-deep);
}
.news-section .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 36px;
  text-align: left;
}
.news-section .section-header h2 {
  font-size: 28px;
}
.news-section .section-header h2::after {
  left: 0;
  transform: none;
}
.view-all {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}
.view-all:hover {
  color: #fff;
  text-decoration: underline;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-list-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.news-list-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--primary-strong));
  opacity: 0;
  transition: var(--transition-base);
}
.news-list-card:hover {
  border-color: rgba(0,184,217,.3);
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}
.news-list-card:hover::after { opacity: 1; }
.news-date {
  flex-shrink: 0;
  min-width: 90px;
  text-align: center;
  padding: 8px 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}
.news-date .date-day {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.news-date .date-month {
  font-size: 12px;
  color: var(--text-dim);
}
.news-main {
  flex: 1;
  min-width: 0;
}
.news-main h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-main h3 a {
  color: var(--text-main);
}
.news-main h3 a:hover { color: var(--primary); }
.news-main p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.news-cat {
  flex-shrink: 0;
}
.badge-cat {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(232,163,61,.3);
  border-radius: var(--radius-pill);
  padding: 5px 16px;
  font-size: 12px;
  font-weight: 600;
}
.news-empty {
  background: var(--bg-card-glass);
  border: 1px dashed rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  padding: 60px 30px;
  text-align: center;
  color: var(--text-dim);
  font-size: 15px;
}
.news-empty i {
  font-size: 34px;
  color: var(--text-dim);
  margin-bottom: 12px;
  display: block;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-section);
  border-top: 1px solid rgba(255,255,255,.04);
}
.faq-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 48px;
}
.faq-sidebar {
  padding: 32px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  height: fit-content;
}
.faq-sidebar h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.faq-sidebar p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.faq-sidebar .faq-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-sidebar .faq-links a {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.faq-sidebar .faq-links a:hover { color: var(--primary); }
.faq-sidebar .faq-links a i { color: var(--primary); font-size: 12px; }

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-base);
}
.faq-item:hover {
  border-color: rgba(0,184,217,.25);
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
}
.faq-question .faq-arrow {
  color: var(--primary);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-question[aria-expanded="true"] .faq-arrow {
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.85;
}

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 64px 0;
  background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
  position: relative;
  text-align: center;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,184,217,.72), rgba(0,90,255,.78));
}
.cta-banner .container {
  position: relative;
  z-index: 2;
}
.cta-banner h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.cta-banner p {
  color: rgba(255,255,255,.85);
  margin-bottom: 28px;
  font-size: 15px;
}
.btn-light-custom {
  background: #fff;
  color: #006a8c;
  border: none;
  padding: 14px 40px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 20px rgba(0,0,0,.15);
}
.btn-light-custom:hover {
  background: #e8f7ff;
  color: #0083ad;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0,0,0,.2);
}

/* ===== Footer ===== */
.site-footer {
  background: #040810;
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,.05);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 16px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 16px;
  max-width: 280px;
}
.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer-links a {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  padding: 5px 0;
}
.footer-links a:hover {
  color: var(--primary);
  transform: translateX(3px);
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 0;
}
.footer-contact li i {
  color: var(--primary);
  width: 18px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .hero-content h1 { font-size: 36px; }
  .hero-section { padding: 64px 0 56px; }
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }
  .feature-card.feature-large {
    grid-column: 1 / -1;
  }
  .req-grid { grid-template-columns: 1fr; gap: 32px; }
  .faq-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 767px) {
  .space-section { --space-section: 56px; }
  .header-nav .container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-channels {
    flex-wrap: nowrap;
    gap: 28px;
    padding-bottom: 4px;
  }
  .nav-channels .nav-link {
    white-space: nowrap;
    font-size: 14px;
  }
  .hero-section { padding: 48px 0 56px; }
  .hero-content {
    padding-right: 0;
    margin-bottom: 40px;
    text-align: center;
  }
  .hero-content h1 { font-size: 31px; }
  .hero-sub {
    margin-left: auto;
    margin-right: auto;
    font-size: 15px;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-visual {
    margin-top: 12px;
  }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card.feature-large { grid-column: auto; }
  .reviews-wrap {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 16px;
  }
  .review-card {
    min-width: 260px;
  }
  .review-card:nth-child(2),
  .review-card:nth-child(3) {
    transform: none;
  }
  .news-list-card {
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
  }
  .news-date {
    min-width: auto;
    text-align: left;
    padding: 6px 14px;
  }
  .news-cat { align-self: flex-start; }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .download-section h2 { font-size: 26px; }
  .btn-download {
    padding: 16px 40px;
    font-size: 16px;
  }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 24px; }
}

@media (max-width: 575px) {
  .header-actions .btn-ghost {
    display: none;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-actions {
    flex-direction: column;
  }
  .features-grid { gap: 16px; }
  .feature-card { padding: 24px 20px; }
  .news-section .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .cta-banner h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* roulang page: category1 */
:root {
    --primary: #00B8D9;
    --primary-deep: #0090FF;
    --accent: #D9A441;
    --bg-main: #060C16;
    --bg-card: #0D1B2A;
    --bg-footer: #03070D;
    --text-main: #E6F0F8;
    --text-strong: #FFFFFF;
    --text-muted: rgba(230, 240, 248, 0.72);
    --border-soft: rgba(255, 255, 255, 0.1);
    --radius-card: 12px;
    --radius-btn: 10px;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 184, 217, 0.35);
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

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

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    margin: 0;
    font-family: inherit;
    line-height: 1.4;
    color: var(--text-strong);
  }

  h2 {
    font-size: 30px;
    font-weight: 600;
    letter-spacing: 0.5px;
    position: relative;
  }

  h2::after {
    content: "";
    display: block;
    width: 42px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), rgba(0, 184, 217, 0.15));
    border-radius: 2px;
    margin-top: 12px;
  }

  h3 {
    font-size: 20px;
    font-weight: 600;
  }

  p {
    margin: 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

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

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

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

  button {
    font-family: inherit;
  }

  .container {
    max-width: 1200px;
  }

  a:focus-visible,
  button:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
  }

  /* ===== 导航 ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(6, 12, 22, 0.86);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-soft);
  }

  .header-top .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
  }

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

  .logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    border-radius: 9px;
    color: #fff;
    font-size: 17px;
    box-shadow: 0 0 18px rgba(0, 184, 217, 0.3);
    flex-shrink: 0;
  }

  .logo-text {
    color: var(--text-strong);
    font-size: 19px;
    font-weight: 600;
    letter-spacing: 0.5px;
    white-space: nowrap;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    border: 1px solid var(--border-soft);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-main);
    background: transparent;
    transition: all 0.2s ease;
  }

  .btn-ghost:hover {
    color: var(--text-strong);
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.05);
  }

  .btn-ghost:active {
    transform: scale(0.98);
  }

  .btn-primary-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    border: none;
    box-shadow: 0 4px 16px rgba(0, 184, 217, 0.24);
    transition: all 0.2s ease;
  }

  .btn-primary-mini:hover {
    color: #fff;
    box-shadow: 0 0 24px rgba(0, 184, 217, 0.45);
    transform: translateY(-1px);
  }

  .btn-primary-mini:active {
    transform: translateY(0);
  }

  .header-nav {
    border-top: 1px solid var(--border-soft);
  }

  .header-nav .nav-channels {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 44px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
  }

  .header-nav .nav-channels::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    display: inline-block;
    position: relative;
    color: var(--text-muted);
    font-size: 15px;
    padding: 8px 2px;
    transition: color 0.2s ease;
  }

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

  .nav-link.active {
    color: var(--text-strong);
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-deep));
    border-radius: 2px;
  }

  /* ===== 分类页 Hero ===== */
  .category-hero {
    position: relative;
    padding: 84px 0;
    min-height: 440px;
    display: flex;
    align-items: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border-soft);
  }

  .category-hero .hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
  }

  .category-hero .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(6, 12, 22, 0.74) 0%, rgba(6, 12, 22, 0.88) 55%, rgba(6, 12, 22, 0.96) 100%);
  }

  .category-hero .hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
    margin: 0 auto;
    text-align: center;
  }

  .badge-category {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 999px;
    background: rgba(0, 184, 217, 0.14);
    border: 1px solid rgba(0, 184, 217, 0.45);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 20px;
  }

  .category-hero h1 {
    font-size: 40px;
    font-weight: 700;
    margin: 0 0 16px;
    color: var(--text-strong);
  }

  .category-hero .hero-sub {
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 32px;
  }

  .hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    border: none;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 0 20px rgba(0, 184, 217, 0.3);
    transition: all 0.25s ease;
  }

  .btn-primary:hover {
    color: #fff;
    box-shadow: 0 0 32px rgba(0, 184, 217, 0.5);
    transform: translateY(-2px);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 16px rgba(0, 184, 217, 0.35);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-soft);
    color: var(--text-main);
    font-size: 15px;
    transition: all 0.25s ease;
  }

  .btn-secondary:hover {
    color: var(--text-strong);
    border-color: rgba(0, 184, 217, 0.5);
    background: rgba(0, 184, 217, 0.08);
    transform: translateY(-2px);
  }

  .btn-secondary:active {
    transform: translateY(0);
  }

  /* ===== 分类介绍区 ===== */
  .section-intro {
    padding: 96px 0;
  }

  .intro-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
  }

  .intro-text h2 {
    margin-bottom: 20px;
  }

  .intro-text h2::after {
    margin-left: 0;
  }

  .intro-text p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 16px;
  }

  .intro-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: rgba(13, 27, 42, 0.72);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    transition: all 0.25s ease;
  }

  .feature-item:hover {
    border-color: rgba(0, 184, 217, 0.35);
    transform: translateX(4px);
    box-shadow: var(--shadow-card);
  }

  .feature-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 184, 217, 0.12);
    color: var(--primary);
    font-size: 18px;
  }

  .feature-item h3 {
    font-size: 17px;
    color: var(--text-strong);
    margin-bottom: 6px;
  }

  .feature-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
  }

  /* ===== 热门内容推荐 ===== */
  .section-topics {
    padding: 96px 0;
    background: rgba(13, 27, 42, 0.5);
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
  }

  .section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
  }

  .section-head h2::after {
    margin-left: auto;
    margin-right: auto;
  }

  .section-head p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin-top: 14px;
  }

  .topic-grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr 1fr;
    gap: 24px;
    align-items: stretch;
  }

  .topic-card {
    background: rgba(13, 27, 42, 0.72);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
  }

  .topic-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 184, 217, 0.4);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  }

  .topic-card img {
    width: 100%;
    object-fit: cover;
  }

  .topic-card-lg img {
    height: 320px;
  }

  .topic-card:not(.topic-card-lg) img {
    height: 180px;
  }

  .topic-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
  }

  .topic-card-lg .topic-card-body {
    padding: 32px;
  }

  .badge-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(217, 164, 65, 0.12);
    border: 1px solid rgba(217, 164, 65, 0.35);
    color: var(--accent);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 14px;
  }

  .topic-card h3 {
    font-size: 19px;
    color: var(--text-strong);
    margin-bottom: 10px;
  }

  .topic-card-lg h3 {
    font-size: 22px;
  }

  .topic-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
  }

  .link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    margin-top: auto;
    transition: color 0.2s ease;
  }

  .link-arrow:hover {
    color: #fff;
  }

  .link-arrow i {
    transition: transform 0.2s ease;
  }

  .link-arrow:hover i {
    transform: translateX(4px);
  }

  .topic-card-lg {
    grid-row: span 2;
    display: flex;
    flex-direction: column;
  }

  /* ===== 版本与系统要求 ===== */
  .section-compat {
    padding: 96px 0;
  }

  .compat-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
    align-items: center;
  }

  .compat-text h2::after {
    margin-left: 0;
  }

  .compat-text p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin: 20px 0 0;
  }

  .compat-list {
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    overflow: hidden;
    background: rgba(13, 27, 42, 0.6);
  }

  .compat-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-soft);
  }

  .compat-row:last-child {
    border-bottom: none;
  }

  .compat-label {
    color: var(--text-muted);
    font-size: 14px;
    flex-shrink: 0;
  }

  .compat-value {
    color: var(--text-strong);
    font-size: 15px;
    font-weight: 500;
    text-align: right;
  }

  /* ===== 操作流程 ===== */
  .section-flow {
    padding: 96px 0;
    background: rgba(13, 27, 42, 0.5);
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
  }

  .step-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
  }

  .step-item {
    background: rgba(13, 27, 42, 0.72);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    padding: 28px 24px;
    transition: all 0.25s ease;
  }

  .step-item:hover {
    border-color: rgba(0, 184, 217, 0.35);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
  }

  .step-num {
    font-size: 34px;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0, 184, 217, 0.6);
    line-height: 1;
    margin-bottom: 20px;
  }

  .step-item h3 {
    font-size: 18px;
    color: var(--text-strong);
    margin-bottom: 10px;
  }

  .step-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
  }

  /* ===== FAQ ===== */
  .section-faq {
    padding: 96px 0;
  }

  .faq-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 64px;
    align-items: start;
  }

  .faq-side h2::after {
    margin-left: 0;
  }

  .faq-side p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.8;
    margin: 20px 0 20px;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s ease;
  }

  .faq-item:hover {
    border-color: rgba(0, 184, 217, 0.28);
  }

  .faq-question {
    background: none;
    border: none;
    width: 100%;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    color: var(--text-strong);
    font-size: 16px;
    font-weight: 500;
    text-align: left;
    transition: color 0.2s ease;
  }

  .faq-question:hover {
    color: var(--primary);
  }

  .faq-question i {
    color: var(--text-muted);
    font-size: 14px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
  }

  .faq-question:not(.collapsed) i {
    transform: rotate(180deg);
  }

  .faq-answer {
    padding: 0 24px 24px;
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.8;
  }

  /* ===== CTA ===== */
  .section-cta {
    padding: 96px 0 60px;
  }

  .cta-box {
    position: relative;
    background: linear-gradient(135deg, rgba(0, 184, 217, 0.16), rgba(0, 144, 255, 0.08)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-radius: 16px;
    padding: 64px 32px;
    text-align: center;
    border: 1px solid rgba(0, 184, 217, 0.25);
    overflow: hidden;
  }

  .cta-box::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(6, 12, 22, 0.62);
  }

  .cta-box h2,
  .cta-box p,
  .cta-box .btn-primary-lg {
    position: relative;
    z-index: 2;
  }

  .cta-box h2 {
    font-size: 30px;
    font-weight: 600;
    color: var(--text-strong);
    margin-bottom: 12px;
  }

  .cta-box p {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 28px;
  }

  .btn-primary-lg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border: none;
    text-decoration: none;
    box-shadow: 0 0 28px rgba(0, 184, 217, 0.35);
    transition: all 0.25s ease;
  }

  .btn-primary-lg:hover {
    color: #fff;
    box-shadow: 0 0 40px rgba(0, 184, 217, 0.6);
    transform: translateY(-2px);
  }

  .btn-primary-lg:active {
    transform: translateY(0);
  }

  /* ===== 页脚 ===== */
  .site-footer {
    background: var(--bg-footer);
    border-top: 1px solid var(--border-soft);
    padding: 64px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border-soft);
  }

  .footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin-top: 16px;
  }

  .footer-title {
    color: var(--text-strong);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-links a {
    color: var(--text-muted);
    font-size: 13px;
    transition: color 0.2s ease;
  }

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

  .footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 12px;
  }

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

  .footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: center;
  }

  .footer-bottom p {
    color: rgba(230, 240, 248, 0.5);
    font-size: 12px;
    text-align: center;
    margin: 0;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 991.98px) {
    .intro-wrap {
      grid-template-columns: 1fr;
      gap: 48px;
    }

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

    .topic-card-lg {
      grid-column: span 2;
      grid-row: auto;
    }

    .topic-card-lg img {
      height: 260px;
    }

    .compat-grid {
      grid-template-columns: 1fr;
      gap: 48px;
    }

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

    .faq-layout {
      grid-template-columns: 1fr;
      gap: 40px;
    }

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

    .section-intro,
    .section-topics,
    .section-compat,
    .section-flow,
    .section-faq {
      padding: 72px 0;
    }
  }

  @media (max-width: 767.98px) {
    .category-hero {
      min-height: 380px;
      padding: 64px 0;
    }

    .category-hero h1 {
      font-size: 30px;
    }

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

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

    .topic-card-lg {
      grid-column: auto;
    }

    .topic-card-lg img {
      height: 220px;
    }

    .topic-card:not(.topic-card-lg) img {
      height: 180px;
    }

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

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

  @media (max-width: 575.98px) {
    .logo-text {
      font-size: 16px;
    }

    .header-actions {
      gap: 8px;
    }

    .btn-ghost,
    .btn-primary-mini {
      padding: 7px 14px;
      font-size: 13px;
    }

    .section-intro,
    .section-topics,
    .section-compat,
    .section-flow,
    .section-faq,
    .section-cta {
      padding: 56px 0;
    }

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

    .compat-row {
      flex-direction: column;
      align-items: flex-start;
      gap: 6px;
    }

    .compat-value {
      text-align: left;
    }

    .cta-box {
      padding: 48px 24px;
    }

    .cta-box h2 {
      font-size: 24px;
    }

    .btn-primary-lg {
      width: 100%;
      padding: 14px 24px;
    }
  }

/* roulang page: article */
:root {
    --primary: #00B8D9;
    --primary-dark: #0090FF;
    --primary-glow: rgba(0, 184, 217, 0.35);
    --accent: #E8A33D;
    --bg-body: #060C16;
    --bg-card: #0D1B2A;
    --bg-deep: #040A12;
    --border-light: rgba(255, 255, 255, 0.08);
    --text-main: #E8EDF3;
    --text-body: #B8C4D0;
    --text-weak: rgba(232, 237, 243, 0.6);
    --radius-card: 12px;
    --radius-btn: 10px;
    --radius-badge: 999px;
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 24px rgba(0, 184, 217, 0.35);
    --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --space-section: 96px;
    --space-section-mobile: 56px;
    --header-height: 100px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-stack);
    background: var(--bg-body);
    color: var(--text-body);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #00B8D9 0%, #0090FF 100%);
    color: #fff;
    border: none;
    border-radius: var(--radius-btn);
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    transition: all 0.3s ease;
    cursor: pointer;
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 0 34px rgba(0, 184, 217, 0.5); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 0 20px rgba(0, 184, 217, 0.3); }
.btn-primary:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-btn);
    padding: 10px 20px;
    font-size: 14px;
    transition: all 0.3s ease;
    cursor: pointer;
}
.btn-ghost:hover { color: var(--primary); border-color: var(--primary); background: rgba(0, 184, 217, 0.08); }
.btn-ghost:active { transform: scale(0.98); }
.btn-ghost:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.btn-primary-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #00B8D9, #0090FF);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 0 14px rgba(0, 184, 217, 0.3);
}
.btn-primary-mini:hover { color: #fff; box-shadow: 0 0 22px rgba(0, 184, 217, 0.5); transform: translateY(-1px); }
.btn-primary-mini:active { transform: scale(0.98); }
.btn-primary-mini:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(6, 12, 22, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-light);
}

.header-top { height: 56px; }
.header-top .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.5px;
}
.brand-logo:hover { color: var(--text-main); }

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, #00B8D9, #0090FF);
    color: #fff;
    font-size: 16px;
    box-shadow: 0 0 18px rgba(0, 184, 217, 0.4);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-nav {
    height: 44px;
    border-top: 1px solid var(--border-light);
}
.header-nav .container {
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-channels {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 28px;
    overflow-x: auto;
    scrollbar-width: none;
    white-space: nowrap;
    flex: 1;
}
.nav-channels::-webkit-scrollbar { display: none; }

.nav-link {
    display: inline-flex;
    align-items: center;
    height: 44px;
    color: var(--text-body);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: color 0.25s ease;
}
.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    border-radius: 2px;
    opacity: 0;
    transform: scaleX(0.6);
    transition: all 0.25s ease;
}
.nav-link:hover { color: var(--text-main); }
.nav-link:hover::after { opacity: 0.6; transform: scaleX(1); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after { opacity: 1; transform: scaleX(1); }
.nav-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; border-radius: 4px; }

/* ===== Breadcrumb ===== */
.breadcrumb-area {
    margin-top: var(--header-height);
    padding: 18px 0;
    background: linear-gradient(180deg, rgba(13, 27, 42, 0.6), rgba(6, 12, 22, 0));
    border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
    margin: 0;
    padding: 0;
    font-size: 13px;
}
.breadcrumb-item { color: var(--text-weak); }
.breadcrumb-item a { color: var(--text-weak); transition: color 0.2s ease; }
.breadcrumb-item a:hover { color: var(--primary); }
.breadcrumb-item.active {
    color: rgba(232, 237, 243, 0.8);
    max-width: 260px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.breadcrumb-item + .breadcrumb-item::before { color: rgba(255, 255, 255, 0.25); }

/* ===== Article Page ===== */
.article-page {
    padding: 48px 0 var(--space-section);
}

.article-wrapper {
    max-width: 760px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-light);
}

.article-header h1 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.35;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-weak);
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.meta-item i { font-size: 14px; color: var(--primary); }

.meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 14px;
    border-radius: var(--radius-badge);
    background: rgba(0, 184, 217, 0.12);
    border: 1px solid rgba(0, 184, 217, 0.25);
    color: var(--primary);
    font-size: 12px;
    font-weight: 500;
}

/* ===== Article Content ===== */
.article-content {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-body);
}
.article-content p { margin-bottom: 1.4em; }
.article-content h2 {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-main);
    margin: 1.6em 0 0.7em;
    padding-bottom: 0.4em;
    border-bottom: 1px solid var(--border-light);
}
.article-content h3 {
    font-size: 21px;
    font-weight: 600;
    color: var(--text-main);
    margin: 1.4em 0 0.6em;
}
.article-content h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin: 1.2em 0 0.5em;
}
.article-content ul,
.article-content ol { margin: 0 0 1.4em; padding-left: 1.6em; }
.article-content ul li,
.article-content ol li { margin-bottom: 0.45em; }
.article-content ul li::marker { color: var(--primary); }
.article-content a { color: var(--primary); border-bottom: 1px solid rgba(0, 184, 217, 0.3); transition: all 0.2s ease; }
.article-content a:hover { color: #fff; border-bottom-color: #fff; }
.article-content blockquote {
    border-left: 3px solid var(--primary);
    background: rgba(0, 184, 217, 0.07);
    padding: 14px 20px;
    margin: 1.6em 0;
    border-radius: 0 8px 8px 0;
    color: rgba(232, 237, 243, 0.85);
}
.article-content blockquote p { margin-bottom: 0.4em; }
.article-content img { border-radius: 8px; margin: 1.6em auto; box-shadow: var(--shadow-card); }
.article-content pre {
    background: #0A1622;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 18px 20px;
    overflow-x: auto;
    margin: 1.4em 0;
    font-size: 14px;
    line-height: 1.6;
    color: #9FD8E6;
}
.article-content code {
    font-family: SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(0, 184, 217, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
    color: var(--primary);
}
.article-content pre code { background: transparent; padding: 0; color: inherit; font-size: 14px; }
.article-content hr { border: 0; border-top: 1px solid var(--border-light); margin: 2em 0; }

/* ===== Not Found ===== */
.not-found {
    text-align: center;
    padding: 80px 24px;
}
.not-found-icon {
    font-size: 48px;
    color: var(--text-weak);
    margin-bottom: 16px;
}
.not-found h3 { font-size: 22px; color: var(--text-main); margin-bottom: 10px; }
.not-found p { color: var(--text-weak); margin-bottom: 24px; }

/* ===== Article Bottom ===== */
.article-bottom {
    padding: 32px 0 0;
    margin-top: 32px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ===== Related Section ===== */
.related-section {
    padding: var(--space-section) 0;
    background: linear-gradient(180deg, transparent, rgba(13, 27, 42, 0.4) 50%, transparent);
}

.section-header {
    text-align: center;
    margin-bottom: 44px;
}
.section-header h2 {
    font-size: 30px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 10px;
}
.section-header p { color: var(--text-weak); font-size: 15px; }

.related-grid { margin-top: 24px; }

.related-card {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    padding: 16px;
    gap: 16px;
    height: 100%;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}
.related-card::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    opacity: 0;
    transition: opacity 0.3s ease;
}
.related-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 184, 217, 0.35);
    box-shadow: 0 8px 30px rgba(0, 184, 217, 0.15);
}
.related-card:hover::after { opacity: 1; }

.related-thumb {
    width: 92px;
    height: 68px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}
.related-thumb img { width: 100%; height: 100%; object-fit: cover; }

.related-body {
    flex: 1;
    min-width: 0;
}
.related-body h3 {
    font-size: 16px;
    color: var(--text-main);
    font-weight: 600;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.related-body p {
    font-size: 13px;
    color: var(--text-weak);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.badge-category {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-badge);
    background: rgba(232, 163, 61, 0.12);
    border: 1px solid rgba(232, 163, 61, 0.3);
    color: var(--accent);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ===== CTA ===== */
.cta-section {
    padding: 0 0 var(--space-section);
}
.cta-inner {
    background: linear-gradient(135deg, rgba(0, 184, 217, 0.12), rgba(0, 144, 255, 0.05)), var(--bg-card);
    border: 1px solid rgba(0, 184, 217, 0.2);
    border-radius: 16px;
    padding: 44px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: "";
    position: absolute;
    top: -80px;
    right: -80px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 184, 217, 0.2), transparent 70%);
    pointer-events: none;
}
.cta-text h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}
.cta-text p { font-size: 15px; color: var(--text-weak); margin: 0; }

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border-light);
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .brand-logo { margin-bottom: 14px; }
.footer-brand p {
    font-size: 13px;
    color: var(--text-weak);
    line-height: 1.8;
    margin-top: 14px;
    max-width: 320px;
}
.footer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 16px;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 13px;
    color: var(--text-body);
    transition: color 0.2s ease;
}
.footer-links a:hover { color: var(--primary); }
.footer-contact {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 13px;
    color: var(--text-body);
}
.footer-contact li { display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: var(--primary); font-size: 12px; width: 16px; text-align: center; }
.footer-bottom {
    border-top: 1px solid var(--border-light);
    padding: 20px 0;
    text-align: center;
}
.footer-bottom p { margin: 0; font-size: 12px; color: var(--text-weak); }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .article-header h1 { font-size: 31px; }
}

@media (max-width: 767.98px) {
    :root { --space-section: 56px; }
    .header-top { height: 52px; }
    .header-nav { height: 42px; }
    .nav-channels { gap: 20px; }
    .brand-logo { font-size: 16px; }
    .logo-icon { width: 30px; height: 30px; font-size: 14px; }
    .breadcrumb-area { margin-top: 94px; padding: 14px 0; }
    .article-page { padding: 30px 0 48px; }
    .article-header h1 { font-size: 26px; line-height: 1.4; }
    .article-content { font-size: 16px; line-height: 1.85; }
    .cta-inner { padding: 32px 24px; flex-direction: column; text-align: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .related-card { flex-direction: column; align-items: flex-start; }
    .related-thumb { width: 100%; height: 150px; }
    .related-card .badge-category { display: none; }
}

@media (max-width: 575.98px) {
    .header-actions .btn-ghost { display: none; }
    .header-actions .btn-primary-mini { padding: 6px 14px; font-size: 12px; }
    .article-meta { gap: 8px; flex-direction: column; }
    .article-header { margin-bottom: 28px; padding-bottom: 24px; }
    .article-bottom { flex-direction: column; gap: 12px; }
    .breadcrumb-item.active { max-width: 160px; }
    .section-header h2 { font-size: 25px; }
}