/* roulang page: index */
:root {
  --clr-bg: #0b0f1a;
  --clr-bg-alt: #0e1422;
  --clr-surface: #131a2b;
  --clr-surface-light: #1b2337;
  --clr-card: rgba(20, 28, 45, 0.8);
  --clr-primary: #00e5ff;
  --clr-primary-dark: #0ba5c4;
  --clr-accent: #a855f7;
  --clr-gold: #f5b544;
  --clr-text: #e7ecf3;
  --clr-muted: #94a3b8;
  --clr-border: rgba(255, 255, 255, 0.08);
  --clr-border-light: rgba(0, 229, 255, 0.25);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.55);
  --shadow-neon: 0 0 32px rgba(0, 229, 255, 0.15);
  --transition-fast: all 0.25s ease;
  --transition-slow: all 0.4s ease;
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --header-height: 76px;
}

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

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

body {
  font-family: var(--font-main);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 60% 40% at 20% 0%, rgba(0, 229, 255, 0.07) 0%, transparent 100%),
    radial-gradient(ellipse 50% 40% at 90% 10%, rgba(168, 85, 247, 0.06) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

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

.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 28px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
}

.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-sm {
  padding: 70px 0;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--clr-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 6px 18px;
  border-radius: 100px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.25;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--clr-muted);
  font-size: 17px;
  line-height: 1.75;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 100px;
  transition: var(--transition-fast);
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), #0090a8);
  color: #04121a;
  box-shadow: 0 8px 28px rgba(0, 229, 255, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(0, 229, 255, 0.35);
  color: #04121a;
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  background: rgba(255, 255, 255, 0.03);
}

.btn-outline:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: rgba(0, 229, 255, 0.08);
  transform: translateY(-2px);
}

.btn-ghost-accent {
  border: 1px solid rgba(168, 85, 247, 0.4);
  color: #c084fc;
  background: rgba(168, 85, 247, 0.08);
}

.btn-ghost-accent:hover {
  background: rgba(168, 85, 247, 0.2);
  color: #d8b4fe;
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: #0b0f1a;
}

.btn-light:hover {
  background: #e5e7eb;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 22px;
  font-size: 14px;
}

.btn-lg {
  padding: 17px 42px;
  font-size: 17px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(11, 15, 26, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  z-index: 100;
  transition: var(--transition-fast);
}

.site-header.scrolled {
  background: rgba(7, 10, 18, 0.95);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.header-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: #06121b;
  box-shadow: 0 0 22px rgba(0, 229, 255, 0.3);
}

.brand-name {
  font-size: 20px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.01em;
  background: linear-gradient(90deg, #fff 0%, var(--clr-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item .nav-link {
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--clr-muted);
  border-radius: 100px;
  transition: var(--transition-fast);
}

.nav-item .nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.nav-item.active .nav-link {
  color: var(--clr-primary);
  background: rgba(0, 229, 255, 0.1);
  font-weight: 700;
}

.header-cta {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--clr-border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.nav-toggle .bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--clr-primary);
}

.nav-toggle.open .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 15, 26, 0.55) 0%, rgba(11, 15, 26, 0.75) 60%, var(--clr-bg) 100%),
    linear-gradient(90deg, rgba(11, 15, 26, 0.7) 0%, rgba(11, 15, 26, 0.2) 60%, rgba(11, 15, 26, 0.4) 100%);
  z-index: 1;
}

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

.hero-content {
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 100px;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--clr-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge i {
  font-size: 14px;
}

.hero-title {
  font-size: clamp(44px, 7vw, 84px);
  font-weight: 900;
  line-height: 1.08;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.hero-title .gradient-text {
  background: linear-gradient(120deg, var(--clr-primary) 20%, var(--clr-accent) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 16px;
  font-weight: 500;
}

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  max-width: 640px;
}

.hero-stat-item .hero-stat-num {
  font-size: 32px;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
}

.hero-stat-item .hero-stat-num em {
  font-style: normal;
  font-size: 18px;
  color: var(--clr-primary);
  margin-left: 2px;
}

.hero-stat-item .hero-stat-label {
  font-size: 13px;
  color: var(--clr-muted);
  letter-spacing: 0.04em;
}

/* ===== Features ===== */
.features {
  background: var(--clr-bg-alt);
}

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

.feature-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: var(--transition-slow);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--clr-border-light);
  box-shadow: var(--shadow-md);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--clr-primary);
  margin-bottom: 24px;
  transition: var(--transition-slow);
}

.feature-card:hover .feature-icon {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: var(--shadow-neon);
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--clr-muted);
  line-height: 1.75;
}

/* ===== Category Entry ===== */
.category-entry {
  background: var(--clr-bg);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 300px;
  display: flex;
  align-items: flex-end;
  border: 1px solid var(--clr-border);
  transition: var(--transition-slow);
  background: var(--clr-surface);
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--clr-border-light);
  box-shadow: var(--shadow-lg);
}

.category-card .cat-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
  transition: transform 0.6s ease;
}

.category-card:hover .cat-bg {
  transform: scale(1.06);
}

.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(8, 12, 22, 0.94) 100%);
  z-index: 1;
}

.category-card-content {
  position: relative;
  z-index: 2;
  padding: 30px;
  width: 100%;
}

.category-card-content .cat-tag {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 229, 255, 0.18);
  border: 1px solid rgba(0, 229, 255, 0.35);
  color: var(--clr-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 14px;
  backdrop-filter: blur(5px);
}

.category-card-content h3 {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.category-card-content p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: 18px;
}

.category-card-content .cat-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--clr-primary);
  transition: var(--transition-fast);
}

.category-card-content .cat-link i {
  transition: transform 0.25s ease;
}

.category-card-content .cat-link:hover i {
  transform: translateX(5px);
}

/* ===== News List ===== */
.news-section {
  background: var(--clr-bg-alt);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition-slow);
}

.news-card:hover {
  transform: translateY(-6px);
  border-color: var(--clr-border-light);
  box-shadow: var(--shadow-md);
}

.news-card-top {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.news-card-top img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.news-card:hover .news-card-top img {
  transform: scale(1.06);
}

.news-card-top::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 26, 0.6) 100%);
}

.news-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(0, 229, 255, 0.22);
  border: 1px solid rgba(0, 229, 255, 0.4);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 100px;
  backdrop-filter: blur(8px);
}

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

.news-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition-fast);
}

.news-card:hover .news-card-body h3 {
  color: var(--clr-primary);
}

.news-card-body p {
  font-size: 14px;
  color: var(--clr-muted);
  line-height: 1.75;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--clr-muted);
}

.news-meta i {
  color: var(--clr-primary);
  font-size: 13px;
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 30px;
  background: var(--clr-card);
  border: 1px dashed var(--clr-border);
  border-radius: var(--radius);
  color: var(--clr-muted);
  font-size: 16px;
}

/* ===== Stats ===== */
.stats-section {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
  padding: 110px 0;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 15, 26, 0.92) 30%, rgba(17, 24, 39, 0.82) 100%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}

.stat-block {
  text-align: center;
  padding: 40px 24px;
  background: rgba(19, 26, 43, 0.6);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  transition: var(--transition-slow);
}

.stat-block:hover {
  border-color: rgba(0, 229, 255, 0.3);
  transform: translateY(-5px);
}

.stat-num {
  font-size: 48px;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-num em {
  font-style: normal;
  color: var(--clr-primary);
}

.stat-label {
  font-size: 14px;
  color: var(--clr-muted);
  letter-spacing: 0.06em;
}

.stat-icon {
  font-size: 22px;
  color: var(--clr-gold);
  margin-bottom: 14px;
}

/* ===== Process ===== */
.process {
  background: var(--clr-bg);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.process-step {
  position: relative;
  padding: 40px 32px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  transition: var(--transition-slow);
}

.process-step:hover {
  transform: translateY(-6px);
  border-color: var(--clr-border-light);
  box-shadow: var(--shadow-md);
}

.step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--clr-primary);
  letter-spacing: 0.2em;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-num::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--clr-border);
}

.step-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #c084fc;
  margin-bottom: 20px;
}

.process-step h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.process-step p {
  font-size: 14.5px;
  color: var(--clr-muted);
  line-height: 1.75;
}

.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -18px;
  width: 36px;
  height: 36px;
  border: 2px solid var(--clr-primary);
  border-left: none;
  border-bottom: none;
  transform: translateY(-50%) rotate(45deg);
  border-radius: 4px;
  z-index: 2;
  background: var(--clr-bg);
}

.process-step:last-child::after {
  display: none;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--clr-bg-alt);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item.active {
  border-color: var(--clr-border-light);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  transition: var(--transition-fast);
}

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

.faq-q .faq-icon {
  font-size: 18px;
  color: var(--clr-primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a-inner {
  padding: 0 28px 24px;
  color: var(--clr-muted);
  font-size: 14.5px;
  line-height: 1.85;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-a-inner {
  border-top-color: var(--clr-border);
  padding-top: 18px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 120px 0;
  background: url('/assets/images/backpic/back-3.png') no-repeat center center / cover;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 15, 26, 0.85) 0%, rgba(13, 18, 30, 0.7) 50%, rgba(11, 15, 26, 0.85) 100%);
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(32px, 5vw, 50px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}

.cta-inner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  line-height: 1.8;
}

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

.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ===== Footer ===== */
.site-footer {
  background: #070b14;
  border-top: 1px solid var(--clr-border);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--clr-border);
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-desc {
  font-size: 14px;
  color: var(--clr-muted);
  line-height: 1.8;
  max-width: 380px;
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: 2px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--clr-muted);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-links a i {
  font-size: 12px;
  color: var(--clr-primary);
}

.footer-links a:hover {
  color: var(--clr-primary);
  transform: translateX(3px);
}

.footer-safety {
  background: rgba(0, 229, 255, 0.05);
  border: 1px solid rgba(0, 229, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 18px;
  font-size: 13.5px;
  color: var(--clr-muted);
  line-height: 1.75;
}

.footer-safety strong {
  color: #fff;
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
}

.footer-bottom {
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-domain {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.32);
  letter-spacing: 0.04em;
}

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary), #0090a8);
  color: #04121a;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-fast);
  z-index: 99;
  box-shadow: 0 8px 24px rgba(0, 229, 255, 0.3);
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  transform: translateY(-4px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-step::after {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }
  .header-container {
    padding: 0 20px;
  }
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(7, 10, 18, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 28px;
    gap: 20px;
    border-bottom: 1px solid var(--clr-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.4s ease, opacity 0.3s ease;
    border-radius: 0 0 var(--radius) var(--radius);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  .nav-item {
    width: 100%;
  }
  .nav-item .nav-link {
    display: block;
    width: 100%;
    padding: 12px 16px;
  }
  .header-cta {
    margin: 8px 0 0 0;
    width: 100%;
  }
  .nav-toggle {
    display: flex;
  }
  .hero {
    min-height: auto;
    padding-top: 140px;
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: 40px;
  }
  .hero-subtitle {
    font-size: 17px;
  }
  .hero-desc {
    font-size: 15.5px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-stats {
    gap: 24px;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .cta-actions {
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .stat-num {
    font-size: 36px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .brand-name {
    font-size: 18px;
  }
}

/* roulang page: article */
:root {
            --primary: #7c3aed;
            --primary-dark: #5b21b6;
            --primary-light: #c4b5fd;
            --accent: #22d3ee;
            --accent-warm: #f59e0b;
            --dark-bg: #0b1020;
            --dark-surface: #131a2e;
            --dark-card: #1a2240;
            --bg: #f4f6fb;
            --text: #1e1e2e;
            --text-muted: #6b7280;
            --border: #e5e7eb;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(0,0,0,0.06);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --space-section: 90px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; }
        ul, ol { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

        /* Header */
        .site-header { position: sticky; top: 0; z-index: 1000; background: rgba(11, 16, 32, 0.95); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(255,255,255,0.08); }
        .header-container { max-width: 1280px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
        .brand-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary), var(--accent)); border-radius: 10px; color: #fff; font-size: 0.9rem; box-shadow: 0 4px 12px rgba(124,58,237,0.4); }
        .brand-name { background: linear-gradient(135deg, #fff, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .main-nav { display: flex; align-items: center; gap: 32px; }
        .nav-list { display: flex; align-items: center; gap: 8px; list-style: none; }
        .nav-item { margin: 0; }
        .nav-link { display: inline-block; padding: 8px 16px; color: rgba(255,255,255,0.75); font-size: 0.95rem; font-weight: 500; border-radius: 8px; transition: var(--transition); }
        .nav-link:hover, .nav-item.active .nav-link { color: #fff; background: rgba(124,58,237,0.2); box-shadow: inset 0 0 0 1px rgba(169,139,255,0.3); }
        .header-cta { margin-left: 8px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 0.95rem; font-weight: 600; padding: 12px 24px; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: var(--transition); line-height: 1.2; }
        .btn-primary { background: linear-gradient(135deg, var(--primary), #a855f7); color: #fff; box-shadow: 0 4px 16px rgba(124,58,237,0.3); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,0.45); }
        .btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.4); color: #fff; }
        .btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
        .btn-light { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
        .btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .nav-toggle { display: none; background: none; border: none; cursor: pointer; width: 44px; height: 44px; padding: 10px; border-radius: 8px; }
        .nav-toggle .bar { display: block; width: 22px; height: 2px; background: #fff; margin: 5px auto; border-radius: 2px; transition: var(--transition); }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        /* Page Hero */
        .page-hero { position: relative; padding: 70px 0 50px; background: linear-gradient(120deg, #0b1020, #1a1040, #0b1020); color: #fff; overflow: hidden; }
        .page-hero::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.25; }
        .page-hero::after { content: ''; position: absolute; bottom: -40px; right: -40px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(34,211,238,0.2), transparent 70%); }
        .page-hero .container { position: relative; z-index: 2; display: flex; gap: 30px; align-items: center; justify-content: space-between; }
        .page-hero-content { flex: 1; }
        .game-logo { width: 48px; height: 48px; background: rgba(124,58,237,0.3); border: 1px solid rgba(169,139,255,0.3); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin: 20px auto 0; font-size: 1.5rem; color: var(--accent); }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px; background: rgba(124,58,237,0.2); border: 1px solid rgba(169,139,255,0.3); border-radius: 30px; color: #a78bfa; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 20px; }
        .page-hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.3; margin-bottom: 18px; }
        .page-hero p { font-size: 1.1rem; color: rgba(255,255,255,0.75); max-width: 600px; }
        .hero-chip { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.1); border-radius: 30px; padding: 4px 14px; font-size: 0.75rem; color: rgba(255,255,255,0.7); }
        .hero-chip i { color: var(--accent); }

        /* Article layout */
        .article-wrap { padding: 60px 0 90px; }
        .article-grid { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
        .article-main { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
        .article-header { padding: 40px 40px 24px; }
        .article-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 8px; }
        .badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 30px; font-size: 0.78rem; font-weight: 600; background: rgba(124,58,237,0.1); color: var(--primary); border: 1px solid rgba(124,58,237,0.2); }
        .badge-dark { background: rgba(34,211,238,0.1); color: #0e7490; border-color: rgba(34,211,238,0.2); }
        .meta-item { display: inline-flex; align-items: center; gap: 6px; color: var(--text-muted); font-size: 0.85rem; }
        .meta-item i { color: var(--primary); }
        .article-body { padding: 24px 40px 40px; font-size: 1.02rem; }
        .article-body p { margin-bottom: 20px; color: #374151; }
        .article-body h2 { font-size: 1.6rem; font-weight: 700; margin: 36px 0 16px; color: #111827; }
        .article-body h3 { font-size: 1.3rem; font-weight: 700; margin: 28px 0 14px; color: #111827; }
        .article-body ul { list-style: none; margin-bottom: 20px; }
        .article-body ul li { position: relative; padding-left: 28px; margin-bottom: 10px; color: #374151; }
        .article-body ul li::before { content: '\f058'; font-family: 'Font Awesome 6 Free'; font-weight: 900; position: absolute; left: 0; color: var(--primary); }
        .article-body img { border-radius: var(--radius); margin: 24px 0; }
        .article-body blockquote { border-left: 4px solid var(--primary); padding: 16px 20px; background: #faf5ff; border-radius: 0 10px 10px 0; margin: 24px 0; color: #4c1d95; }
        .article-tags { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }
        .tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; background: #f1f5f9; border-radius: 30px; font-size: 0.8rem; color: var(--text-muted); border: 1px solid var(--border); transition: var(--transition); }
        .tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(124,58,237,0.05); }
        .article-share { display: flex; align-items: center; gap: 10px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
        .share-btn { width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: #f1f5f9; color: var(--text-muted); transition: var(--transition); }
        .share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .price-compare { background: #faf5ff; border-radius: var(--radius-sm); padding: 15px; margin: 20px 0; }
        .team-group { background: linear-gradient(to right, #efefff, #fcf0ff); padding: 20px; border-radius: var(--radius-sm); margin: 20px 0; }
        .data-note { background: #f0f9ff; border-radius: var(--radius-sm); padding: 15px; margin: 20px 0; border-left: 4px solid #38bdf8; }

        /* Sidebar */
        .article-sidebar { display: flex; flex-direction: column; gap: 24px; }
        .side-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; border: 1px solid var(--border); }
        .side-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
        .side-card .side-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
        .side-card .side-title i { color: var(--primary); margin-right: 8px; }
        .side-list { list-style: none; }
        .side-list li { margin-bottom: 12px; }
        .side-list a { display: flex; gap: 12px; align-items: flex-start; color: var(--text); font-size: 0.92rem; line-height: 1.5; transition: var(--transition); padding: 8px; border-radius: 8px; }
        .side-list a:hover { background: #f1f5f9; color: var(--primary); }
        .side-list a span:first-child { font-weight: 700; color: var(--primary); }
        .side-list a:hover span:first-child { color: var(--primary); }
        .side-card .btn-block { width: 100%; margin-bottom: 12px; }
        .side-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
        .side-stats-item { background: #f1f5f9; border-radius: 8px; padding: 12px 10px; text-align: center; }
        .side-stats-item .num { font-size: 1.3rem; font-weight: 800; color: var(--primary); }
        .side-stats-item .label { font-size: 0.75rem; color: var(--text-muted); }
        .side-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .side-tags a { display: inline-flex; align-items: center; gap: 4px; font-size: 0.8rem; background: #f1f5f9; padding: 5px 12px; border-radius: 30px; color: var(--text-muted); transition: var(--transition); }
        .side-tags a:hover { background: var(--primary); color: #fff; }

        /* CTA section */
        .cta-section { background: linear-gradient(135deg, var(--primary), #a855f7, #6366f1); padding: 70px 0; color: #fff; text-align: center; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 32px; }
        .cta-btn-wrap { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-group { margin-top: 30px; display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
        .cta-icon-box { background: rgba(255,255,255,0.1); padding: 20px 24px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.2); min-width: 120px; }
        .cta-icon-box i { font-size: 1.8rem; margin-bottom: 8px; display: block; }
        .cta-icon-box span { font-size: 0.85rem; }
        .cta-icon-box:hover { background: rgba(255,255,255,0.2); }

        /* FAQ */
        .faq-section { padding: var(--space-section) 0; background: var(--bg); }
        .faq-section .section-title { text-align: center; margin-bottom: 50px; }
        .faq-section .section-title h2 { font-size: 2.2rem; font-weight: 800; }
        .faq-section .section-title p { color: var(--text-muted); margin-top: 8px; }
        .faq-grid { max-width: 860px; margin: 0 auto; display: grid; gap: 16px; }
        .faq-item { background: #fff; border-radius: var(--radius-sm); box-shadow: var(--shadow); overflow: hidden; }
        .faq-q { width: 100%; text-align: left; padding: 20px 24px; background: none; border: none; font-size: 1rem; font-weight: 600; color: var(--text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
        .faq-q:hover { color: var(--primary); }
        .faq-q i { font-size: 1.2rem; transition: var(--transition); color: var(--primary); }
        .faq-item[open] .faq-q i { transform: rotate(180deg); }
        .faq-a { padding: 0 24px 20px; color: var(--text-muted); font-size: 0.95rem; }

        /* Footer */
        .site-footer { background: #0b1020; color: rgba(255,255,255,0.75); padding: 60px 0 0; margin-top: 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; }
        .footer-brand .brand { font-size: 1.3rem; }
        .footer-desc { font-size: 0.92rem; color: rgba(255,255,255,0.55); margin-top: 14px; line-height: 1.7; }
        .footer-title { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: rgba(255,255,255,0.6); font-size: 0.92rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
        .footer-links a:hover { color: var(--accent); padding-left: 4px; }
        .footer-safety { background: rgba(255,255,255,0.04); border-radius: var(--radius-sm); padding: 16px; font-size: 0.88rem; color: rgba(255,255,255,0.6); line-height: 1.6; border: 1px solid rgba(255,255,255,0.06); }
        .footer-safety strong { display: block; color: #fbbf24; margin-bottom: 8px; }
        .footer-safety i { margin-right: 4px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding: 20px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
        .footer-bottom a { color: var(--accent); }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid { grid-template-columns: 1fr; }
            .page-hero { padding: 50px 0; }
            .page-hero h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            .site-header { height: auto; min-height: 64px; }
            .header-container { flex-wrap: wrap; height: auto; padding: 0 16px; }
            .nav-toggle { display: block; }
            .main-nav { display: none; width: 100%; flex-direction: column; gap: 16px; padding: 16px 0 20px; border-top: 1px solid rgba(255,255,255,0.08); }
            .main-nav.open { display: flex; }
            .nav-list { flex-direction: column; gap: 4px; width: 100%; }
            .nav-item { width: 100%; }
            .nav-link { display: block; width: 100%; padding: 12px 16px; }
            .header-cta { width: 100%; margin: 8px 0 0; }
            .page-hero h1 { font-size: 1.8rem; }
            .page-hero { text-align: center; }
            .hero-badge { justify-content: center; }
            .article-header { padding: 24px 20px; }
            .article-body { padding: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; text-align: left; }
            .cta-section h2 { font-size: 1.6rem; }
            .btn { width: 100%; }
            .faq-q { font-size: 0.95rem; padding: 16px 18px; }
            .faq-a { padding: 0 18px 16px; }
            .side-card { padding: 20px; }
        }
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 1.5rem; }
            .container { padding: 0 16px; }
            .side-stats { grid-template-columns: 1fr 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-meta { gap: 8px; flex-wrap: wrap; }
        }
        @media (max-width: 420px) {
            .side-stats { grid-template-columns: 1fr; }
            .brand-name { font-size: 1.1rem; }
        }

/* roulang page: category1 */
/* ========= 设计变量 ========= */
    :root {
      --bg-dark: #070b12;
      --bg-panel: #0d1420;
      --bg-card: #111a28;
      --bg-deep: #05070c;
      --accent: #00e5ff;
      --accent-2: #ffd400;
      --accent-blue: #4f7dff;
      --text-main: #dce6f2;
      --text-muted: #8b9bb5;
      --text-heading: #ffffff;
      --border-light: rgba(255, 255, 255, 0.09);
      --border-accent: rgba(0, 229, 255, 0.4);
      --radius-lg: 18px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.35);
      --shadow-accent: 0 0 24px rgba(0, 229, 255, 0.25);
      --space-section: 96px;
      --space-card: 24px;
      --transition: all 0.3s ease;
    }

    /* ========= 基础 Reset / Base ========= */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      font-size: 16px;
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    body.no-scroll {
      overflow: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    ul,
    ol {
      list-style: none;
    }

    button,
    input,
    textarea {
      font-family: inherit;
      outline: none;
      border: none;
      background: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========= 导航 ========= */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(7, 11, 18, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border-light);
      transition: var(--transition);
    }

    .site-header.is-scrolled {
      background: rgba(4, 7, 12, 0.95);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(255, 212, 0, 0.12));
      border: 1px solid var(--border-accent);
      color: var(--accent);
      font-size: 20px;
      box-shadow: var(--shadow-accent);
    }

    .brand-name {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-heading);
      letter-spacing: 0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      display: block;
      padding: 10px 18px;
      color: var(--text-muted);
      font-weight: 500;
      border-radius: 10px;
      transition: var(--transition);
      font-size: 15px;
      letter-spacing: 0.3px;
    }

    .nav-link:hover,
    .nav-link:focus {
      color: var(--text-heading);
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-item.active .nav-link {
      color: var(--accent);
      background: rgba(0, 229, 255, 0.1);
      box-shadow: inset 0 0 0 1px var(--border-accent);
    }

    .header-cta {
      margin-left: 4px;
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      background: rgba(255, 255, 255, 0.04);
      cursor: pointer;
      transition: var(--transition);
    }

    .nav-toggle .bar {
      width: 22px;
      height: 2px;
      background: var(--text-heading);
      border-radius: 2px;
      transition: var(--transition);
    }

    .nav-toggle.is-open .bar:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.is-open .bar:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.is-open .bar:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ========= 按钮 ========= */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 26px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1.4;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), #3fa7ff);
      color: #00202a;
      box-shadow: 0 4px 18px rgba(0, 229, 255, 0.3);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      transform: translateY(-2px);
      box-shadow: 0 8px 26px rgba(0, 229, 255, 0.45);
      color: #001219;
    }

    .btn-secondary {
      background: rgba(255, 212, 0, 0.1);
      border-color: var(--accent-2);
      color: var(--accent-2);
    }

    .btn-secondary:hover,
    .btn-secondary:focus {
      background: var(--accent-2);
      color: #1a1a00;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 212, 0, 0.3);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--text-main);
    }

    .btn-ghost:hover,
    .btn-ghost:focus {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--accent);
      color: var(--accent);
    }

    .btn-sm {
      padding: 9px 16px;
      font-size: 14px;
      border-radius: 10px;
    }

    .btn-lg {
      padding: 16px 34px;
      font-size: 17px;
      border-radius: 14px;
    }

    .btn:focus-visible,
    .nav-link:focus-visible,
    .accordion-title:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
    }

    /* ========= Hero / Banner ========= */
    .page-banner {
      position: relative;
      padding: 160px 0 80px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(79, 125, 255, 0.04)), var(--bg-dark);
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }

    .page-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(5, 7, 12, 0.85), rgba(5, 7, 12, 0.55), rgba(5, 7, 12, 0.75));
    }

    .page-banner .container {
      position: relative;
      z-index: 2;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 22px;
      flex-wrap: wrap;
    }

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

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

    .breadcrumb .separator {
      color: rgba(255, 255, 255, 0.3);
    }

    .banner-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: 100px;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid var(--border-accent);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .banner-title {
      font-size: clamp(36px, 5vw, 58px);
      font-weight: 800;
      color: var(--text-heading);
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .banner-title span {
      color: var(--accent);
      position: relative;
    }

    .banner-subtitle {
      font-size: clamp(16px, 1.6vw, 19px);
      color: var(--text-muted);
      max-width: 640px;
      margin-bottom: 28px;
      line-height: 1.8;
    }

    .banner-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .banner-stats {
      display: flex;
      align-items: center;
      gap: 32px;
      flex-wrap: wrap;
      margin-top: 44px;
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .stat-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .stat-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--border-accent);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    .stat-value {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-heading);
      line-height: 1.2;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ========= 通用区块 ========= */
    .section {
      padding: var(--space-section) 0;
    }

    .section-panel {
      background: var(--bg-panel);
    }

    .section-head {
      max-width: 720px;
      margin-bottom: 48px;
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      margin-bottom: 14px;
    }

    .section-head .section-title {
      font-size: clamp(28px, 3.5vw, 40px);
      font-weight: 800;
      color: var(--text-heading);
      line-height: 1.25;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    .section-center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }

    /* ========= 卡片系统 ========= */
    .card-simple {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: var(--space-card);
      height: 100%;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .card-simple::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--accent), transparent);
      opacity: 0;
      transition: var(--transition);
    }

    .card-simple:hover {
      transform: translateY(-6px);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-card);
    }

    .card-simple:hover::after {
      opacity: 1;
    }

    .card-icon {
      width: 56px;
      height: 56px;
      border-radius: 14px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--border-accent);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .card-text {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.75;
      margin-bottom: 16px;
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-size: 14px;
      font-weight: 600;
      transition: var(--transition);
    }

    .card-link:hover {
      gap: 10px;
      color: var(--text-heading);
    }

    /* ========= 封面卡片 ========= */
    .cover-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      overflow: hidden;
      height: 100%;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .cover-card:hover {
      transform: translateY(-6px);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-card);
    }

    .cover-media {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 10;
    }

    .cover-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .cover-card:hover .cover-media img {
      transform: scale(1.06);
    }

    .cover-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(5, 7, 12, 0.7));
    }

    .cover-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
      background: rgba(0, 229, 255, 0.9);
      color: #00202a;
      font-size: 12px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 100px;
    }

    .cover-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .cover-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .cover-body p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.75;
      flex: 1;
    }

    .cover-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
      color: var(--text-muted);
      font-size: 13px;
    }

    .cover-meta i {
      color: var(--accent);
      margin-right: 4px;
    }

    /* ========= 步骤/流程 ========= */
    .steps-wrap {
      position: relative;
      counter-reset: step-counter;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 28px;
      height: 100%;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-card);
    }

    .step-number {
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(0, 229, 255, 0.05));
      border: 1px solid var(--border-accent);
      color: var(--accent);
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 20px;
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
    }

    .step-card p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.75;
      margin-bottom: 0;
    }

    .step-card ul {
      margin-top: 12px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .step-card li {
      color: var(--text-muted);
      font-size: 14px;
      display: flex;
      gap: 8px;
      align-items: flex-start;
    }

    .step-card li i {
      color: var(--accent);
      margin-top: 4px;
      font-size: 12px;
    }

    /* ========= 内容列表 ========= */
    .content-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .content-item {
      display: flex;
      align-items: flex-start;
      gap: 18px;
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      transition: var(--transition);
    }

    .content-item:hover {
      border-color: var(--border-accent);
      transform: translateX(6px);
    }

    .content-item-icon {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      border-radius: 12px;
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid var(--border-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    .content-item-body {
      flex: 1;
    }

    .content-item-body h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 6px;
      transition: var(--transition);
    }

    .content-item:hover .content-item-body h4 {
      color: var(--accent);
    }

    .content-item-body p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .content-tag {
      font-size: 12px;
      color: var(--accent-2);
      background: rgba(255, 212, 0, 0.1);
      border: 1px solid rgba(255, 212, 0, 0.25);
      padding: 3px 10px;
      border-radius: 100px;
      flex-shrink: 0;
      margin-top: 4px;
    }

    /* ========= FAQ ========= */
    .faq-wrap {
      max-width: 780px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      transition: var(--transition);
    }

    .faq-item:hover,
    .faq-item.is-active {
      border-color: var(--border-accent);
    }

    .faq-header {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-heading);
      background: transparent;
      text-align: left;
    }

    .faq-header:hover {
      color: var(--accent);
    }

    .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--border-accent);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      transition: var(--transition);
    }

    .faq-item.is-active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-body {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
    }

    .faq-body.show {
      display: block;
    }

    /* ========= CTA ========= */
    .cta-panel {
      position: relative;
      border-radius: 24px;
      padding: 64px;
      overflow: hidden;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(255, 212, 0, 0.08)), var(--bg-panel);
      border: 1px solid rgba(255, 255, 255, 0.1);
      text-align: center;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(7, 11, 18, 0.78);
    }

    .cta-panel .container-cta {
      position: relative;
      z-index: 2;
    }

    .cta-panel h2 {
      font-size: clamp(28px, 3.5vw, 42px);
      font-weight: 800;
      color: var(--text-heading);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .cta-panel p {
      color: var(--text-muted);
      max-width: 560px;
      margin: 0 auto 28px;
      font-size: 16px;
      line-height: 1.8;
    }

    .cta-domain {
      display: inline-block;
      margin-bottom: 26px;
      padding: 12px 26px;
      border-radius: 100px;
      background: rgba(0, 229, 255, 0.08);
      border: 1px dashed var(--border-accent);
      color: var(--accent);
      font-weight: 700;
      font-size: 17px;
      letter-spacing: 1px;
    }

    .cta-buttons {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 1fr;
      gap: 48px;
      padding-bottom: 44px;
    }

    .footer-brand .brand {
      margin-bottom: 16px;
    }

    .footer-desc {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
      max-width: 360px;
      margin-top: 14px;
    }

    .footer-title {
      color: var(--text-heading);
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      letter-spacing: 1px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: var(--text-muted);
      font-size: 14px;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .footer-links a:hover {
      color: var(--accent);
      padding-left: 4px;
    }

    .footer-links i {
      font-size: 11px;
      color: var(--accent);
    }

    .footer-safety {
      background: rgba(255, 212, 0, 0.05);
      border: 1px solid rgba(255, 212, 0, 0.15);
      border-radius: var(--radius-md);
      padding: 18px;
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .footer-safety strong {
      display: block;
      color: var(--accent-2);
      margin-bottom: 6px;
      font-size: 14px;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 22px 0;
      border-top: 1px solid var(--border-light);
      color: var(--text-muted);
      font-size: 13px;
      flex-wrap: wrap;
    }

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

    .footer-domain {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 100px;
      background: rgba(0, 229, 255, 0.08);
      color: var(--accent);
      font-weight: 600;
    }

    /* ========= 响应式 ========= */
    @media (max-width: 1024px) {
      :root {
        --space-section: 72px;
      }

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

      .footer-brand {
        grid-column: span 2;
      }
    }

    @media (max-width: 768px) {
      .header-container {
        height: 64px;
        padding: 0 18px;
      }

      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        height: calc(100vh - 64px);
        background: rgba(5, 7, 12, 0.98);
        backdrop-filter: blur(20px);
        padding: 40px 24px;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 20px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        border-top: 1px solid var(--border-light);
      }

      .main-nav.is-open {
        transform: translateX(0);
      }

      .nav-list {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 8px;
      }

      .nav-link {
        padding: 14px 18px;
        font-size: 17px;
        border-radius: 12px;
      }

      .header-cta {
        width: 100%;
        margin-top: 16px;
      }

      .nav-toggle {
        display: flex;
      }

      .page-banner {
        padding: 120px 0 60px;
      }

      .banner-stats {
        gap: 20px;
      }

      .section {
        padding: 60px 0;
      }

      .cta-panel {
        padding: 40px 24px;
        border-radius: 18px;
      }

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

      .footer-brand {
        grid-column: span 1;
      }

      .content-item {
        flex-wrap: wrap;
        gap: 12px;
      }

      .content-tag {
        margin-left: 56px;
      }

      .footer-bottom {
        flex-direction: column;
        justify-content: center;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .brand-name {
        font-size: 18px;
      }

      .brand-icon {
        width: 36px;
        height: 36px;
        font-size: 17px;
        border-radius: 10px;
      }

      .page-banner {
        padding: 100px 0 48px;
      }

      .banner-actions .btn {
        width: 100%;
      }

      .banner-stats {
        flex-direction: column;
        align-items: flex-start;
      }

      .stat-item {
        width: 100%;
      }

      .section {
        padding: 48px 0;
      }

      .section-head {
        margin-bottom: 32px;
      }

      .cta-panel {
        padding: 32px 18px;
      }

      .cta-buttons .btn {
        width: 100%;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        transition: none !important;
        scroll-behavior: auto !important;
      }
    }