/* roulang page: index */
:root {
  --bg-main: #0C0A08;
  --bg-panel: #14110D;
  --bg-panel-light: #1A1611;
  --bg-deep: #080706;
  --gold: #C9A063;
  --gold-soft: rgba(201, 160, 99, .45);
  --gold-border: rgba(201, 160, 99, .35);
  --orange: #DE6B48;
  --green: #3BA888;
  --text-main: #EAE4D9;
  --text-sub: #A49B8E;
  --text-dim: #6F675C;
  --radius-card: 10px;
  --radius-btn: 4px;
  --shadow-panel: 0 8px 30px rgba(0, 0, 0, .45);
  --shadow-gold: 0 0 0 1px rgba(201, 160, 99, .4), 0 12px 40px rgba(0, 0, 0, .6);
  --container: 1200px;
  --space-section: 100px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font-main); cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: var(--font-main); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }
section { position: relative; z-index: 1; }

/* ===== Top Info Bar ===== */
.topbar {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--gold-border);
  height: 38px;
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-sub);
}
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar-left span { margin-right: 20px; }
.topbar-left i { color: var(--gold); margin-right: 4px; }
.topbar-right a {
  color: var(--text-main);
  padding: 2px 12px;
  border: 1px solid var(--gold-border);
  border-radius: 3px;
  font-size: 12px;
  transition: all .3s;
}
.topbar-right a:hover { border-color: var(--gold); color: var(--gold); }

/* ===== Main Nav ===== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 10, 8, .95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 160, 99, .15);
  transition: all .4s;
}
.main-nav.scrolled { box-shadow: 0 6px 30px rgba(0,0,0,.6); }
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
  color: var(--text-main);
}
.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--gold), #8a6b3a);
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #0C0A08;
  font-weight: 900;
}
.brand-text { color: var(--gold); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--text-sub);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color .3s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width .35s;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn-nav {
  background: var(--gold);
  color: #0C0A08;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: var(--radius-btn);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%);
  transition: all .3s;
}
.btn-nav:hover { background: var(--orange); color: #fff; box-shadow: 0 0 20px var(--glow-orange); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--gold);
  transition: all .3s;
}
.hamburger:hover span { background: var(--text-main); }

/* ===== Mobile Drawer ===== */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  height: 100vh;
  background: var(--bg-panel);
  border-left: 1px solid var(--gold-border);
  z-index: 200;
  padding: 30px;
  transition: right .45s cubic-bezier(.77,0,.18,1);
  box-shadow: -20px 0 60px rgba(0,0,0,.6);
}
.mobile-drawer.open { right: 0; }
.drawer-close {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 26px;
  color: var(--gold);
  background: none;
  line-height: 1;
  padding: 4px;
}
.drawer-nav { list-style: none; margin-top: 60px; }
.drawer-nav li { margin-bottom: 8px; }
.drawer-nav a {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  color: var(--text-main);
  border-left: 2px solid transparent;
  transition: all .3s;
}
.drawer-nav a:hover { border-left-color: var(--gold); color: var(--gold); background: rgba(201,160,99,.06); }
.drawer-cta { margin-top: 30px; text-align: center; }
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: all .4s;
}
.drawer-overlay.show { opacity: 1; visibility: visible; }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 90px 0 80px;
  background:
    linear-gradient(rgba(12,10,8,.85), rgba(12,10,8,.92)),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid rgba(201,160,99,.2);
}
.hero::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(105deg, transparent 40%, rgba(201,160,99,.08) 100%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  text-align: center;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-block;
  margin: 0 auto 20px;
  padding: 5px 18px;
  border: 1px solid var(--gold-border);
  border-radius: 30px;
  font-size: 13px;
  color: var(--gold);
  background: rgba(201,160,99,.08);
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 16px;
}
.hero h1 .gold { color: var(--gold); position: relative; }
.hero h1 .gold::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(201,160,99,.18);
  z-index: -1;
}
.hero-sub {
  font-size: 18px;
  color: var(--text-sub);
  max-width: 600px;
  margin: 0 auto 30px;
  line-height: 1.7;
}
/* Search Box */
.hero-search {
  max-width: 620px;
  margin: 0 auto 20px;
  display: flex;
  background: rgba(20,17,13,.9);
  border: 1px solid var(--gold-border);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}
.hero-search:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,160,99,.15), 0 8px 30px rgba(0,0,0,.5);
}
.hero-search input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 14px 18px;
  font-size: 15px;
  color: var(--text-main);
  outline: none;
}
.hero-search input::placeholder { color: var(--text-dim); }
.hero-search button {
  background: var(--gold);
  border: none;
  color: #0C0A08;
  font-weight: 700;
  padding: 14px 26px;
  font-size: 14px;
  transition: background .3s;
}
.hero-search button:hover { background: var(--orange); color: #fff; }
/* Hot Tags */
.hero-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}
.hero-tags span { font-size: 13px; color: var(--text-dim); }
.hero-tags a {
  font-size: 13px;
  padding: 4px 14px;
  border: 1px solid rgba(201,160,99,.3);
  border-radius: 30px;
  color: var(--text-sub);
  transition: all .3s;
}
.hero-tags a:hover { border-color: var(--gold); color: var(--gold); }
/* Metrics Bar */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.metric-card {
  background: linear-gradient(160deg, rgba(26,22,17,.95), rgba(20,17,13,.9));
  border: 1px solid rgba(201,160,99,.2);
  border-radius: var(--radius-card);
  padding: 22px 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.metric-card::before {
  content: "";
  position: absolute;
  top: 6px; left: 6px;
  width: 14px; height: 14px;
  border-top: 1px solid var(--gold-border);
  border-left: 1px solid var(--gold-border);
  opacity: .5;
}
.metric-card::after {
  content: "";
  position: absolute;
  bottom: 6px; right: 6px;
  width: 14px; height: 14px;
  border-bottom: 1px solid var(--gold-border);
  border-right: 1px solid var(--gold-border);
  opacity: .5;
}
.metric-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.metric-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}
.metric-num i { font-style: normal; font-size: 16px; color: var(--text-sub); font-weight: 600; }
.metric-label { font-size: 13px; color: var(--text-sub); margin-top: 4px; }
.metric-trend {
  display: inline-block;
  font-size: 12px;
  color: var(--green);
  margin-left: 6px;
}
/* Energy Bar */
.hero-energy {
  max-width: 900px;
  margin: 24px auto 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.energy-track {
  flex: 1;
  height: 6px;
  background: rgba(201,160,99,.12);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}
.energy-fill {
  height: 100%;
  width: 86%;
  background: linear-gradient(90deg, var(--gold), var(--orange));
  border-radius: 10px;
  position: relative;
}
.energy-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent);
  animation: shimmer 2s infinite;
}
@keyframes shimmer { 0% { left: -100%; } 100% { left: 100%; } }
.energy-text { font-size: 13px; color: var(--text-dim); white-space: nowrap; font-variant-numeric: tabular-nums; }

/* ===== Section Common ===== */
.section { padding: var(--space-section) 0; position: relative; }
.section-header { margin-bottom: 40px; }
.section-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 2px;
  border: 1px solid rgba(222,107,72,.3);
  padding: 3px 12px;
  border-radius: 3px;
  margin-bottom: 12px;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.section-kicker {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 10px;
  line-height: 1.3;
}
.section-kicker .gold { color: var(--gold); }
.section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 560px;
  line-height: 1.7;
}

/* ===== Feature Trio ===== */
.feature-trio {
  background: var(--bg-panel);
  border-bottom: 1px solid rgba(201,160,99,.1);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-main);
  border: 1px solid rgba(201,160,99,.15);
  border-radius: var(--radius-card);
  padding: 30px 24px;
  text-align: center;
  position: relative;
  transition: all .4s;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity .4s;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: rgba(201,160,99,.1);
  border: 1px solid var(--gold-border);
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
  transition: color .3s;
}
.feature-card:hover h3 { color: var(--gold); }
.feature-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* ===== Service Matrix ===== */
.service-section { background: var(--bg-main); }
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.filter-btn {
  padding: 7px 20px;
  border: 1px solid var(--gold-border);
  border-radius: 30px;
  font-size: 13px;
  color: var(--text-sub);
  transition: all .3s;
  background: transparent;
}
.filter-btn:hover { border-color: var(--gold); color: var(--gold); }
.filter-btn.active { background: var(--gold); color: #0C0A08; border-color: var(--gold); font-weight: 700; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-panel);
  border: 1px solid rgba(201,160,99,.18);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all .4s;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.service-card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--bg-panel-light);
}
.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s;
}
.service-card:hover .service-card-img img { transform: scale(1.03); }
.service-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12,10,8,.4), transparent 60%);
}
.service-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  background: var(--gold);
  color: #0C0A08;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 85% 100%, 0 100%);
}
.service-card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.service-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
  transition: color .3s;
}
.service-card:hover .service-card-body h3 { color: var(--gold); }
.service-card-body > p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin-bottom: 18px; flex: 1; }
.service-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.service-tags span {
  font-size: 12px;
  padding: 3px 10px;
  border: 1px solid rgba(201,160,99,.3);
  border-radius: 20px;
  color: var(--text-sub);
}
.service-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .3s;
}
.service-link:hover { gap: 12px; }

/* ===== Compare Section ===== */
.compare-section {
  background: var(--bg-panel);
  border-bottom: 1px solid rgba(201,160,99,.1);
}
.compare-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
  position: relative;
}
.compare-vs {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
}
.vs-badge {
  width: 68px;
  height: 68px;
  background: var(--bg-main);
  border: 2px solid var(--gold);
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 12px rgba(201,160,99,.6);
  box-shadow: 0 0 30px rgba(201,160,99,.25);
}
.compare-panel {
  background: var(--bg-main);
  border: 1px solid rgba(201,160,99,.15);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: border-color .3s;
}
.compare-panel.strong {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px rgba(201,160,99,.25), 0 8px 30px rgba(0,0,0,.5);
}
.compare-panel.weak {
  border-color: rgba(111,103,92,.3);
  opacity: .85;
}
.compare-panel h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 6px;
}
.compare-panel.weak h3 { color: var(--text-dim); }
.compare-panel.strong h3 { color: var(--gold); }
.compare-sub { font-size: 13px; color: var(--text-dim); margin-bottom: 26px; }
.compare-row {
  margin-bottom: 20px;
}
.compare-row-label {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-sub);
}
.compare-row-label span:last-child { font-variant-numeric: tabular-nums; font-weight: 700; }
.compare-bar {
  height: 6px;
  background: rgba(255,255,255,.06);
  border-radius: 10px;
  overflow: hidden;
}
.compare-bar-fill {
  height: 100%;
  border-radius: 10px;
}
.compare-panel.weak .compare-bar-fill {
  background: linear-gradient(90deg, #6F675C, #DE6B48);
  width: 40%;
}
.compare-panel.strong .compare-bar-fill {
  background: linear-gradient(90deg, var(--gold), var(--orange));
}
.compare-conclusion {
  grid-column: 1 / -1;
  text-align: center;
  margin-top: 20px;
  padding: 16px 30px;
  background: linear-gradient(90deg, rgba(201,160,99,.12), rgba(201,160,99,.2), rgba(201,160,99,.12));
  border: 1px solid var(--gold-border);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}
.compare-conclusion span { color: var(--gold); }

/* ===== Social Proof ===== */
.social-proof { background: var(--bg-main); }
.social-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-panel);
  border: 1px solid rgba(201,160,99,.14);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: all .4s;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.testimonial-stars {
  color: var(--gold);
  font-size: 16px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.testimonial-text {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #0C0A08;
}
.testimonial-name { font-size: 14px; font-weight: 600; }
.testimonial-role { font-size: 12px; color: var(--text-dim); }

/* ===== News Section ===== */
.news-section { background: var(--bg-panel); }
.news-list {
  background: var(--bg-main);
  border: 1px solid rgba(201,160,99,.15);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 22px 26px;
  border-bottom: 1px solid rgba(201,160,99,.08);
  transition: background .3s;
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: rgba(201,160,99,.04); }
.news-date-box {
  min-width: 62px;
  height: 68px;
  border: 1px solid var(--gold-border);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px;
  transition: all .3s;
}
.news-item:hover .news-date-box { background: var(--gold); border-color: var(--gold); }
.news-date-day {
  font-size: 24px;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: color .3s;
}
.news-item:hover .news-date-day { color: #0C0A08; }
.news-date-month {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
  transition: color .3s;
}
.news-item:hover .news-date-month { color: #0C0A08; }
.news-info { flex: 1; min-width: 0; }
.news-info h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color .3s;
}
.news-item:hover .news-info h3 { color: var(--gold); }
.news-info p {
  font-size: 14px;
  color: var(--text-sub);
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta { display: flex; align-items: center; gap: 18px; flex-shrink: 0; }
.news-cat {
  font-size: 12px;
  padding: 4px 14px;
  border: 1px solid var(--gold-border);
  border-radius: 30px;
  color: var(--gold);
  white-space: nowrap;
}
.news-arrow {
  width: 34px;
  height: 34px;
  border: 1px solid var(--gold-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-size: 14px;
  transition: all .3s;
}
.news-item:hover .news-arrow {
  background: var(--gold);
  color: #0C0A08;
  transform: translateX(4px);
}
.news-footer { margin-top: 30px; text-align: center; }
.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 15px;
  border: 1px dashed var(--text-dim);
  border-radius: var(--radius-card);
}
.btn-more {
  display: inline-block;
  padding: 12px 34px;
  border: 1px solid var(--gold);
  color: var(--gold);
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  transition: all .3s;
}
.btn-more:hover {
  background: var(--gold);
  color: #0C0A08;
  box-shadow: 0 0 24px var(--glow-gold);
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg-main); }
.faq-layout {
  display: grid;
  grid-template-columns: 36% 1fr;
  gap: 40px;
}
.faq-intro { padding: 20px 0; }
.faq-intro h2 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 14px;
}
.faq-intro p { color: var(--text-sub); font-size: 15px; margin-bottom: 20px; }
.faq-contact {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border: 1px solid var(--gold-border);
  border-radius: 6px;
  color: var(--gold);
  font-size: 14px;
  transition: all .3s;
}
.faq-contact:hover { border-color: var(--gold); box-shadow: 0 0 16px rgba(201,160,99,.2); }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(201,160,99,.14);
  border-radius: 8px;
  overflow: hidden;
  transition: all .4s;
}
.faq-item.active {
  border-color: var(--gold);
  border-left-width: 3px;
  border-left-color: var(--gold);
  box-shadow: 0 0 20px rgba(201,160,99,.12);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  user-select: none;
  transition: background .3s;
}
.faq-question:hover { background: rgba(201,160,99,.04); }
.faq-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  min-width: 24px;
}
.faq-item.active .faq-num { color: var(--gold); }
.faq-q {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}
.faq-icon {
  font-size: 14px;
  color: var(--gold);
  transition: transform .4s;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .5s ease;
}
.faq-item.active .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 22px 20px 62px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
}

/* ===== Contact Form ===== */
.cta-section {
  background:
    linear-gradient(rgba(12,10,8,.94), rgba(12,10,8,.97)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  border-bottom: 1px solid rgba(201,160,99,.2);
}
.cta-panel {
  display: grid;
  grid-template-columns: 40% 60%;
  gap: 40px;
  background: var(--bg-panel);
  border: 1px solid var(--gold-border);
  border-radius: 12px;
  padding: 44px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.cta-panel::before, .cta-panel::after {
  content: "";
  position: absolute;
  width: 60px; height: 60px;
  border: 2px solid var(--gold-border);
  opacity: .5;
}
.cta-panel::before { top: 10px; left: 10px; border-right: none; border-bottom: none; }
.cta-panel::after { bottom: 10px; right: 10px; border-left: none; border-top: none; }
.cta-left h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.cta-left p { color: var(--text-sub); font-size: 15px; margin-bottom: 24px; line-height: 1.8; }
.cta-info-list { list-style: none; margin-bottom: 24px; }
.cta-info-list li {
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.cta-info-list li i {
  width: 32px;
  height: 32px;
  background: rgba(201,160,99,.1);
  border: 1px solid var(--gold-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--gold);
  font-style: normal;
}
.cta-info-list li span { color: var(--text-dim); font-size: 13px; }
.cta-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-size: 13px;
  color: var(--text-sub);
  font-weight: 500;
}
.form-group label em { color: var(--orange); font-style: normal; margin-left: 2px; }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-main);
  border: 1px solid rgba(201,160,99,.25);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  transition: border-color .3s, box-shadow .3s;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,160,99,.12);
}
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23C9A063' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.form-group select option { background: var(--bg-panel); color: var(--text-main); }
.form-submit {
  grid-column: 1 / -1;
  text-align: center;
  margin-top: 8px;
}
.btn-submit {
  background: var(--gold);
  color: #0C0A08;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 48px;
  border-radius: var(--radius-btn);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 50%, calc(100% - 12px) 100%, 0 100%);
  transition: all .35s;
  display: inline-block;
}
.btn-submit:hover {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 0 28px var(--glow-orange);
  transform: translateY(-2px);
}
.form-privacy {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--gold), transparent) 1;
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  max-width: 260px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--gold);
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 14px;
  color: var(--text-sub);
  transition: color .3s, padding-left .3s;
}
.footer-col ul a:hover {
  color: var(--gold);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 12px;
  align-items: flex-start;
}
.footer-contact li i {
  color: var(--gold);
  font-style: normal;
  margin-top: 2px;
}
.footer-bottom {
  border-top: 1px solid rgba(201,160,99,.15);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom a { color: var(--text-dim); transition: color .3s; }
.footer-bottom a:hover { color: var(--gold); }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  :root { --space-section: 76px; }
  .nav-links, .nav-cta .btn-nav { display: none; }
  .hamburger { display: flex; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-wrap { gap: 30px; }
  .compare-vs { display: none; }
  .compare-panel { padding: 24px; }
  .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .cta-panel { grid-template-columns: 1fr; padding: 32px; }
  .social-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 767px) {
  :root { --space-section: 64px; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: 15px; }
  .hero-search { flex-direction: column; border-radius: 8px; }
  .hero-search button { width: 100%; }
  .hero-metrics { grid-template-columns: 1fr 1fr; gap: 12px; }
  .metric-card { padding: 16px; }
  .metric-num { font-size: 22px; }
  .topbar-left span { display: none; }
  .topbar-inner { justify-content: flex-end; }
  .feature-grid, .service-grid, .social-grid { grid-template-columns: 1fr; }
  .compare-wrap { grid-template-columns: 1fr; }
  .compare-panel.weak { margin-bottom: 0; }
  .compare-conclusion { font-size: 14px; }
  .news-item { flex-wrap: wrap; gap: 12px; padding: 18px; }
  .news-date-box { min-width: 50px; height: 56px; }
  .news-date-day { font-size: 20px; }
  .news-meta { width: 100%; justify-content: space-between; }
  .cta-form { grid-template-columns: 1fr; }
  .form-group.full, .form-submit, .form-privacy { grid-column: 1; }
  .cta-panel { padding: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .faq-answer-inner { padding-left: 20px; }
}

/* roulang page: article */
:root {
  --bg-primary: #0C0A08;
  --bg-panel: #14110D;
  --bg-panel-2: #1A1611;
  --bg-deep: #080706;
  --accent-gold: #C9A063;
  --accent-orange: #DE6B48;
  --accent-green: #3BA888;
  --text-primary: #EAE4D9;
  --text-secondary: #A49B8E;
  --text-muted: #6F675C;
  --border-gold: rgba(201, 160, 99, .35);
  --glow-gold: rgba(201, 160, 99, .45);
  --glow-orange: rgba(222, 107, 72, .45);
  --radius: 10px;
  --radius-sm: 4px;
  --shadow: 0 8px 30px rgba(0, 0, 0, .45);
  --shadow-hover: 0 0 0 1px rgba(201, 160, 99, .4), 0 12px 40px rgba(0, 0, 0, .6);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container: 1200px;
  --space: 96px;
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  background-image: linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .25s;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ========== 顶部信息条 ========== */
.topbar {
  background: var(--bg-deep);
  border-bottom: 1px solid rgba(201, 160, 99, .1);
  height: 40px;
  display: flex;
  align-items: center;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  font-size: .8125rem;
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.topbar-right a {
  color: var(--accent-gold);
}

.topbar-right a:hover {
  color: #fff;
}

.topbar-time {
  color: var(--text-muted);
  border-left: 1px solid rgba(255, 255, 255, .1);
  padding-left: 12px;
}

/* ========== 主导航 ========== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 10, 8, .94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 160, 99, .15);
}

.main-nav.scrolled {
  box-shadow: 0 8px 30px rgba(0, 0, 0, .5);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  color: #0C0A08;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.125rem;
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  flex-shrink: 0;
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: .5px;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  padding: 8px 2px;
  font-size: .9375rem;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: color .25s, border-color .25s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-nav {
  padding: 8px 20px;
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  font-size: .875rem;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: all .25s;
  cursor: pointer;
  white-space: nowrap;
}

.btn-nav:hover {
  background: var(--accent-gold);
  color: #0C0A08;
  box-shadow: 0 0 20px var(--glow-gold);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  width: 32px;
  height: 32px;
  padding: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: background .3s;
}

.hamburger:hover span {
  background: var(--accent-gold);
}

/* ========== 移动菜单 ========== */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(12, 10, 8, .98);
  padding: 24px;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 520px;
  width: 100%;
  margin: 0 auto;
}

.mobile-close {
  align-self: flex-end;
  background: none;
  border: 1px solid var(--border-gold);
  color: var(--text-primary);
  font-size: 1.75rem;
  line-height: 1;
  width: 42px;
  height: 42px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all .25s;
}

.mobile-close:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  box-shadow: 0 0 12px var(--glow-gold);
}

.mobile-menu-inner .brand {
  margin-top: 8px;
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid rgba(201, 160, 99, .15);
  padding-top: 12px;
}

.mobile-menu ul a {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .04);
  display: block;
}

.mobile-menu ul a:hover {
  color: var(--accent-gold);
}

.mobile-menu-inner .btn {
  margin-top: 8px;
  text-align: center;
}

/* ========== 文章 Hero ========== */
.article-hero {
  padding: 52px 0 44px;
  background: linear-gradient(180deg, rgba(201, 160, 99, .1), transparent 70%),
              url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  position: relative;
  border-bottom: 1px solid var(--border-gold);
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(12, 10, 8, .84);
}

.article-hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 220px;
  height: 100%;
  background: linear-gradient(135deg, transparent 40%, rgba(201, 160, 99, .08) 100%);
  pointer-events: none;
}

.article-hero .container {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.breadcrumb {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
}

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

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

.breadcrumb .sep {
  margin: 0 6px;
  color: var(--text-muted);
}

.article-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  font-size: .8125rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.badge {
  padding: 4px 14px;
  background: rgba(201, 160, 99, .12);
  border: 1px solid var(--border-gold);
  color: var(--accent-gold);
  font-size: .75rem;
  border-radius: 2px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  display: inline-block;
  white-space: nowrap;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.article-hero h1 {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  line-height: 1.35;
  color: var(--text-primary);
  margin: 8px 0 0;
  font-weight: 800;
  letter-spacing: -.5px;
}

/* ========== 正文区 ========== */
.article-section {
  padding: 56px 0 72px;
}

.article-container {
  max-width: 780px;
}

.article-content {
  font-size: 1rem;
  line-height: 2;
  color: var(--text-primary);
  word-break: break-word;
}

.article-content p {
  margin-bottom: 1.6em;
  color: var(--text-secondary);
}

.article-content strong {
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.375rem;
  color: var(--text-primary);
  margin: 2.2em 0 1em;
  padding-left: 14px;
  border-left: 3px solid var(--accent-gold);
  line-height: 1.4;
}

.article-content h3 {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin: 1.8em 0 .8em;
  line-height: 1.4;
}

.article-content img {
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 28px auto;
  height: auto;
}

.article-content blockquote {
  border-left: 3px solid var(--accent-gold);
  background: rgba(201, 160, 99, .06);
  padding: 18px 24px;
  margin: 24px 0;
  color: var(--text-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content ul,
.article-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.6em;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: .5em;
}

.article-content a {
  color: var(--accent-gold);
  border-bottom: 1px solid rgba(201, 160, 99, .3);
}

.article-content a:hover {
  border-color: var(--accent-gold);
}

.article-content code {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, .08);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .875em;
  color: var(--accent-gold);
}

/* ========== 空态 ========== */
.article-empty {
  background: var(--bg-panel);
  border: 1px dashed var(--border-gold);
  border-radius: var(--radius);
  text-align: center;
  padding: 72px 24px;
  color: var(--text-secondary);
}

.article-empty p {
  margin-bottom: 24px;
  font-size: 1.125rem;
}

/* ========== 相关推荐 ========== */
.related-section {
  padding: 64px 0;
  background: var(--bg-deep);
  border-top: 1px solid rgba(201, 160, 99, .08);
}

.related-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 32px;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
  letter-spacing: -.5px;
}

.related-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-gold), var(--accent-orange));
}

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

.related-card {
  background: var(--bg-panel);
  border: 1px solid rgba(201, 160, 99, .12);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

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

.related-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--bg-panel-2);
  transition: transform .4s;
}

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

.related-card-body {
  padding: 20px;
}

.related-card-body h3 {
  font-size: .9375rem;
  color: var(--text-primary);
  line-height: 1.55;
  margin-bottom: 8px;
  font-weight: 700;
}

.related-card-body p {
  font-size: .8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.related-card-body .related-link {
  display: inline-block;
  margin-top: 12px;
  font-size: .8125rem;
  color: var(--accent-gold);
  transition: transform .25s;
}

.related-card:hover .related-link {
  transform: translateX(4px);
}

/* ========== 返回入口 ========== */
.back-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  padding: 56px 20px 80px;
  flex-wrap: wrap;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 12px 30px;
  font-size: .9375rem;
  border-radius: var(--radius-sm);
  transition: all .25s;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  font-weight: 500;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), #D9B57B);
  color: #0C0A08;
  font-weight: 700;
}

.btn-primary:hover {
  box-shadow: 0 0 24px var(--glow-gold);
  transform: translateY(-1px);
  color: #0C0A08;
}

.btn-outline {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(201, 160, 99, .08);
  box-shadow: 0 0 16px var(--glow-gold);
  color: var(--accent-gold);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-deep);
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
  border: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 64px 0 40px;
}

.footer-brand .brand {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: .875rem;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: .9375rem;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: .5px;
  font-weight: 700;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
  font-size: .875rem;
  color: var(--text-secondary);
}

.footer-col a {
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--accent-gold);
}

.footer-contact i {
  font-style: normal;
  margin-right: 6px;
  color: var(--accent-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(201, 160, 99, .1);
  padding: 20px 0;
  text-align: center;
  font-size: .8125rem;
  color: var(--text-muted);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .article-hero {
    padding: 44px 0 36px;
  }
}

@media (max-width: 767px) {
  :root {
    --space: 64px;
  }

  .topbar-inner > span {
    display: none;
  }

  .topbar-right {
    width: 100%;
    justify-content: flex-end;
  }

  .nav-inner {
    height: 62px;
  }

  .nav-cta .btn-nav {
    display: none;
  }

  .article-hero {
    padding: 36px 0 30px;
  }

  .article-hero h1 {
    font-size: 1.25rem;
    line-height: 1.4;
  }

  .article-meta {
    gap: 10px;
  }

  .article-section {
    padding: 40px 0 56px;
  }

  .article-content {
    font-size: .9375rem;
    line-height: 1.85;
  }

  .article-content h2 {
    font-size: 1.1875rem;
  }

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

  .related-title {
    font-size: 1.25rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 48px 0 32px;
  }

  .back-links {
    flex-direction: column;
    align-items: center;
    padding: 40px 20px 64px;
  }

  .back-links .btn {
    width: 100%;
    max-width: 320px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .related-card-img {
    height: 140px;
  }
}