/* =========================================
   铭赞网络·短视频矩阵营销
   main.css - 主体样式
   ========================================= */

/* ---------- 变量 ---------- */
:root {
  --c-navy: #0A1A3A;
  --c-navy-deep: #050E25;
  --c-navy-2: #16295A;
  --c-gold: #C9A35A;
  --c-gold-2: #B5894A;
  --c-gold-soft: #E8D2A0;
  --c-red: #C8102E;
  --c-bg: #FFFFFF;
  --c-bg-alt: #F5F6F8;
  --c-bg-dark: #0A1A3A;
  --c-text: #1A1A1A;
  --c-text-2: #4A4A4A;
  --c-text-3: #6E7480;
  --c-text-inv: #FFFFFF;
  --c-line: #E5E7EB;
  --c-line-2: #D9DDE3;

  --ff-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --ff-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --shadow-sm: 0 2px 8px rgba(10, 26, 58, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 26, 58, 0.08);
  --shadow-lg: 0 20px 50px rgba(10, 26, 58, 0.14);
  --shadow-gold: 0 10px 30px rgba(201, 163, 90, 0.28);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--c-gold); }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5 { font-family: var(--ff-serif); font-weight: 600; line-height: 1.3; margin: 0; color: var(--c-text); }
p { margin: 0; }

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

/* ---------- 顶部条 ---------- */
.topbar {
  background: var(--c-navy-deep);
  color: rgba(255,255,255,.78);
  font-size: 13px;
  border-bottom: 1px solid rgba(201, 163, 90, .18);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
  gap: 16px;
}
.topbar-left { letter-spacing: .02em; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.topbar-right a { color: var(--c-gold-soft); }
.topbar-right .sep { color: rgba(255,255,255,.3); }

/* ---------- 头部 + 导航 ---------- */
.site-header {
  position: relative;
  background: var(--c-bg);
}
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.nav-wrap.is-scrolled {
  border-color: var(--c-line);
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.96);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-navy);
  font-family: var(--ff-serif);
  font-weight: 700;
  letter-spacing: 0.01em;
}
.logo-mark {
  font-size: 24px;
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  color: var(--c-navy);
}
.logo-mark .reg {
  font-size: 11px;
  vertical-align: super;
  font-family: var(--ff-sans);
  font-weight: 500;
  color: var(--c-gold);
  margin-left: 2px;
  letter-spacing: 0;
}
.logo-divider {
  width: 1px;
  height: 22px;
  background: linear-gradient(to bottom, transparent, var(--c-gold), transparent);
}
.logo-tag {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-text-2);
  letter-spacing: 0.04em;
  font-family: var(--ff-sans);
}
.logo-foot .logo-mark { font-size: 22px; }
.logo-foot .logo-tag { font-size: 14px; }

.nav { flex: 1; display: flex; justify-content: flex-end; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--c-text-2);
  font-weight: 500;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color .2s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--c-gold);
  transition: width .25s var(--ease), left .25s var(--ease);
}
.nav-list a:hover { color: var(--c-navy); }
.nav-list a:hover::after { width: calc(100% - 28px); left: 14px; }
.nav-cta {
  background: var(--c-navy);
  color: var(--c-text-inv) !important;
  padding: 9px 18px !important;
  border-radius: var(--radius);
  margin-left: 8px;
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.nav-cta:hover { background: var(--c-gold); color: var(--c-navy) !important; }
.nav-cta::after { display: none; }

/* 移动端汉堡菜单 */
.nav-toggle { display: none; }
.nav-burger { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #061231 0%, #0A1A3A 45%, #16295A 100%);
  color: var(--c-text-inv);
  padding: 80px 0 110px;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero-mesh {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(50% 50% at 18% 28%, rgba(201, 163, 90, 0.18), transparent 60%),
    radial-gradient(40% 40% at 82% 22%, rgba(120, 152, 255, 0.18), transparent 60%),
    radial-gradient(45% 45% at 75% 80%, rgba(201, 163, 90, 0.12), transparent 60%);
  filter: blur(0.5px);
  animation: heroFloat 16s ease-in-out infinite;
}
.hero-grain {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: overlay;
  opacity: .35;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
}
.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-gold-soft);
  background: rgba(201, 163, 90, .12);
  border: 1px solid rgba(201, 163, 90, .35);
  border-radius: 999px;
  margin-bottom: 22px;
  font-weight: 500;
}
.hero-title { margin: 0 0 18px; }
.hero-title-main {
  display: block;
  font-size: 3.6em;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.01em;
  background: linear-gradient(120deg, #FFFFFF 30%, var(--c-gold-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-title-sub.title-line-sub {
  display: block;
  font-size: 0.45em;
  font-weight: 500;
  color: rgba(255,255,255,.62);
  margin-top: 14px;
  letter-spacing: 0.04em;
  -webkit-text-fill-color: rgba(255,255,255,.62);
}
.hero-desc {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255,255,255,.78);
  margin: 0 0 30px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .25s var(--ease), background .2s var(--ease), color .2s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-gold) 0%, var(--c-gold-2) 100%);
  color: #1A1A1A;
  box-shadow: var(--shadow-gold);
}
.btn-primary:hover { transform: translateY(-2px); color: #1A1A1A; box-shadow: 0 14px 36px rgba(201, 163, 90, .4); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.32);
}
.btn-ghost:hover { background: rgba(255,255,255,.08); color: var(--c-gold-soft); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.hero-stats li { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--ff-serif);
  font-size: 38px;
  font-weight: 700;
  color: var(--c-gold-soft);
  line-height: 1;
  letter-spacing: 0.01em;
}
.stat-label {
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.62);
  letter-spacing: 0.04em;
}

/* Hero 右侧可视化 */
.hero-visual {
  position: relative;
  height: 460px;
}
.hero-orb {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(201, 163, 90, .35), rgba(201, 163, 90, 0) 60%),
              radial-gradient(circle at 70% 70%, rgba(120, 152, 255, .25), rgba(120, 152, 255, 0) 60%);
  filter: blur(20px);
  z-index: 0;
}
.hero-card {
  position: absolute;
  width: 240px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.hc-title { font-size: 14px; color: var(--c-gold-soft); font-weight: 500; margin-bottom: 12px; letter-spacing: 0.04em; }
.hc-bar { height: 6px; background: rgba(255,255,255,.1); border-radius: 4px; overflow: hidden; margin-bottom: 10px; }
.hc-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--c-gold), var(--c-gold-soft)); border-radius: 4px; }
.hc-meta { font-size: 13px; color: rgba(255,255,255,.7); }

.hero-card-1 { top: 30px; left: 20px; animation: floaty 6s ease-in-out infinite; }
.hero-card-2 { top: 50%; right: 0; transform: translateY(-50%); animation: floaty 7s ease-in-out infinite reverse; }
.hero-card-3 { bottom: 30px; left: 50%; transform: translateX(-50%); animation: floaty 8s ease-in-out infinite; }

.hero-scroll {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid rgba(255,255,255,.4);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.hero-scroll span {
  display: block;
  width: 3px;
  height: 8px;
  background: var(--c-gold-soft);
  border-radius: 2px;
  animation: scrollDot 1.6s ease-in-out infinite;
}

/* ---------- 通用 section ---------- */
.section {
  padding: 110px 0;
  position: relative;
}
.section:nth-of-type(even) { background: var(--c-bg-alt); }
.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--c-gold);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-title {
  font-size: 38px;
  line-height: 1.25;
  color: var(--c-navy);
  margin: 0 0 16px;
  font-weight: 700;
}
.section-desc {
  font-size: 16px;
  color: var(--c-text-3);
  line-height: 1.85;
  margin: 0;
}

/* ---------- 核心服务 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  position: relative;
  padding: 42px 36px 36px;
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--c-line);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  overflow: hidden;
  isolation: isolate;
}
.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(135deg, var(--c-gold) 0%, transparent 50%, var(--c-gold) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .3s var(--ease);
  z-index: -1;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 64px;
  height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-navy);
  background: linear-gradient(135deg, #FAEFD7 0%, #F0DFB6 100%);
  border-radius: var(--radius);
  margin-bottom: 22px;
  transition: transform .3s var(--ease), color .3s var(--ease);
}
.service-card:hover .service-icon { color: var(--c-gold); transform: rotate(-6deg) scale(1.05); }
.service-icon svg { width: 38px; height: 38px; }
.service-title {
  font-size: 24px;
  color: var(--c-navy);
  margin-bottom: 12px;
  font-weight: 700;
}
.service-desc {
  font-size: 15px;
  color: var(--c-text-3);
  line-height: 1.8;
  margin-bottom: 18px;
}
.service-list {
  border-top: 1px dashed var(--c-line-2);
  padding-top: 18px;
  margin-bottom: 22px;
}
.service-list li {
  position: relative;
  padding: 6px 0 6px 22px;
  font-size: 14.5px;
  color: var(--c-text-2);
}
.service-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
}
.service-link {
  display: inline-flex;
  align-items: center;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--c-navy);
  letter-spacing: 0.04em;
  transition: color .2s var(--ease), gap .2s var(--ease);
}
.service-link:hover { color: var(--c-gold); gap: 4px; }

/* ---------- 拓展业务 9 宫格 ---------- */
.expanded-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ex-card {
  display: block;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  position: relative;
  overflow: hidden;
}
.ex-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--c-gold); }
.ex-num {
  font-family: var(--ff-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
  transition: transform .3s var(--ease);
}
.ex-card:hover .ex-num { transform: translateX(4px); }
.ex-card h4 {
  font-size: 19px;
  color: var(--c-navy);
  margin-bottom: 8px;
  font-weight: 600;
}
.ex-card p {
  font-size: 14.5px;
  color: var(--c-text-3);
  line-height: 1.7;
}

/* ---------- 平台覆盖 ---------- */
.section-platforms { background: linear-gradient(180deg, #fff 0%, #F5F6F8 100%); }
.platforms-sub {
  font-size: 16px;
  color: var(--c-navy);
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 3px solid var(--c-gold);
  font-weight: 600;
}
.platforms-sub + .platforms-grid { margin-bottom: 38px; }
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.pf {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.pf:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.pf-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.pf-icon svg { width: 18px; height: 18px; }

/* ---------- 15年+ 优势 ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 70px;
}
.adv-card {
  padding: 32px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--c-line);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.adv-num {
  font-family: var(--ff-serif);
  font-size: 44px;
  font-weight: 700;
  color: var(--c-navy);
  line-height: 1;
  margin-bottom: 6px;
}
.adv-num .stat-num { color: var(--c-navy); }
.adv-card h4 {
  font-size: 18px;
  color: var(--c-gold);
  margin-bottom: 10px;
  font-weight: 600;
}
.adv-card p { font-size: 14px; color: var(--c-text-3); line-height: 1.7; }

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 36px;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--c-gold) 10%, var(--c-gold) 90%, transparent);
}
.timeline li {
  position: relative;
  padding: 70px 22px 22px;
  text-align: center;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 28px;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--c-gold);
  box-shadow: 0 0 0 5px rgba(201, 163, 90, .18);
}
.tl-year {
  font-family: var(--ff-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-navy);
  margin-bottom: 6px;
}
.tl-body h5 {
  font-size: 16px;
  color: var(--c-gold);
  margin-bottom: 6px;
  font-weight: 600;
}
.tl-body p {
  font-size: 13.5px;
  color: var(--c-text-3);
  line-height: 1.7;
}

/* ---------- 服务流程 ---------- */
.process-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  counter-reset: p;
}
.proc {
  position: relative;
  padding: 26px 18px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-line);
  text-align: center;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.proc:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.proc-num {
  display: inline-block;
  font-family: var(--ff-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1;
  margin-bottom: 10px;
}
.proc h4 { font-size: 16px; color: var(--c-navy); margin-bottom: 6px; font-weight: 600; }
.proc p { font-size: 13px; color: var(--c-text-3); line-height: 1.7; }

/* ---------- 行业方案 ---------- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.ind-card {
  padding: 32px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-line);
  position: relative;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.ind-card::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 163, 90, .12), transparent 70%);
  transition: transform .3s var(--ease);
}
.ind-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.ind-card:hover::after { transform: scale(1.4); }
.ind-card h4 { font-size: 20px; color: var(--c-navy); margin-bottom: 10px; font-weight: 600; }
.ind-card p { font-size: 14.5px; color: var(--c-text-3); line-height: 1.8; }

/* ---------- FAQ ---------- */
.section-faq { background: var(--c-bg-alt); }
.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.faq-item[open] { border-color: var(--c-gold); box-shadow: var(--shadow-sm); }
.faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 24px;
  cursor: pointer;
  list-style: none;
  font-family: var(--ff-serif);
  font-size: 17px;
  color: var(--c-navy);
  font-weight: 600;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-q {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-gold) 0%, var(--c-gold-2) 100%);
  color: #fff;
  font-size: 13px;
  font-family: var(--ff-sans);
  font-weight: 600;
  flex-shrink: 0;
}
.faq-toggle {
  margin-left: auto;
  width: 26px;
  height: 26px;
  position: relative;
  flex-shrink: 0;
  transition: transform .25s var(--ease);
}
.faq-toggle::before, .faq-toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-gold);
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease);
}
.faq-toggle::before { width: 12px; height: 2px; }
.faq-toggle::after { width: 2px; height: 12px; }
.faq-item[open] .faq-toggle::after { transform: translate(-50%, -50%) scaleY(0); }
.faq-a {
  padding: 0 24px 22px 70px;
  color: var(--c-text-2);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 联系方式 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 36px;
  align-items: stretch;
}
.contact-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.ct-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 20px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
a.ct-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-gold); }
.ct-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-2) 100%);
  color: var(--c-gold-soft);
  flex-shrink: 0;
}
.ct-icon svg { width: 24px; height: 24px; }
.ct-label { font-size: 13px; color: var(--c-text-3); margin-bottom: 4px; letter-spacing: 0.04em; }
.ct-value { font-size: 16px; color: var(--c-navy); font-weight: 600; line-height: 1.4; }

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-2) 100%);
  border-radius: var(--radius-xl);
  color: #fff;
  text-align: center;
}
.qr-img {
  width: 200px;
  height: 200px;
  background: #fff;
  border-radius: var(--radius);
  padding: 10px;
  margin-bottom: 18px;
  box-shadow: 0 12px 28px rgba(0,0,0,.25);
}
.qr-img img { width: 100%; height: 100%; object-fit: contain; border-radius: 4px; }
.qr-tip {
  font-size: 17px;
  color: var(--c-gold-soft);
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}
.qr-desc {
  font-size: 13.5px;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--c-navy-deep);
  color: rgba(255,255,255,.72);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 2.4fr;
  gap: 50px;
  padding-bottom: 50px;
}
.footer-brand .logo { color: #fff; }
.footer-brand .logo-mark { color: #fff; }
.footer-brand .logo-tag { color: rgba(255,255,255,.6); }
.footer-intro {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255,255,255,.6);
  margin: 18px 0 18px;
}
.footer-cert {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12.5px;
  background: rgba(201, 163, 90, .12);
  color: var(--c-gold-soft);
  border: 1px solid rgba(201, 163, 90, .25);
  border-radius: 4px;
}
.footer-col h5 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,.62);
  transition: color .2s var(--ease);
}
.footer-col ul li a:hover { color: var(--c-gold-soft); }

.footer-col-wide .footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px 14px;
}
.footer-col-wide .footer-links li { margin-bottom: 4px; }
.footer-col-wide .footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,.58);
  display: inline-block;
  padding: 3px 0;
}
.footer-col-wide .footer-links a::before { content: "· "; color: var(--c-gold); }
.footer-col-wide .footer-links a:hover { color: var(--c-gold-soft); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  letter-spacing: 0.02em;
}
.footer-bottom a { color: var(--c-gold-soft); }
.footer-bottom a:hover { color: var(--c-gold); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-navy);
  color: var(--c-gold-soft);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), background .2s var(--ease);
  z-index: 80;
}
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { background: var(--c-gold); color: var(--c-navy); }
.back-top svg { width: 22px; height: 22px; }