/* ============================================================
   星澜智能 STARLANE AI — 全站共享样式
   ============================================================ */

/* ---------- 字体 ---------- */
@font-face {
  font-family: 'Noto Sans SC';
  src: url('../fonts/noto-sans-sc-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Noto Sans SC';
  src: url('../fonts/noto-sans-sc-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Noto Sans SC';
  src: url('../fonts/noto-sans-sc-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/space-grotesk-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- 设计变量 ---------- */
:root {
  --ink: #0B1220;
  --ink-2: #131C30;
  --ink-3: #1C2A45;
  --brand: #1B5BF7;
  --brand-2: #22C6E8;
  --brand-soft: #EAF1FF;
  --teal: #0E9F9F;
  --amber: #F5A524;
  --bg: #FFFFFF;
  --bg-soft: #F4F7FC;
  --bg-deep: #0B1220;
  --line: #E4EAF3;
  --line-2: #D3DCEB;
  --text: #182238;
  --text-2: #5A6B85;
  --text-3: #8B98AC;
  --on-dark: #FFFFFF;
  --on-dark-2: #B9C4D8;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(11, 18, 32, .05), 0 4px 14px rgba(11, 18, 32, .05);
  --shadow-md: 0 10px 30px rgba(11, 18, 32, .08);
  --shadow-lg: 0 24px 60px rgba(11, 18, 32, .14);
  --container: 1200px;
  --header-h: 76px;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }

.num, .count, .stat-num, .eyebrow-en { font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif; font-variant-numeric: tabular-nums; letter-spacing: .01em; }

/* ---------- 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }
.section-deep { background: var(--bg-deep); color: var(--on-dark); }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .lead { margin-top: 16px; color: var(--text-2); font-size: 17px; }
.section-deep .section-head .lead { color: var(--on-dark-2); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500; color: var(--brand);
  letter-spacing: .06em; margin-bottom: 18px;
}
.eyebrow::before { content: ''; width: 22px; height: 2px; background: var(--brand); border-radius: 2px; }
.section-deep .eyebrow { color: var(--brand-2); }
.section-deep .eyebrow::before { background: var(--brand-2); }

.h1, .h2, .h3 { font-weight: 700; color: var(--ink); line-height: 1.25; letter-spacing: -.01em; }
.section-deep .h1, .section-deep .h2, .section-deep .h3 { color: var(--on-dark); }
.h1 { font-size: clamp(34px, 4.6vw, 56px); line-height: 1.18; }
.h2 { font-size: clamp(26px, 3vw, 38px); }
.h3 { font-size: 22px; }

.lead { font-size: 17px; color: var(--text-2); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 28px; border-radius: 999px;
  font-size: 15px; font-weight: 500; color: var(--on-dark);
  background: var(--brand); transition: all .25s var(--ease);
  white-space: nowrap;
}
.btn:hover { background: #1448D2; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(27, 91, 247, .28); }
.btn .arr { transition: transform .25s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-2); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); box-shadow: none; }
.btn-light { background: var(--on-dark); color: var(--ink); }
.btn-light:hover { background: #EAF1FF; box-shadow: 0 10px 24px rgba(255, 255, 255, .18); }
.btn-dark { background: var(--ink); color: var(--on-dark); }
.btn-dark:hover { background: var(--ink-3); box-shadow: 0 10px 24px rgba(11, 18, 32, .25); }
.btn-outline-light { background: transparent; color: var(--on-dark); border: 1px solid rgba(255,255,255,.45); }
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,.12); box-shadow: none; }
.btn-lg { height: 54px; padding: 0 34px; font-size: 16px; }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- 徽标 / 标签 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 500;
  background: var(--brand-soft); color: var(--brand);
}
.badge.amber { background: #FEF3E2; color: #B26E0B; }
.badge.teal { background: #E1F5F5; color: #0B7C7C; }
.badge.dark { background: rgba(255,255,255,.12); color: var(--on-dark); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ============================================================
   页头 / 导航
   ============================================================ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(11, 18, 32, .06);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { width: 38px; height: 38px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: .02em; }
.brand-en { font-family: 'Space Grotesk', sans-serif; font-size: 10px; font-weight: 500; letter-spacing: .32em; color: var(--text-3); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  display: inline-flex; align-items: center;
  height: 42px; padding: 0 16px; border-radius: 999px;
  font-size: 15px; font-weight: 500; color: var(--text-2);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav a:hover { color: var(--ink); background: var(--bg-soft); }
.nav a.active { color: var(--brand); background: var(--brand-soft); }
.header-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border-radius: 12px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line-2); background: var(--bg);
}
.nav-toggle span { position: relative; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: background .2s; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform .25s var(--ease);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span::after { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: var(--bg-deep); color: var(--on-dark-2); }
.footer-main { padding: 72px 0 48px; display: grid; grid-template-columns: 2.2fr 1fr 1fr 1.4fr; gap: 48px; }
.footer-brand .brand-name { color: var(--on-dark); }
.footer-brand .brand-en { color: rgba(255,255,255,.45); }
.footer-about { margin-top: 18px; font-size: 14px; line-height: 1.9; color: var(--on-dark-2); max-width: 300px; }
.footer-social { display: flex; gap: 10px; margin-top: 22px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08); color: var(--on-dark);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.footer-social a:hover { background: var(--brand); transform: translateY(-3px); }
.footer-title { font-size: 14px; font-weight: 700; color: var(--on-dark); margin-bottom: 20px; letter-spacing: .04em; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: var(--on-dark-2); transition: color .2s var(--ease); }
.footer-links a:hover { color: var(--brand-2); }
.footer-contact li { display: flex; gap: 10px; font-size: 14px; margin-bottom: 14px; line-height: 1.7; }
.footer-contact svg { flex-shrink: 0; margin-top: 4px; color: var(--brand-2); }
.footer-contact a { color: var(--on-dark-2); }
.footer-contact a:hover { color: var(--brand-2); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 24px 0;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,.42);
}
.footer-bottom .f-links { display: flex; gap: 24px; }
.footer-bottom .f-links a { color: rgba(255,255,255,.42); transition: color .2s; }
.footer-bottom .f-links a:hover { color: var(--on-dark); }

/* ============================================================
   子页面 Hero
   ============================================================ */
.page-hero {
  position: relative; padding: calc(var(--header-h) + 72px) 0 80px;
  color: var(--on-dark); overflow: hidden;
  background-size: cover; background-position: center;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,18,32,.72) 0%, rgba(11,18,32,.55) 60%, rgba(11,18,32,.82) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,.66); margin-bottom: 22px; }
.breadcrumb a { color: rgba(255,255,255,.66); transition: color .2s; }
.breadcrumb a:hover { color: var(--on-dark); }
.breadcrumb svg { opacity: .6; }
.page-hero h1 { color: var(--on-dark); font-size: clamp(30px, 3.6vw, 46px); font-weight: 700; line-height: 1.2; }
.page-hero .sub { margin-top: 16px; max-width: 620px; font-size: 17px; color: var(--on-dark-2); }

/* ============================================================
   首页 Hero
   ============================================================ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: calc(var(--header-h) + 48px) 0 72px; color: var(--on-dark); overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(11,18,32,.88) 0%, rgba(11,18,32,.62) 55%, rgba(11,18,32,.38) 100%),
    linear-gradient(0deg, rgba(11,18,32,.72) 0%, transparent 40%, rgba(11,18,32,.3) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 780px; }
.hero .eyebrow { color: var(--brand-2); }
.hero .eyebrow::before { background: var(--brand-2); }
.hero-title {
  color: var(--on-dark); font-size: clamp(34px, 5vw, 62px); font-weight: 700;
  line-height: 1.16; letter-spacing: -.01em;
}
.hero-title .grad {
  background: linear-gradient(92deg, #5EA2FF 0%, #22C6E8 70%, #7CE0F5 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin-top: 24px; font-size: 18px; line-height: 1.9; color: var(--on-dark-2); max-width: 620px; }
.hero-actions { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats {
  margin-top: 64px; display: grid; grid-template-columns: repeat(3, minmax(0, 220px));
  gap: 32px; border-top: 1px solid rgba(255,255,255,.16); padding-top: 32px;
}
.hero-stat .num { font-size: 34px; font-weight: 700; color: var(--on-dark); line-height: 1.2; }
.hero-stat .num em { font-style: normal; font-size: 20px; color: var(--brand-2); margin-left: 2px; }
.hero-stat .label { margin-top: 4px; font-size: 14px; color: var(--on-dark-2); }
.hero-scroll {
  position: absolute; right: 40px; bottom: 36px; z-index: 2;
  display: inline-flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(255,255,255,.55); font-size: 12px; letter-spacing: .22em;
}
.hero-scroll .mouse { width: 24px; height: 38px; border: 2px solid rgba(255,255,255,.45); border-radius: 14px; position: relative; }
.hero-scroll .mouse::after {
  content: ''; position: absolute; left: 50%; top: 7px; width: 4px; height: 8px; margin-left: -2px;
  background: var(--brand-2); border-radius: 3px;
  animation: scrollDot 1.8s var(--ease) infinite;
}
@keyframes scrollDot { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }

/* ---------- 客户跑马灯 ---------- */
.marquee-wrap { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 26px 0; overflow: hidden; background: var(--bg); }
.marquee-wrap .m-label { text-align: center; font-size: 13px; color: var(--text-3); letter-spacing: .18em; margin-bottom: 18px; }
.marquee { display: flex; width: max-content; animation: marquee 32s linear infinite; }
.marquee:hover { animation-play-state: paused; }
.marquee .m-item {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 0 42px; font-size: 19px; font-weight: 700; color: #9AA8BE; white-space: nowrap;
}
.marquee .m-item svg { width: 22px; height: 22px; opacity: .8; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 特性卡片 ---------- */
.feature-card {
  padding: 32px 28px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #CBD8F0; }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 19px; margin-bottom: 12px; }
.feature-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.85; }

/* ---------- 服务卡片 ---------- */
.svc-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.svc-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.svc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.svc-card:hover .svc-media img { transform: scale(1.06); }
.svc-media .badge { position: absolute; top: 14px; left: 14px; }
.svc-body { padding: 26px 26px 28px; }
.svc-body h3 { font-size: 19px; margin-bottom: 10px; }
.svc-body p { font-size: 14.5px; color: var(--text-2); line-height: 1.85; }
.svc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.svc-meta .tag { font-size: 12.5px; color: var(--text-3); background: var(--bg-soft); padding: 3px 10px; border-radius: 999px; }
.svc-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font-size: 14px; font-weight: 500; color: var(--brand); }
.svc-link .arr { transition: transform .25s var(--ease); }
.svc-link:hover .arr { transform: translateX(4px); }

/* ---------- 数据条 ---------- */
.stats-band { padding: 72px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.stat-item .num { font-size: clamp(34px, 4vw, 52px); font-weight: 700; color: var(--on-dark); line-height: 1.1; }
.stat-item .num em { font-style: normal; font-size: 24px; color: var(--brand-2); margin-left: 2px; }
.stat-item .label { margin-top: 10px; font-size: 14.5px; color: var(--on-dark-2); }
.stats-band .section-head { text-align: center; }

/* ---------- 案例卡片 ---------- */
.case-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #CBD8F0; }
.case-media { position: relative; aspect-ratio: 3 / 2; overflow: hidden; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.case-card:hover .case-media img { transform: scale(1.06); }
.case-media .badge { position: absolute; top: 14px; left: 14px; }
.case-body { padding: 24px 26px 26px; }
.case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-body .client { font-size: 13.5px; color: var(--text-3); margin-bottom: 10px; }
.case-body p { font-size: 14px; color: var(--text-2); line-height: 1.8; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.case-tags .tag { font-size: 12px; color: var(--text-3); background: var(--bg-soft); padding: 3px 10px; border-radius: 999px; }
.case-metric { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line-2); display: flex; gap: 28px; }
.case-metric .m .v { font-family: 'Space Grotesk', sans-serif; font-size: 22px; font-weight: 700; color: var(--brand); }
.case-metric .m .v em { font-style: normal; font-size: 14px; margin-left: 1px; }
.case-metric .m .k { font-size: 12px; color: var(--text-3); }

/* ---------- 流程 ---------- */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
.process-item { padding: 0 28px; position: relative; }
.process-item:not(:last-child)::after {
  content: ''; position: absolute; top: 30px; right: 0; width: 44px; height: 2px;
  background: repeating-linear-gradient(90deg, var(--line-2) 0 6px, transparent 6px 12px);
}
.step-no {
  font-family: 'Space Grotesk', sans-serif; font-size: 15px; font-weight: 700; color: var(--brand);
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--brand-soft); border: 1px solid #CBD8F0; margin-bottom: 20px;
}
.process-item h3 { font-size: 18px; margin-bottom: 10px; }
.process-item p { font-size: 14px; color: var(--text-2); line-height: 1.85; }

/* ---------- 新闻卡片 ---------- */
.news-card { display: flex; flex-direction: column; }
.news-card .news-media { border-radius: var(--radius); overflow: hidden; aspect-ratio: 16 / 9; position: relative; }
.news-card .news-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.news-card:hover .news-media img { transform: scale(1.05); }
.news-meta { display: flex; align-items: center; gap: 12px; margin: 18px 0 10px; font-size: 13px; color: var(--text-3); }
.news-meta .date { font-family: 'Space Grotesk', sans-serif; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 8px; transition: color .2s; }
.news-card:hover h3 { color: var(--brand); }
.news-card .excerpt { font-size: 14px; color: var(--text-2); line-height: 1.8; }
.news-card .more { margin-top: auto; padding-top: 14px; display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--brand); }
.news-card .more .arr { transition: transform .25s var(--ease); }
.news-card:hover .more .arr { transform: translateX(4px); }

/* ---------- 新闻列表行 ---------- */
.news-row {
  display: grid; grid-template-columns: 340px 1fr; gap: 30px; align-items: center;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 20px; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.news-row:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #CBD8F0; }
.news-row .thumb { border-radius: var(--radius); overflow: hidden; aspect-ratio: 16 / 10; }
.news-row .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.news-row:hover .thumb img { transform: scale(1.05); }
.news-row .info .news-meta { margin-top: 0; }
.news-row .info h3 { font-size: 20px; line-height: 1.5; margin-bottom: 10px; transition: color .2s; }
.news-row:hover .info h3 { color: var(--brand); }
.news-row .info .excerpt { font-size: 14.5px; color: var(--text-2); line-height: 1.85; margin-bottom: 14px; }
.news-row .more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--brand); }
.news-row .more .arr { transition: transform .25s var(--ease); }
.news-row:hover .more .arr { transform: translateX(4px); }
@media (max-width: 720px) {
  .news-row { grid-template-columns: 1fr; gap: 18px; }
}

/* ---------- CTA 横幅 ---------- */
.cta-band { position: relative; padding: 88px 0; color: var(--on-dark); overflow: hidden; background-size: cover; background-position: center; }
.cta-band::before { content: ''; position: absolute; inset: 0; background: rgba(11, 18, 32, .82); }
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 720px; margin: 0 auto; }
.cta-inner h2 { color: var(--on-dark); font-size: clamp(26px, 3.4vw, 40px); line-height: 1.3; }
.cta-inner p { margin: 18px auto 36px; color: var(--on-dark-2); font-size: 16.5px; max-width: 560px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 模态框（案例详情） ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200; display: none;
  align-items: center; justify-content: center; padding: 24px;
}
.modal.open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(8, 14, 26, .66); backdrop-filter: blur(4px); }
.modal-panel {
  position: relative; z-index: 1; width: 100%; max-width: 880px; max-height: 88vh; overflow: auto;
  background: var(--bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
}
.modal-close {
  position: absolute; top: 16px; right: 16px; z-index: 2;
  width: 40px; height: 40px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(11, 18, 32, .55); color: #fff; transition: background .2s;
}
.modal-close:hover { background: var(--brand); }
.modal-cover { position: relative; aspect-ratio: 16 / 7; }
.modal-cover img { width: 100%; height: 100%; object-fit: cover; }
.modal-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(11,18,32,.5)); }
.modal-cover .badge { position: absolute; top: 18px; left: 18px; z-index: 2; }
.modal-body { padding: 32px 40px 40px; }
.modal-body h3 { font-size: 24px; margin-bottom: 6px; }
.modal-body .client { color: var(--text-3); font-size: 14px; margin-bottom: 18px; }
.modal-body .desc { color: var(--text-2); font-size: 15px; line-height: 1.9; margin-bottom: 26px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.metric-box { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 16px; text-align: center; }
.metric-box .v { font-family: 'Space Grotesk', sans-serif; font-size: 26px; font-weight: 700; color: var(--brand); }
.metric-box .v em { font-style: normal; font-size: 14px; }
.metric-box .k { font-size: 12.5px; color: var(--text-3); margin-top: 4px; }
.modal-points { margin-top: 26px; }
.modal-points h4 { font-size: 15px; margin-bottom: 12px; color: var(--ink); }
.modal-points ul li { position: relative; padding-left: 20px; font-size: 14.5px; color: var(--text-2); line-height: 1.9; }
.modal-points ul li::before { content: ''; position: absolute; left: 2px; top: 12px; width: 7px; height: 7px; border-radius: 2px; background: var(--brand); }
body.modal-open { overflow: hidden; }

/* ---------- 手风琴（FAQ） ---------- */
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; background: var(--bg); overflow: hidden; transition: border-color .25s; }
.faq-item.open { border-color: #CBD8F0; }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 26px; text-align: left; font-size: 16px; font-weight: 500; color: var(--ink);
}
.faq-q .icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line-2); display: inline-flex; align-items: center; justify-content: center; transition: transform .3s var(--ease), background .3s, border-color .3s; }
.faq-item.open .faq-q .icon { transform: rotate(45deg); background: var(--brand); border-color: var(--brand); color: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a-inner { padding: 0 26px 24px; font-size: 14.5px; color: var(--text-2); line-height: 1.95; }

/* ---------- 列表页（案例/新闻列表） ---------- */
.list-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn {
  height: 40px; padding: 0 20px; border-radius: 999px;
  border: 1px solid var(--line-2); background: var(--bg); color: var(--text-2);
  font-size: 14px; font-weight: 500; transition: all .2s var(--ease);
}
.filter-btn:hover { border-color: var(--brand); color: var(--brand); }
.filter-btn.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- 服务详情（产品页） ---------- */
.svc-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 56px 0; border-bottom: 1px solid var(--line); }
.svc-detail:last-of-type { border-bottom: none; }
.svc-detail.rev .svc-detail-media { order: 2; }
.svc-detail-media { position: relative; }
.svc-detail-media img { border-radius: var(--radius-lg); width: 100%; aspect-ratio: 4 / 3; object-fit: cover; box-shadow: var(--shadow-md); }
.svc-detail-media .badge { position: absolute; top: 16px; left: 16px; z-index: 2; }
.svc-detail-body .eyebrow { margin-bottom: 10px; }
.svc-detail-body h2 { font-size: 28px; margin-bottom: 14px; }
.svc-detail-body .desc { color: var(--text-2); font-size: 15.5px; line-height: 2; margin-bottom: 20px; }
.check-list li { position: relative; padding-left: 26px; font-size: 15px; color: var(--text); line-height: 2.1; }
.check-list li::before { content: ''; position: absolute; left: 0; top: 10px; width: 16px; height: 16px; border-radius: 50%; background: var(--brand-soft); }
.check-list li::after { content: ''; position: absolute; left: 4px; top: 14px; width: 8px; height: 4px; border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand); transform: rotate(-45deg); }
.scene-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.scene-tags .tag { font-size: 13px; color: var(--brand); background: var(--brand-soft); padding: 5px 14px; border-radius: 999px; }
.svc-cta { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
@media (max-width: 860px) {
  .svc-detail { grid-template-columns: 1fr; gap: 32px; padding: 44px 0; }
  .svc-detail.rev .svc-detail-media { order: 0; }
}

/* ---------- 关于页 ---------- */
.about-intro { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about-intro .text h2 { margin-bottom: 20px; }
.about-intro .text p { font-size: 15.5px; color: var(--text-2); line-height: 2; margin-bottom: 16px; }
.about-img { position: relative; }
.about-img img { border-radius: var(--radius-lg); width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.about-img .float-card {
  position: absolute; right: -18px; bottom: -22px;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-md); padding: 18px 24px; display: flex; align-items: center; gap: 14px;
}
.about-img .float-card .num { font-size: 30px; font-weight: 700; color: var(--brand); }
.about-img .float-card .t { font-size: 13px; color: var(--text-2); line-height: 1.5; }

/* 时间轴 */
.timeline { margin-top: 8px; }
.tl-row { display: grid; grid-template-columns: 96px 56px 1fr; gap: 0; padding: 0 0 40px; }
.tl-row:last-child { padding-bottom: 0; }
.tl-time { text-align: right; padding-right: 20px; padding-top: 6px; font-family: 'Space Grotesk', sans-serif; font-size: 17px; font-weight: 700; color: var(--brand); }
.tl-axis { position: relative; display: flex; justify-content: center; }
.tl-dot {
  width: 14px; height: 14px; border-radius: 50%; background: var(--brand);
  border: 3px solid #fff; box-shadow: 0 0 0 2px var(--brand);
  justify-self: center; margin-top: 9px; z-index: 1;
}
.tl-row:last-child .tl-dot { background: var(--brand-2); box-shadow: 0 0 0 2px var(--brand-2); }
.tl-axis::before {
  content: ''; position: absolute; top: 0; bottom: 0; width: 2px;
  background: var(--line-2); left: 50%; margin-left: -1px;
}
.tl-row:last-child .tl-axis::before { bottom: auto; height: 16px; }
.tl-body { padding-left: 24px; padding-top: 2px; }
.tl-body h3 { font-size: 17px; margin-bottom: 6px; }
.tl-body p { font-size: 14px; color: var(--text-2); line-height: 1.85; max-width: 480px; }

/* 价值观 */
.value-card { text-align: left; padding: 30px 28px; }
.value-card .feature-icon { margin-bottom: 18px; }

/* 团队/荣誉 */
.honor-grid .honor-item { display: flex; align-items: center; gap: 16px; padding: 20px 24px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); }
.honor-grid .honor-icon { width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; background: var(--brand-soft); color: var(--brand); }
.honor-grid .honor-icon svg { width: 22px; height: 22px; }
.honor-grid .honor-item h4 { font-size: 15.5px; margin-bottom: 3px; }
.honor-grid .honor-item p { font-size: 13px; color: var(--text-3); }

/* ============================================================
   联系页
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-cards { display: grid; gap: 16px; }
.contact-card { display: flex; gap: 18px; padding: 26px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); transition: box-shadow .3s, transform .3s; }
.contact-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.contact-ico { width: 50px; height: 50px; border-radius: 14px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; }
.contact-ico svg { width: 24px; height: 24px; }
.contact-card h3 { font-size: 17px; margin-bottom: 4px; }
.contact-card .t { font-size: 13.5px; color: var(--text-3); margin-bottom: 10px; }
.contact-card a, .contact-card .v { font-size: 15.5px; color: var(--ink); font-weight: 500; }
.contact-card a:hover { color: var(--brand); }
.contact-card .d { font-size: 13.5px; color: var(--text-2); margin-top: 6px; line-height: 1.8; }
.contact-aside .office-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; margin-bottom: 16px; }
.office-card h3 { font-size: 17px; margin-bottom: 4px; display: flex; align-items: center; gap: 10px; }
.office-card .city { font-size: 13px; color: var(--text-3); margin-bottom: 12px; }
.office-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.9; }
.office-card .badge { margin-top: 12px; }

/* ============================================================
   文章页（新闻详情）
   ============================================================ */
.article-wrap { max-width: 780px; margin: 0 auto; }
.article-head { text-align: center; margin-bottom: 40px; }
.article-head h1 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.35; margin: 20px 0 16px; }
.article-head .meta { display: flex; justify-content: center; align-items: center; gap: 14px; font-size: 14px; color: var(--text-3); flex-wrap: wrap; }
.article-head .meta .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--line-2); }
.article-cover { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 40px; }
.article-cover img { width: 100%; aspect-ratio: 16 / 7; object-fit: cover; }
.article-body p { font-size: 16px; line-height: 2.05; color: var(--text); margin-bottom: 22px; }
.article-body h2 { font-size: 22px; margin: 36px 0 16px; color: var(--ink); }
.article-body blockquote {
  margin: 28px 0; padding: 20px 26px; border-left: 4px solid var(--brand);
  background: var(--bg-soft); border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 15.5px; color: var(--text-2); line-height: 1.95;
}
.article-body ul { margin: 0 0 22px; }
.article-body ul li { position: relative; padding-left: 22px; font-size: 15.5px; line-height: 2; color: var(--text); }
.article-body ul li::before { content: ''; position: absolute; left: 2px; top: 13px; width: 8px; height: 8px; border-radius: 2px; background: var(--brand); }
.article-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.article-nav a { font-size: 14px; color: var(--text-2); display: inline-flex; align-items: center; gap: 8px; }
.article-nav a:hover { color: var(--brand); }

/* ============================================================
   404 / 空状态
   ============================================================ */
.empty-state { text-align: center; padding: 80px 0; }
.empty-state h2 { font-size: 28px; margin-bottom: 12px; }
.empty-state p { color: var(--text-2); margin-bottom: 28px; }

/* ============================================================
   滚动揭示 & 回顶
   ============================================================ */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].revealed { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }
[data-reveal][data-delay="3"] { transition-delay: .24s; }
[data-reveal][data-delay="4"] { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--ink); color: #fff; display: inline-flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all .3s var(--ease);
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--brand); }
.back-top svg { width: 18px; height: 18px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .grid-4, .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); row-gap: 36px; }
  .process-item:nth-child(2)::after { display: none; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .hero-scroll { display: none; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 99;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px; box-shadow: var(--shadow-md);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { justify-content: center; height: 48px; }
  .nav-toggle { display: inline-flex; }
  .header-cta .btn { display: none; }
  .about-intro, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-img .float-card { right: 12px; bottom: -18px; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: auto; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .grid-2, .grid-3, .grid-4, .grid-6 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-item::after { display: none !important; }
  .process-item { padding: 0; margin-bottom: 8px; }
  .hero-stats { grid-template-columns: 1fr; gap: 22px; padding-top: 24px; }
  .hero-actions .btn { width: 100%; }
  .tl-row { grid-template-columns: 72px 40px 1fr; }
  .tl-body { padding-left: 16px; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .modal-body { padding: 24px 20px 28px; }
  .article-body { font-size: 15px; }
  .cta-actions .btn { width: 100%; }
  .page-hero { padding: calc(var(--header-h) + 48px) 0 56px; }
}