/* =========================================================================
   风扬天顺 · 官网设计系统 (Design System)
   参考码匠云视觉语言 — 白底科技风 / 蓝色主色 / 编号章节 / 卡片网格 / 大数字
   纯静态、SSR 友好、GEO 兼容；中英文通过 html[data-lang] 切换
   ========================================================================= */

:root {
  /* 品牌色 */
  --primary: #2f6bff;
  --primary-600: #1f57f0;
  --primary-700: #1743c7;
  --accent: #06b6d4;
  --accent-soft: #e6f9fd;
  --warm: #b18d70;            /* 人文/关于板块点缀，禁止做主色 */

  /* 中性色 */
  --ink: #0d1b35;            /* 标题 */
  --text: #475569;          /* 正文 */
  --muted: #94a3b8;         /* 辅助 */
  --line: #e6ecf3;          /* 描边 */
  --bg: #ffffff;
  --bg-soft: #f5f8fc;       /* 浅蓝灰分区 */
  --bg-card: #ffffff;
  --bg-dark: #0b1b3a;       /* 深蓝（仅 hero 光斑/footer 可选） */
  --radius: 16px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 35, 75, .06), 0 2px 8px rgba(15, 35, 75, .05);
  --shadow-md: 0 8px 24px rgba(15, 35, 75, .08);
  --shadow-lg: 0 20px 48px rgba(15, 35, 75, .12);
  --container: 1200px;
  --nav-h: 72px;
  --ff: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--ff);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; padding: 0; }

/* ---------- layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(51px, 6.4vw, 92px) 0; }
.section--soft { background: linear-gradient(180deg, #f8faff 0%, #f5f8fc 50%, #f8faff 100%); }
.section--tight { padding: clamp(38px, 4.8vw, 64px) 0; }

/* ---------- typography ---------- */
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.6vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 23px); }
.lead { font-size: clamp(16px, 1.4vw, 19px); color: var(--text); }
.muted { color: var(--muted); }
.ink { color: var(--ink); }
.center { text-align: center; }
.gradient-text {
  background: linear-gradient(100deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- language toggle ---------- */
/* 默认显示中文，隐藏英文；切换到 en 模式时反转 */
.en { display: none !important; }
html[data-lang="en"] .en { display: inline !important; }
html[data-lang="en"] .zh { display: none !important; }
html[data-lang="en"] body { font-family: "Segoe UI", Roboto, Helvetica, Arial, system-ui, var(--ff); }
/* 语言切换按钮标签：与正文共用 data-lang 驱动，避免切换时闪动 */
.t-en { display: none !important; }
html[data-lang="en"] .t-en { display: inline !important; }
.t-zh { display: inline !important; }
html[data-lang="en"] .t-zh { display: none !important; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: all .25s cubic-bezier(.4, 0, .2, 1);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-600) 100%);
  color: #fff;
  box-shadow: 0 8px 24px -4px rgba(47,107,255,.45), 0 2px 8px rgba(47,107,255,.2);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px -6px rgba(47,107,255,.55), 0 4px 12px rgba(47,107,255,.25);
}
.btn-primary:active { transform: translateY(-1px); }
.btn-ghost {
  background: rgba(255,255,255,.8); color: var(--primary);
  border: 1.5px solid rgba(47,107,255,.18);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 8px 24px -8px rgba(47,107,255,.25);
  transform: translateY(-2px);
}
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------- eyebrow / section header ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 16px;
}
.eyebrow::before {
  content: ""; width: 32px; height: 2.5px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow::before { display: none; }
.section-head.center .eyebrow { justify-content: center; }
.section-head .title { margin-bottom: 14px; }
.section-head .title::after {
  content: ""; display: block; width: 48px; height: 3px; margin-top: 16px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
.section-head.center .title::after { margin-left: auto; margin-right: auto; }
.section-head .lead { color: var(--text); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .25s, box-shadow .25s;
}
.nav.scrolled { border-color: var(--line); box-shadow: var(--shadow-sm); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; color: var(--ink); font-size: 19px; letter-spacing: -.02em; }
.brand .logo-img {
  height: 56px; width: auto; max-width: 240px; border-radius: 8px;
  object-fit: contain; display: block; flex: none;
}
.brand small { display: block; font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: .12em; }
.nav-menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 14px; border-radius: 10px;
  font-weight: 600; color: var(--ink); font-size: 15px; transition: background .18s, color .18s;
}
.nav-link:hover, .nav-item.open > .nav-link { background: var(--bg-soft); color: var(--primary); }
.nav-link .caret { width: 14px; height: 14px; transition: transform .2s; }
.nav-item.open .caret { transform: rotate(180deg); }
.dropdown {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 620px; max-width: 92vw; background: transparent; border: none; border-radius: 0;
  box-shadow: none; padding: 0; opacity: 0; visibility: hidden; transition: .2s; z-index: 20;
}
.nav-item.open .dropdown, .nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-panel {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  box-shadow: 0 24px 60px rgba(15,35,75,.14); padding: 14px;
}
.dropdown-grid {
  display: grid;
  grid-template-columns: repeat(var(--dd-cols, 3), minmax(0, 1fr));
  gap: 7px;
}
.dropdown-item {
  display: flex; gap: 12px; align-items: flex-start; padding: 13px 14px; border-radius: 12px;
  color: var(--text); transition: background .18s, transform .18s;
}
.dropdown-item:hover { background: var(--bg-soft); color: var(--primary); transform: translateY(-2px); }
.dropdown-item .di { width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, #eef3ff, #e6f9fd); color: var(--primary); display: grid; place-items: center; flex: none; }
.dropdown-item .di.di--img { border-radius: 10px; background: transparent; padding: 0; overflow: hidden; }
.di-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dropdown-item .di svg { width: 20px; height: 20px; }
.dropdown-item .dt { display: block; min-width: 0; }
.dropdown-item .dt b { display: block; color: var(--ink); font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.dropdown-item:hover .dt b { color: var(--primary); }
.dropdown-item .dt span { display: block; font-size: 12px; color: var(--muted); line-height: 1.45; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: 6px; }
.lang-toggle {
  display: none;
}
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-600));
  color: #fff; padding: 10px 22px; border-radius: 999px; font-weight: 700; font-size: 14px;
  box-shadow: 0 8px 20px -4px rgba(47,107,255,.45), 0 2px 8px rgba(47,107,255,.2);
  transition: all .25s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -6px rgba(47,107,255,.55); }
.menu-btn { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1.5px solid var(--line); place-items: center; color: var(--ink); }
.menu-btn svg { width: 22px; height: 22px; }

/* mobile drawer */
.mobile-menu { position: fixed; inset: 0; z-index: 200; background: rgba(8,18,40,.5); opacity: 0; visibility: hidden; transition: .25s; }
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-panel { position: absolute; top: 0; right: 0; bottom: 0; width: min(86vw, 360px); background: #fff; padding: 22px; overflow-y: auto; transform: translateX(100%); transition: transform .3s; }
.mobile-menu.open .mobile-panel { transform: translateX(0); }
.mobile-panel .top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.mobile-link { display: flex; justify-content: space-between; align-items: center; padding: 14px 4px; border-bottom: 1px solid var(--line); font-weight: 600; color: var(--ink); font-size: 16px; }
.mobile-sub a { display: block; padding: 11px 14px; color: var(--text); border-radius: 10px; }
.mobile-sub a:hover { background: var(--bg-soft); }
.mobile-sub { margin: 4px 0 8px 6px; }

/* ---------- hero (深色沉浸式) ---------- */
.hero--dark {
  position: relative; overflow: hidden;
  min-height: 640px;
  display: flex; align-items: center;
  padding: clamp(65px, 9vw, 117px) 0 clamp(58px, 7.2vw, 90px);
  background: linear-gradient(180deg, #fbfdff 0%, #f4f8ff 40%, #eef4ff 70%, #f8fbff 100%);
  color: var(--ink);
}
/* 背景光斑层 — 浅色、低调 */
.hero--dark .hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero--dark .hero-bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(700px 420px at 12% 18%, rgba(47,107,255,.08), transparent 55%),
    radial-gradient(600px 360px at 88% 22%, rgba(6,182,212,.06), transparent 55%),
    radial-gradient(500px 300px at 50% 100%, rgba(99,102,241,.05), transparent 60%);
}
/* 科技网格 — 浅色 */
.hero--dark .hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(47,107,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47,107,255,.04) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(900px 500px at 50% 30%, #000, transparent 75%);
  mask-image: radial-gradient(900px 500px at 50% 30%, #000, transparent 75%);
}
/* 漂浮光球 — 极淡，作为装饰不抢视觉 */
.hero-orbs { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .35; }
.orb--1 { width: 260px; height: 260px; top: -60px; left: -40px; background: rgba(47,107,255,.12); animation: float1 8s ease-in-out infinite; }
.orb--2 { width: 220px; height: 220px; top: 20%; right: -30px; background: rgba(6,182,212,.10); animation: float2 10s ease-in-out infinite; }
.orb--3 { width: 180px; height: 180px; bottom: -50px; left: 35%; background: rgba(99,102,241,.08); animation: float3 12s ease-in-out infinite; }
@keyframes float1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(20px,30px); } }
@keyframes float2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-25px,-20px); } }
@keyframes float3 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(15px,-25px); } }

.hero--dark .container { position: relative; z-index: 2; }
.hero-grid2 { display: grid; grid-template-columns: 1.08fr .92fr; gap: 50px; align-items: center; }

/* 左侧内容 */
.hero-content { max-width: 600px; }
.eyebrow--light {
  color: var(--primary);
}
.eyebrow--light::before {
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.hero-title {
  margin-bottom: 20px; font-size: clamp(38px, 5.5vw, 64px);
  font-weight: 900; line-height: 1.1; letter-spacing: -.02em;
  color: var(--ink);
}
.hero-lead {
  max-width: 540px; margin-bottom: 28px; color: var(--text);
  font-size: clamp(15px, 1.3vw, 18px); line-height: 1.75;
}

/* Hero 专用按钮 */
.btn-glow {
  background: linear-gradient(135deg, var(--primary), var(--primary-600));
  color: #fff;
  box-shadow: 0 8px 28px -4px rgba(47,107,255,.45);
}
.btn-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 38px -6px rgba(47,107,255,.55);
}
.btn-outline {
  background: rgba(47,107,255,.06);
  color: var(--primary);
  border: 1.5px solid rgba(47,107,255,.25);
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  background: rgba(47,107,255,.12);
  border-color: rgba(47,107,255,.45);
  transform: translateY(-2px);
}

/* 右侧 AI 演示面板 — 浅色主题 */
.hero-visual { position: relative; }
.ai-demo {
  background: #ffffff;
  border: 1px solid #e8eef7;
  border-radius: 18px;
  box-shadow: 0 24px 48px -12px rgba(47,107,255,.12), 0 8px 24px -8px rgba(15,35,75,.08);
  overflow: hidden;
  height: 480px;
  display: flex; flex-direction: column;
}
.ai-demo__header {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: #f8faff;
  border-bottom: 1px solid #eef2f9;
}
.ai-demo__dots { display: flex; gap: 6px; }
.ai-demo__dots i { width: 11px; height: 11px; border-radius: 50%; background: #dbe4f0; }
.ai-demo__dots i:nth-child(1) { background: #ff5f57; }
.ai-demo__dots i:nth-child(2) { background: #ffbd2e; }
.ai-demo__dots i:nth-child(3) { background: #28c840; }
.ai-demo__title { font-size: 13px; font-weight: 700; color: var(--ink); flex: 1; }
.ai-demo__live { display: flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; color: #16a34a; padding: 4px 10px; border-radius: 999px; background: #dcfce7; }
.live-dot { width: 6px; height: 6px; border-radius: 50%; background: #16a34a; animation: pulse 1.5s infinite; }

.ai-demo__tabs { display: flex; gap: 4px; padding: 8px 12px 0; background: #f8faff; border-bottom: 1px solid #eef2f9; }
.ai-tab {
  flex: 1; padding: 8px 4px; border-radius: 10px 10px 0 0;
  font-size: 11.5px; font-weight: 600; color: #64748b;
  background: transparent; border: none; border-bottom: 2px solid transparent;
  cursor: pointer; transition: all .2s; text-align: center;
}
.ai-tab:hover { color: var(--primary); }
.ai-tab.active { color: var(--primary); background: #ffffff; border-bottom-color: var(--primary); }

.ai-demo__body { padding: 12px; flex: 1; overflow: hidden; background: #ffffff; }
.ai-scene { display: none; height: 100%; }
.ai-scene.active { display: block; }

/* === 场景1: AI 视觉质检 === */
.ai-scan { display: flex; gap: 8px; }
.ai-scan__viewport {
  flex: 1; position: relative; aspect-ratio: 16/10; max-height: 210px;
  border-radius: 12px; overflow: hidden;
  background: linear-gradient(135deg, #f1f5ff 0%, #e8f0fe 100%); border: 1px solid #dbe4f7;
}
.ai-scan__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(47,107,255,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47,107,255,.12) 1px, transparent 1px);
  background-size: 24px 24px;
}
.ai-scan__sweep {
  position: absolute; top: 0; left: 0; bottom: 0; width: 40%;
  background: linear-gradient(90deg, transparent, rgba(47,107,255,.12), transparent);
  animation: sweep 3s linear infinite;
}
@keyframes sweep { 0% { left: -40%; } 100% { left: 100%; } }
.ai-defect {
  position: absolute; width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid #ef4444; background: rgba(239,68,68,.15);
  animation: defectPulse 1.5s infinite;
}
.ai-defect[data-type="dent"] { border-color: #f59e0b; background: rgba(245,158,11,.15); }
.ai-defect[data-type="stain"] { border-color: #8b5cf6; background: rgba(139,92,246,.15); }
@keyframes defectPulse { 0%,100% { transform: scale(1); opacity: .8; } 50% { transform: scale(1.2); opacity: 1; } }
.ai-scan__crosshair { position: absolute; width: 100%; height: 100%; pointer-events: none; }
.ai-scan__crosshair::before, .ai-scan__crosshair::after { content: ""; position: absolute; background: rgba(47,107,255,.25); }
.ai-scan__crosshair::before { width: 100%; height: 1px; top: 50%; }
.ai-scan__crosshair::after { width: 1px; height: 100%; left: 50%; }

.ai-scan__stats { width: 92px; display: flex; flex-direction: column; gap: 8px; }
.ai-stat { background: #f8faff; border: 1px solid #eef2f9; border-radius: 10px; padding: 6px 8px; }
.ai-stat__label { display: block; font-size: 10px; color: #64748b; margin-bottom: 1px; }
.ai-stat b { font-size: 15px; font-weight: 800; color: var(--primary); }

.ai-log {
  margin-top: 6px; max-height: 78px; overflow: hidden;
  background: #f8faff; border: 1px solid #eef2f9; border-radius: 10px; padding: 6px 8px;
  font-family: "SF Mono", "Fira Code", monospace; font-size: 10px; line-height: 1.35;
}
.ai-log__line { display: flex; align-items: center; gap: 8px; padding: 2px 0; line-height: 1.35; }
.ai-log__time { color: #94a3b8; }
.ai-log__tag { font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 4px; }
.ai-log__tag--ok { background: #dcfce7; color: #16a34a; }
.ai-log__tag--warn { background: #fef3c7; color: #d97706; }
.ai-log__tag--alert { background: #fee2e2; color: #dc2626; }
.ai-log__msg { color: #475569; }

/* === 场景2: 知识问答 === */
.ai-chat { display: flex; flex-direction: column; gap: 10px; }
.ai-chat__msg { display: flex; gap: 8px; }
.ai-chat__msg--user { justify-content: flex-end; }
.ai-chat__msg--bot { align-items: flex-start; }
.ai-chat__avatar {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; font-size: 10px; font-weight: 800; color: #fff;
}
.ai-chat__bubble {
  max-width: 80%; padding: 9px 12px; border-radius: 12px;
  font-size: 12px; line-height: 1.5; color: #334155;
}
.ai-chat__msg--user .ai-chat__bubble { background: linear-gradient(135deg, var(--primary), var(--primary-600)); color: #fff; }
.ai-chat__msg--bot .ai-chat__bubble { background: #f8faff; border: 1px solid #eef2f9; color: #334155; }
.ai-chat__list { margin: 4px 0; padding-left: 0; list-style: none; }
.ai-chat__list li { padding: 1px 0; font-size: 11.5px; }
.ai-chat__source { margin-top: 4px; font-size: 10.5px; color: #64748b; }
.ai-chat__typing { display: flex; gap: 4px; padding-left: 34px; }
.ai-chat__typing span { width: 7px; height: 7px; border-radius: 50%; background: #cbd5e1; animation: typing 1.2s infinite; }
.ai-chat__typing span:nth-child(2) { animation-delay: .2s; }
.ai-chat__typing span:nth-child(3) { animation-delay: .4s; }
@keyframes typing { 0%,60%,100% { opacity: .3; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-4px); } }

/* === 场景3: 合规审查 === */
.ai-comp { display: flex; flex-direction: column; gap: 10px; }
.ai-comp__doc { display: flex; flex-direction: column; gap: 1px; }
.ai-comp__line {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: 10px;
  background: #f8faff; border: 1px solid #eef2f9;
  font-size: 12px; color: #475569;
}
.ai-comp__line.checked { color: #16a34a; background: #f0fdf4; }
.ai-comp__line.checking { color: var(--primary); border-color: #dbe4f7; background: #eff6ff; }
.ai-comp__line > span:first-child { flex: 1; }
.ai-comp__ok { color: #16a34a; font-weight: 700; }
.ai-comp__pending { color: #cbd5e1; font-size: 16px; }
.ai-comp__spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid #dbe4f7; border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.ai-comp__bar { height: 5px; background: #e2e8f0; border-radius: 3px; overflow: hidden; }
.ai-comp__progress { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 3px; animation: progressLoad 3s ease infinite; }
@keyframes progressLoad { 0% { width: 45%; } 50% { width: 65%; } 100% { width: 45%; } }
.ai-comp__summary { display: flex; gap: 8px; }
.ai-comp__metric { flex: 1; text-align: center; background: #f8faff; border: 1px solid #eef2f9; border-radius: 10px; padding: 8px; }
.ai-comp__metric b { display: block; font-size: 17px; font-weight: 800; color: var(--primary); }
.ai-comp__metric span { font-size: 10.5px; color: #64748b; }

/* === 场景4: 智能体开发 === */
.ai-agent { display: flex; flex-direction: column; gap: 12px; height: 100%; }
.ai-agent__flow {
  display: flex; align-items: center; justify-content: space-between; gap: 4px;
  background: #f8faff; border: 1px solid #eef2f9;
  border-radius: 14px; padding: 12px 10px;
}
.ai-agent__node {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  flex: 1; text-align: center; opacity: .45;
  transition: opacity .3s;
}
.ai-agent__node.active { opacity: 1; }
.ai-agent__node.active .ai-agent__icon {
  background: linear-gradient(135deg, #dbeafe, #e0f2fe);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47,107,255,.12);
}
.ai-agent__icon {
  width: 32px; height: 32px; border-radius: 9px;
  display: grid; place-items: center; font-size: 15px;
  background: #ffffff; border: 1px solid #dbe4f7;
  transition: all .3s;
}
.ai-agent__name { font-size: 10px; color: #475569; font-weight: 600; }
.ai-agent__arrow {
  width: 12px; height: 2px; background: #cbd5e1; border-radius: 1px;
  position: relative; flex-shrink: 0;
}
.ai-agent__arrow::after {
  content: ""; position: absolute; right: 0; top: -3px;
  width: 0; height: 0; border-left: 4px solid #cbd5e1;
  border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}
.ai-agent__tools {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px;
}
.ai-tool {
  display: flex; align-items: center; gap: 8px;
  background: #f8faff; border: 1px solid #eef2f9;
  border-radius: 10px; padding: 8px 10px; font-size: 11.5px; color: #475569;
}
.ai-tool__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 8px rgba(47,107,255,.35); }
.ai-tool--add {
  justify-content: center; color: #94a3b8;
  border-style: dashed; background: transparent;
}
.ai-agent__stats {
  display: flex; gap: 8px; margin-top: auto;
}
.ai-agent__metric {
  flex: 1; text-align: center; background: #f8faff; border: 1px solid #eef2f9;
  border-radius: 10px; padding: 8px;
}
.ai-agent__metric b { display: block; font-size: 17px; font-weight: 800; color: var(--primary); }
.ai-agent__metric span { font-size: 10.5px; color: #64748b; }

/* 响应式 */
@media (max-width: 980px) {
  .hero-grid2 { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
}
@media (max-width: 640px) {
  .hero-visual { width: 100%; max-width: none; margin: 0; }
  .ai-demo { border-radius: 14px; }
  .ai-scan { flex-direction: column; gap: 6px; }
  .ai-scan__viewport { max-height: 170px; border-radius: 10px; }
  .ai-scan__stats { width: 100%; flex-direction: row; gap: 6px; }
  .ai-stat { padding: 5px 6px; border-radius: 8px; flex: 1; text-align: center; }
  .ai-stat__label { font-size: 9px; }
  .ai-stat b { font-size: 13px; }
  .ai-log { max-height: 62px; padding: 5px 6px; border-radius: 8px; }
  .ai-log__line { gap: 6px; padding: 1px 0; line-height: 1.3; }
  .ai-log__msg { font-size: 9.5px; }
  .ai-log__tag { font-size: 9px; padding: 1px 5px; }
  .ai-comp { gap: 6px; }
  .ai-comp__line { padding: 6px 10px; font-size: 11.5px; border-radius: 8px; }
  .ai-comp__bar { height: 4px; }
  .ai-comp__summary { gap: 6px; }
  .ai-comp__metric { padding: 6px; border-radius: 8px; }
  .ai-comp__metric b { font-size: 15px; }
  .ai-comp__metric span { font-size: 9px; }
  .ai-demo { height: 440px; }
}

/* trust strip - industry coverage */
.trust {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(620px 260px at 92% 50%, rgba(43,108,255,.06), transparent 60%),
    radial-gradient(500px 200px at 5% 50%, rgba(6,182,212,.04), transparent 55%),
    linear-gradient(180deg, #fbfcff 0%, #f6f9ff 100%);
  position: relative;
  overflow: hidden;
}
.trust .container {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 32px 24px;
  position: relative;
  z-index: 1;
}
.trust-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.trust-header > div { display: flex; flex-direction: column; gap: 6px; }
.trust .label {
  font-size: 12px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.trust-header strong {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
}
.trust-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #06b6d4);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 0 8px 20px -8px rgba(43,108,255,.35);
}
.trust .logos {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.trust .logos .ind-chip {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  background: #fff;
  border: 1px solid #dbe6fb;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, color .2s ease;
}
.trust .logos .ind-chip:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 10px 22px -10px rgba(43,108,255,.25);
}

/* ---------- grids & cards ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-2 > * { min-width: 0; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); } /* 6 items in 2 rows */

.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; transition: all .3s cubic-bezier(.4, 0, .2, 1);
  display: flex; flex-direction: column; height: 100%;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0; transition: opacity .3s;
}
.card:hover {
  transform: translateY(-6px); box-shadow: 0 20px 48px -12px rgba(15,35,75,.14), 0 4px 12px rgba(15,35,75,.06);
  border-color: transparent;
}
.card:hover::before { opacity: 1; }
.card .ico {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent-soft), #e8eeff); color: var(--primary); margin-bottom: 16px;
  transition: transform .3s;
}
.card:hover .ico { transform: scale(1.08) rotate(-2deg); }
.card .ico.ico--img { border-radius: 14px; background: transparent; padding: 0; overflow: hidden; }
.ico-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .ico svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 10px; font-size: 19px; }
.card p { font-size: 14.5px; color: var(--text); flex: 1; line-height: 1.65; }
.card .more { margin-top: 14px; display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 700; font-size: 14px; }
.card .more svg { width: 16px; height: 16px; transition: transform .2s; }
.card:hover .more svg { transform: translateX(4px); }

/* feature row (numbered) */
.feature {
  display: grid; grid-template-columns: 64px 1fr; gap: 18px; padding: 22px 0;
  border-top: 1px solid var(--line); align-items: start;
  transition: padding-left .25s;
}
.feature:hover { padding-left: 8px; }
.feature:last-child { border-bottom: 1px solid var(--line); }
.feature .num {
  font-size: 28px; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; font-variant-numeric: tabular-nums;
}
.feature h3 { margin-bottom: 6px; font-size: 18px; }
.feature p { font-size: 14.5px; }

/* 产品页 · 能力详解 */
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.capability-cell { display: grid; grid-template-columns: 44px 1fr; gap: 14px; padding: 18px 18px 16px; border: 1px solid var(--line); border-radius: 12px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; color: inherit; }
.capability-cell:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(15,30,60,.08); border-color: transparent; }
.capability-cell .cap-ico { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft); color: var(--primary); }
.capability-cell .cap-ico svg { width: 22px; height: 22px; }
.capability-cell h4 { font-size: 16px; color: var(--ink); margin-bottom: 4px; }
.capability-cell p { font-size: 13.5px; line-height: 1.65; color: #5d6b85; }

/* section 副文案 */
.section-sub { margin-top: 10px; max-width: 680px; color: #5d6b85; font-size: 15px; }


@media (max-width: 880px) {
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .capability-grid { grid-template-columns: 1fr; }
}

/* numbered section label (01 / 07) */
.sec-index { font-size: 13px; font-weight: 800; color: var(--muted); letter-spacing: .1em; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; text-align: left; position: relative; overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}
.stat::before {
  content: ""; position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 3px;
}
.stat:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat b {
  display: block; font-size: clamp(34px, 4vw, 46px); font-weight: 800;
  background: linear-gradient(135deg, var(--ink) 0%, var(--primary) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1; letter-spacing: -.02em;
}
.stat b .u { font-size: 20px; color: var(--primary); margin-left: 2px; -webkit-text-fill-color: var(--primary); }
.stat span { display: block; margin-top: 10px; color: var(--text); font-size: 14.5px; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 24px 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: all .25s; overflow: hidden; }
.step::after { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); opacity: 0; transition: opacity .25s; }
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step:hover::after { opacity: 1; }
.step::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 18px; right: 22px; font-size: 30px; font-weight: 800; color: var(--accent-soft); }
.step .ico { width: 46px; height: 46px; border-radius: 12px; background: var(--accent-soft); color: var(--primary); display: grid; place-items: center; margin-bottom: 11px; }
.step .ico svg { width: 23px; height: 23px; }
.step h3 { font-size: 17px; font-weight: 800; color: #0f172a; margin: 0 0 14px; letter-spacing: 0.2px; }
.step p { font-size: 13.5px; font-weight: 400; line-height: 1.75; color: #1f2937; margin: 0; }

/* split / two-column feature block */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; align-items: center; }
.split .visual { }
.split .visual svg { width: 100%; }
.split .visual img { width: 100%; height: auto; border-radius: var(--radius-lg); display: block; }
.check-list { display: grid; gap: 11px; margin-top: 18px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; }
.check-list .ck { flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--accent-soft); color: var(--primary); display: grid; place-items: center; margin-top: 2px; }
.check-list .ck svg { width: 14px; height: 14px; }
.check-list b { color: var(--ink); }

/* 产品级 KPI 数字带（能力概览区，区别于核心特性明细，避免内容重复） */
.kpi-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.kpi {
  border: 1px solid var(--line); border-radius: 14px; padding: 18px 18px;
  background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
  transition: all .25s; position: relative; overflow: hidden;
}
.kpi::before {
  content: ""; position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent)); border-radius: 3px;
  opacity: 0; transition: opacity .25s;
}
.kpi:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: transparent; }
.kpi:hover::before { opacity: 1; }
.kpi__v { font-weight: 700; color: var(--ink); font-size: 15px; line-height: 1.45; }
.kpi__l { margin-top: 6px; color: var(--muted); font-size: 12px; letter-spacing: .02em; }
@media (max-width: 640px) { .kpi-row { grid-template-columns: 1fr; } }

/* tags */
.tags { display: flex; flex-wrap: wrap; gap: 9px; }
.tag { font-size: 12.5px; font-weight: 600; color: var(--primary); background: var(--accent-soft); padding: 6px 13px; border-radius: 999px; }

/* breadcrumb */
.breadcrumb { padding: 22px 0 0; font-size: 13.5px; color: var(--muted); }
.breadcrumb a { color: var(--text); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span.sep { margin: 0 9px; color: var(--line); }
.breadcrumb span.cur { color: var(--ink); font-weight: 600; }

/* page hero (interior) */
.page-hero { padding: clamp(38px, 4.8vw, 64px) 0 clamp(27px, 3.2vw, 42px); }
.page-hero h1 { margin: 12px 0 16px; }
.page-hero .lead { max-width: 680px; }

/* subpage layout: sidebar + content */
.sub-layout { display: grid; grid-template-columns: 250px 1fr; gap: 38px; align-items: start; }
.sidebar { position: sticky; top: calc(var(--nav-h) + 20px); }
.sidebar .s-title { font-size: 13px; font-weight: 800; color: var(--muted); letter-spacing: .1em; margin-bottom: 12px; }
.sidebar a { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 10px; color: var(--text); font-weight: 600; font-size: 15px; border: 1px solid transparent; }
.sidebar a:hover { background: var(--bg-soft); }
.sidebar a.active { background: #fff; color: var(--primary); border-color: #d3e0f7; box-shadow: var(--shadow-sm); }
.sidebar a .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: none; }
.sidebar a.active .dot { background: var(--primary); }

/* article / list items */
.list-item { display: grid; grid-template-columns: 120px 1fr; gap: 22px; padding: 21px 0; border-top: 1px solid var(--line); }
.list-item:last-child { border-bottom: 1px solid var(--line); }
.list-item .date { color: var(--primary); font-weight: 700; font-size: 14px; }
.list-item .cat { display: inline-block; margin-top: 6px; font-size: 12px; color: var(--muted); }
.list-item h3 { font-size: 19px; margin-bottom: 8px; }
.list-item h3 a:hover { color: var(--primary); }
.list-item p { font-size: 14.5px; color: var(--text); }
.list-item--insight { grid-template-columns: 150px 1fr; }
.list-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  background: #eef3ff;
}
.list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.list-item--insight:hover .list-thumb img { transform: scale(1.04); }

/* homepage insight cards */
.insight-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .28s ease, border-color .2s ease;
}
.insight-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 20px 48px -12px rgba(15,35,75,.16), 0 4px 12px rgba(15,35,75,.06);
}
.insight-card::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0; transition: opacity .3s;
}
.insight-card:hover::after { opacity: 1; }
.insight-card__thumb {
  height: 150px;
  overflow: hidden;
  background: #eef3ff;
}
.insight-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.insight-card:hover .insight-card__thumb img { transform: scale(1.04); }
.insight-card__body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.insight-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12.5px;
}
.insight-card__meta .cat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
  background: #eef3ff;
  color: var(--primary);
}
.insight-card__meta time { color: var(--muted); font-variant-numeric: tabular-nums; }
.insight-card__body h3 {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--ink);
}
.insight-card__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

@media (max-width: 860px) {
  .insight-card__thumb { height: 140px; }
  .insight-card__body { padding: 16px 18px 18px; }
  .insight-card__body h3 { font-size: 16px; }
}

/* case cards */
.case-card { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; display: flex; flex-direction: column; transition: all .3s cubic-bezier(.4,0,.2,1); }
.case-card:hover { transform: translateY(-6px); box-shadow: 0 20px 48px -12px rgba(15,35,75,.16); }
.case-card .case-cover--img img { transition: transform .4s; }
.case-card:hover .case-cover--img img { transform: scale(1.06); }
.case-cover { height: 180px; background: linear-gradient(135deg, var(--primary), var(--accent)); position: relative; display: grid; place-items: center; color: #fff; }
.case-cover .big { font-size: 34px; font-weight: 800; opacity: .9; letter-spacing: .04em; }
.case-card .case-cover--img { padding: 0; overflow: hidden; }
.case-card .case-cover--img img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.case-body { padding: 18px; }
.case-body .tags { margin-bottom: 12px; }
.case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-body p { font-size: 14px; }

/* rich case cards (cases.html) */
.case-list { display: grid; gap: 28px; }
.case-card--rich { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); background: #fff; transition: all .3s cubic-bezier(.4,0,.2,1); }
.case-card--rich:hover { transform: translateY(-5px); box-shadow: 0 24px 56px -16px rgba(15,35,75,.16); border-color: transparent; }
.case-card--rich .case-header { display: grid; grid-template-columns: 170px 1fr; gap: 0; }
.case-card--rich.case-card--img .case-header { grid-template-columns: 280px 1fr; }
.case-card--rich .case-cover { height: auto; min-height: 100%; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.case-card--rich .case-cover .big { font-size: 44px; font-weight: 800; opacity: .95; letter-spacing: .04em; }
.case-card--rich .case-cover--img { padding: 0; overflow: hidden; }
.case-card--rich .case-cover--img img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.case-card--rich .case-intro { padding: 24px 26px; position: relative; }
.case-card--rich .case-intro .tags { margin-bottom: 14px; padding-right: 130px; }
.case-card--rich .case-intro h3 { font-size: 22px; margin-bottom: 10px; color: var(--ink); }
.case-card--rich .case-intro p { font-size: 15px; color: var(--text); line-height: 1.65; }
.case-card--rich .case-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.case-card--rich .case-col { padding: 22px 24px; border-right: 1px solid var(--line); }
.case-card--rich .case-col:last-child { border-right: none; }
.case-card--rich .case-col h4 { font-size: 15px; font-weight: 800; color: var(--primary); margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.case-card--rich .case-col h4::before { content: ""; width: 4px; height: 16px; background: var(--primary); border-radius: 2px; }
.case-card--rich .case-col p { font-size: 13.5px; margin-bottom: 10px; color: var(--text); line-height: 1.6; }
.case-card--rich .case-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.case-card--rich .case-col li { font-size: 13.5px; color: var(--text); padding-left: 18px; position: relative; line-height: 1.65; }
.case-card--rich .case-col li::before { content: ""; position: absolute; left: 0; top: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.case-card--rich .case-results li::before { background: #22c55e; }
.tag--primary { background: var(--primary); color: #fff; }

@media (max-width: 980px) {
  .case-card--rich .case-header,
  .case-card--rich.case-card--img .case-header { grid-template-columns: 1fr; }
  .case-card--rich .case-cover { height: 120px; min-height: auto; }
  .case-card--rich.case-card--img .case-cover { height: 200px; }
  .case-card--rich .case-columns { grid-template-columns: 1fr; }
  .case-card--rich .case-col { border-right: none; border-bottom: 1px solid var(--line); }
  .case-card--rich .case-col:last-child { border-bottom: none; }
  .case-card--rich .case-intro .tags { padding-right: 110px; }
}

/* CTA band */
.cta-band {
  background:
    linear-gradient(135deg, var(--primary-700) 0%, var(--primary) 50%, var(--accent) 100%);
  color: #fff; border-radius: var(--radius-lg); padding: clamp(36px, 5vw, 56px);
  text-align: center; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; top: -50%; left: -10%; width: 60%; height: 200%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,.12), transparent 60%);
  pointer-events: none;
}
.cta-band::after {
  content: ""; position: absolute; top: 0; right: 0; width: 400px; height: 100%;
  background: radial-gradient(ellipse at 80% 30%, rgba(6,182,212,.25), transparent 60%);
  pointer-events: none;
}
.cta-band h2 { color: #fff; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-band p { color: rgba(255,255,255,.9); max-width: 620px; margin: 0 auto 24px; position: relative; z-index: 1; }
.cta-band .btn-ghost { background: #fff; color: var(--primary); border-color: #fff; position: relative; z-index: 1; }
.cta-band .btn-ghost:hover { background: rgba(255,255,255,.92); }
.cta-band .btn-primary { background: rgba(255,255,255,.15); backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,.3); position: relative; z-index: 1; }
.cta-band .btn-primary:hover { background: rgba(255,255,255,.25); }

/* FAQ 折叠卡片 */
.faq { width: 100%; }
.faq-list { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 8px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; transition: border-color .2s, box-shadow .2s;
}
.faq-item:hover { border-color: #c9d8f2; box-shadow: 0 6px 20px rgba(43,108,255,.06); }
.faq-item[open] { border-color: rgba(43,108,255,.45); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 11px;
  padding: 14px 18px; font-weight: 700; font-size: 16.5px; color: var(--ink);
  position: relative; transition: color .2s;
  min-height: 56px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: ""; width: 26px; height: 26px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, #eef4ff, #e2ecff);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232b6cff' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center; background-size: 14px;
  transition: transform .25s;
}
.faq-item[open] summary::before { transform: rotate(45deg); }
.faq-item[open] summary { color: var(--primary); }
.faq-item summary::after {
  content: ""; margin-left: auto; width: 10px; height: 10px; flex: none;
  border-right: 2px solid #b7c6dd; border-bottom: 2px solid #b7c6dd;
  transform: rotate(45deg); transition: transform .25s, border-color .2s;
}
.faq-item[open] summary::after { transform: rotate(-135deg); border-color: var(--primary); }
.faq-item > div { padding: 0 18px 14px 54px; }
.faq-item p { font-size: 15px; line-height: 1.8; color: var(--text); margin: 0; }
.faq-more {
  display: inline-flex; align-items: center; gap: 6px;
  margin: 10px 0 2px;
  color: var(--primary); font-size: 14px; font-weight: 700; text-decoration: none;
}
.faq-more:hover { text-decoration: underline; }
.faq-more svg { transition: transform .2s ease; }
.faq-more:hover svg { transform: translateX(4px); }

/* contact form */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid > * { min-width: 0; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.field input, .field textarea, .field select {
  width: 100%; min-width: 0;
  border: 1.5px solid var(--line); border-radius: 11px; padding: 12px 14px; font-family: inherit; font-size: 15px; color: var(--ink); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(47,107,255,.12); }
.field textarea { min-height: 120px; resize: vertical; }

/* info list (contact) */
.info-list { display: grid; gap: 14px; }
.info-row { display: flex; gap: 14px; align-items: flex-start; }
.info-row .ic { width: 42px; height: 42px; border-radius: 11px; background: var(--accent-soft); color: var(--primary); display: grid; place-items: center; flex: none; }
.info-row .ic svg { width: 21px; height: 21px; }
.info-row b { display: block; color: var(--ink); font-size: 15px; }
.info-row span { color: var(--text); font-size: 14px; }

/* timeline */
.timeline { position: relative; padding-left: 24px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 5px; bottom: 5px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 27px 0; }
.tl-item::before { content: ""; position: absolute; left: -24px; top: 5px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 4px solid var(--primary); }
.tl-item .yr { font-weight: 800; color: var(--primary); font-size: 17px; }
.tl-item h3 { font-size: 18px; margin: 4px 0 6px; }
.tl-item p { font-size: 14.5px; }

/* quote */
.quote { background: var(--bg-soft); border-radius: var(--radius); padding: 24px 26px; border-left: 4px solid var(--primary); }
.quote p { font-size: 17px; color: var(--ink); font-weight: 600; }
.quote footer { margin-top: 10px; font-size: 14px; color: var(--muted); }

/* compliance note */
.note { font-size: 13px; color: var(--muted); background: #fff; border: 1px dashed var(--line); border-radius: 10px; padding: 12px 16px; margin-top: 14px; }

/* ---------- footer ---------- */
.footer {
  background:
    radial-gradient(800px 300px at 50% 0%, rgba(47,107,255,.12), transparent 60%),
    #0b1b3a;
  color: #c8d3e6; padding: 56px 0 22px; position: relative;
}
.footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47,107,255,.4), rgba(6,182,212,.3), transparent);
}
.footer a { color: #c8d3e6; }
.footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 0.9fr 0.9fr 0.9fr 1.2fr 0.9fr; gap: 29px; }
.footer .brand { color: #fff; margin-bottom: 16px; }
.footer .brand small { color: #7e8db0; }
.footer p.desc { font-size: 14px; color: #9fb0c9; max-width: 320px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 13px; letter-spacing: .02em; }
.footer ul li { margin-bottom: 9px; font-size: 14px; }
.footer .contact-item { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; font-size: 14px; }
.footer .contact-item svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }
.footer .contact-item a.ct-link { color: inherit; text-decoration: none; transition: color .15s; }
.footer .contact-item a.ct-link:hover { color: var(--accent); text-decoration: underline; }
/* 地址导航链接：保持与普通文本一致的外观 */
.addr-nav { color: inherit; text-decoration: none; }
.addr-nav:hover { color: var(--primary); text-decoration: underline; }
/* info-row（联系页侧栏）参照底部规则的电话/邮箱触发样式 */
.info-row a.ct-link { color: var(--text); text-decoration: none; transition: color .15s; }
.info-row a.ct-link:hover { color: var(--primary); text-decoration: underline; }
.info-row .ct-phone-m { display: none; }
.footer .contact-item .ct-phone-m { display: none; }
@media (max-width: 768px) {
  .footer .contact-item .ct-phone-d { display: none; }
  .footer .contact-item .ct-phone-m { display: inline; }
  .info-row .ct-phone-d { display: none; }
  .info-row .ct-phone-m { display: inline; }
}
.footer .qr-item { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.footer .qr-img { width: 118px; height: 118px; border-radius: 6px; display: block; background: #fff; padding: 4px; }
.footer .qr-tip { font-size: 13px; color: #9fb0c9; line-height: 1.5; max-width: 140px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 35px; padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: #8ea0c0; }
.footer-bottom a { color: #8ea0c0; }
.footer-bottom a:hover { color: #fff; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
.reveal.d5 { transition-delay: .4s; }
.reveal.d6 { transition-delay: .48s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero-grid2, .split, .sub-layout { grid-template-columns: 1fr; }
  .split .visual { order: -1; }
  .hero-visual { order: 1; }
  .hero-cards { box-shadow: 0 8px 22px rgba(15,35,75,.06); }
  .hero-cards__grid { padding: 14px; gap: 8px; }
  .hero-card { padding: 12px 6px 10px; }
  .hero-card img { width: 40px; height: 40px; border-radius: 10px; }
  .hero-card__name { font-size: 11px; }
  .grid-3, .grid-4, .stats, .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-menu, .nav-actions .lang-toggle { display: none; }
  .menu-btn { display: grid; }
  .nav-inner { gap: 12px; }
  .nav-actions { margin-left: auto; }
  .sidebar { position: static; }
  /* 手机端侧边栏 → 横向标签式 */
  .sidebar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
  }
  .sidebar .s-title { display: none; }
  .sidebar a {
    padding: 7px 14px;
    font-size: 13.5px;
    border-radius: 50px;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
  }
  .sidebar a .dot { display: none; }
  .sidebar a.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(43,108,255,.25);
  }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-6, .stats, .steps, .form-grid { grid-template-columns: 1fr; }
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-areas:
      "brand brand brand"
      "prod sol about"
      "contact contact contact"
      "follow follow follow";
    gap: 14px 12px;
  }
  .footer-grid > :nth-child(1) { grid-area: brand; }
  .footer-grid > :nth-child(2) { grid-area: prod; }
  .footer-grid > :nth-child(3) { grid-area: sol; }
  .footer-grid > :nth-child(4) { grid-area: about; }
  .footer-grid > :nth-child(5) { grid-area: contact; }
  .footer-grid > :nth-child(6) { grid-area: follow; }
  .footer h4 { margin-bottom: 10px; }
  .footer ul li { margin-bottom: 7px; font-size: 13px; }
  .list-item { grid-template-columns: 1fr; gap: 8px; }
  .hero-badges { gap: 16px; }
  .container { padding: 0 18px; }
  .trust .container { padding: 26px 18px; }
  .trust-header strong { font-size: 16px; }
  .trust-count { min-width: 52px; height: 34px; padding: 0 12px; font-size: 15px; }
  .trust .logos .ind-chip { padding: 8px 14px; font-size: 13px; }
  .hero-cards__grid { grid-template-columns: repeat(2, 1fr); }
}

/* 案例页：获取具体方案按钮 */
.case-cta-wrap{margin-top:18px;display:flex;justify-content:flex-end}
.btn-case{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:999px;background:linear-gradient(135deg,var(--accent),#7c5cff);color:#fff;font-size:14px;font-weight:600;text-decoration:none;transition:transform .2s,box-shadow .2s}
.btn-case:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(64,102,255,.32)}
.btn-case svg{width:16px;height:16px}
.btn-case--corner{position:absolute;top:18px;right:18px;padding:6px 14px;font-size:12px;line-height:1.5;box-shadow:0 4px 12px rgba(64,102,255,.22)}
.btn-case--corner:hover{box-shadow:0 6px 18px rgba(64,102,255,.36)}
.btn-case--corner svg{width:14px;height:14px}

/* 产品详情：典型落地成果 */
.case-mini{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg,16px);padding:0 24px 24px;display:flex;flex-direction:column;transition:all .3s cubic-bezier(.4,0,.2,1);overflow:hidden}
.case-mini:hover{transform:translateY(-4px);box-shadow:0 20px 48px -12px rgba(15,35,75,.14);border-color:transparent}
.case-mini__top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.case-mini__cat{font-size:12px;font-weight:700;color:var(--primary);background:#eef3ff;padding:3px 10px;border-radius:999px}
.case-mini__top h3{margin:0;font-size:18px;font-weight:800;color:var(--ink)}
.case-mini__meta{font-size:13px;color:#97a3b8;margin:0 0 14px}
.case-mini__res{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.case-mini__res li{display:flex;gap:9px;align-items:flex-start;font-size:14px;line-height:1.6;color:var(--text)}
.case-mini__res .ck{flex:0 0 auto;width:18px;height:18px;border-radius:50%;background:rgba(34,197,94,.12);color:#16a34a;display:grid;place-items:center;margin-top:2px}
.case-mini__res .ck svg{width:12px;height:12px}
.case-mini__cover{margin:-22px -24px 18px}
.case-mini__cover img{width:100%;height:172px;object-fit:cover;display:block}
.case-mini__res{flex:1}.case-mini__more{margin-top:18px;display:flex;justify-content:center;align-self:stretch;width:100%;box-sizing:border-box}
.section--overview .lead{margin-top:18px}
.case-detail{max-width:960px;margin:0 auto}
.case-detail__hero{border-radius:var(--radius-lg,16px);overflow:hidden;margin-bottom:22px}
.case-detail__hero img{width:100%;max-height:420px;object-fit:cover;display:block}
.case-columns--detail{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius,12px);overflow:hidden;background:#fff}
.case-columns--detail .case-col{padding:24px 26px;border-right:1px solid var(--line)}
.case-columns--detail .case-col:last-child{border-right:none}
.case-columns--detail .case-col h4{font-size:15px;font-weight:800;color:var(--primary);margin:0 0 14px;display:flex;align-items:center;gap:8px}
.case-columns--detail .case-col h4::before{content:'';width:4px;height:16px;background:var(--primary);border-radius:2px}
.case-columns--detail .case-col p{font-size:13.5px;margin:0 0 10px;color:var(--text);line-height:1.6}
.case-columns--detail .case-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.case-columns--detail .case-col li{font-size:13.5px;color:var(--text);padding-left:18px;position:relative;line-height:1.65}
.case-columns--detail .case-col li::before{content:'';position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.case-columns--detail .case-results li::before{background:#22c55e}
@media (max-width:720px){.case-columns--detail{grid-template-columns:1fr}.case-columns--detail .case-col{border-right:none;border-bottom:1px solid var(--line)}.case-columns--detail .case-col:last-child{border-bottom:none}}

/* 信任墙：客户 logo 卡片网格（统一白底，无 dark 区分） */
.logo-wall { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 980px) { .logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 640px) { .logo-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.logo-card {
  background: #fff;
  border: 1px solid #e8edf3;
  border-radius: 14px;
  padding: 22px 18px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 124px;
  box-shadow: 0 1px 3px rgba(15,23,42,.04);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.logo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(15,23,42,.10);
  border-color: #cfe0f5;
}
.logo-card .logo-box {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.logo-card .logo-box > img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}
.logo-card figcaption {
  margin: 0;
  font-size: 12.5px;
  font-weight: 600;
  color: #64748b;
  text-align: center;
  letter-spacing: .3px;
  line-height: 1.4;
}