/* ============================================
   广西云擎科技 · YUNQING THERMAL
   Deep-Space Tech Design System
   ============================================ */

/* ---------- 1. Design Tokens · 浅色节能主题 ---------- */
:root {
  /* 浅色底色（微微偏绿，呼应节能） */
  --bg:            #F7FAF8;
  --bg-2:          #FFFFFF;
  --bg-3:          #EFF5F2;
  --surface:       #FFFFFF;
  --surface-2:     #F3F8F5;
  --border:        rgba(14, 52, 40, .10);
  --border-str:    rgba(14, 52, 40, .17);

  /* 文本 */
  --text:          #0D2119;
  --text-2:        #4A5E56;
  --text-3:        #7B8C85;

  /* 节能绿主色 */
  --cyan:          #0A7F50;
  --cyan-deep:     #076B42;
  --mint:          #0B8A57;
  --aqua:          #07809B;
  --blue:          #2E7DD1;

  /* 能量暖色（热量 / 温度） */
  --heat:          #B8420F;
  --heat-2:        #F5A524;

  /* 渐变 */
  --grad:          linear-gradient(115deg, #0A7F50 0%, #07809B 100%);
  --grad-warm:     linear-gradient(115deg, #F5A524 0%, #EF6C3F 100%);
  --grad-text:     linear-gradient(100deg, #076B42 0%, #07809B 55%, #0A7F50 100%);
  --grad-border:   linear-gradient(115deg, rgba(10,127,80,.55), rgba(7,128,155,.35), rgba(201,72,26,.42));

  /* 柔和浅投影 */
  --glow-cyan:     0 0 0 1px rgba(15,169,104,.22), 0 8px 24px -10px rgba(15,169,104,.35);
  --shadow-card:   0 1px 3px rgba(14,52,40,.05), 0 12px 30px -14px rgba(14,52,40,.13);
  --shadow-lift:   0 3px 10px rgba(14,52,40,.07), 0 26px 56px -20px rgba(14,52,40,.20);

  /* 布局 */
  --max:           1280px;
  --max-narrow:    880px;
  --gutter:        clamp(20px, 5vw, 48px);
  --nav-h:         76px;
  --radius:        18px;
  --radius-sm:     12px;
  --radius-lg:     26px;

  /* 动效 */
  --ease:          cubic-bezier(.22,.61,.36,1);
  --ease-out:      cubic-bezier(.16,1,.3,1);
  --dur:           .6s;

  /* 字体 */
  --font: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Consolas, monospace;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "tnum" on, "lnum" on;
}

img, svg, canvas { display: block; max-width: 100%; }
/* 配合 <img> 的 width/height 属性仅作宽高比预留（降低 CLS），不强行拉高 */
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; background: none; border: none; outline: none; }
button { cursor: pointer; }
ul, ol { list-style: none; }

::selection { background: rgba(15,169,104,.22); color: #0D2119; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #EEF3F0; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(15,169,104,.5), rgba(6,166,196,.42));
  border-radius: 10px; border: 3px solid #EEF3F0;
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg, rgba(15,169,104,.8), rgba(6,166,196,.65)); }

/* ---------- 3. 全局背景氛围 ---------- */
.ambient {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(920px 640px at 10% -10%, rgba(15,169,104,.14), transparent 62%),
    radial-gradient(780px 560px at 92% 4%,   rgba(6,166,196,.12), transparent 60%),
    radial-gradient(880px 700px at 78% 98%,  rgba(245,165,36,.10), transparent 62%);
}
.grid-veil {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .85;
  background-image:
    linear-gradient(rgba(14,52,40,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14,52,40,.045) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 100%);
}
.noise {
  position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: .018;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 4. 布局容器 ---------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 2; }
.wrap-narrow { max-width: var(--max-narrow); }
main { position: relative; z-index: 2; }

section { position: relative; z-index: 2; }
.sec { padding: clamp(72px, 9vw, 132px) 0; }
.sec-sm { padding: clamp(52px, 6vw, 88px) 0; }
.sec-tint { background: linear-gradient(180deg, transparent, rgba(15,169,104,.045) 18%, rgba(15,169,104,.045) 82%, transparent); }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border-str) 20%, var(--border-str) 80%, transparent); }

/* ---------- 5. 排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 20px; font-family: var(--font-mono);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px; background: var(--grad);
}
.eyebrow.center::after { content: ""; width: 26px; height: 1px; background: var(--grad); }

h1, h2, h3, h4, h5 { font-weight: 700; line-height: 1.18; letter-spacing: -.02em; }

.h-hero {
  font-size: clamp(2.5rem, 6.2vw, 5.1rem);
  letter-spacing: -.035em; line-height: 1.06; font-weight: 800;
}
.h1 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); letter-spacing: -.03em; }
.h2 { font-size: clamp(1.85rem, 3.7vw, 3rem); letter-spacing: -.028em; }
.h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); letter-spacing: -.015em; }
.h4 { font-size: 1.08rem; letter-spacing: -.01em; }

.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.text-cyan { color: var(--cyan); }
.text-mint { color: var(--mint); }
.text-heat { color: var(--heat); }
.text-dim { color: var(--text-2); }
.text-mono { font-family: var(--font-mono); }

.lead { font-size: clamp(1rem, 1.35vw, 1.16rem); color: var(--text-2); line-height: 1.8; }
.body-text { color: var(--text-2); line-height: 1.85; }
.center { text-align: center; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; } .mt-64 { margin-top: 64px; }
.mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; } .mb-56 { margin-bottom: 56px; }

.sec-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.sec-head.center { margin-left: auto; margin-right: auto; }

/* ---------- 6. 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border-bottom-color: var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px; position: relative;
  background: linear-gradient(140deg, rgba(15,169,104,.14), rgba(6,166,196,.10) 55%, rgba(245,165,36,.14));
  border: 1px solid rgba(15,169,104,.22);
  display: grid; place-items: center; flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.9), 0 4px 14px -6px rgba(15,169,104,.4);
}
.brand-mark svg { width: 22px; height: 22px; }
/* 字母字标：YunTech（替代原水滴图标） */
.brand-mark.brand-wordmark {
  width: auto; height: 32px; padding: 0 11px;
  border: 1px solid transparent; border-radius: 8px;
  background: var(--grad); color: #FFFFFF;
  font-size: 14.5px; font-weight: 800; letter-spacing: -.01em;
  white-space: nowrap;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 5px 14px -7px rgba(10,127,80,.55);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.22; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: .01em; }
.brand-sub { font-size: 10px; letter-spacing: .2em; color: var(--text-3); text-transform: uppercase; font-family: var(--font-mono); }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  position: relative; padding: 9px 16px; border-radius: 9px;
  font-size: 14.5px; font-weight: 500; color: var(--text-2);
  transition: color .28s var(--ease), background .28s var(--ease);
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px; height: 1.5px;
  background: var(--grad); border-radius: 2px;
}

.nav-cta { display: flex; align-items: center; gap: 12px; }

.burger { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--border-str); place-items: center; background: rgba(255,255,255,.7); }
.burger span { display: block; width: 17px; height: 1.8px; background: var(--text); position: relative; transition: .3s var(--ease); }
.burger span::before, .burger span::after {
  content: ""; position: absolute; left: 0; width: 17px; height: 1.8px; background: var(--text); transition: .3s var(--ease);
}
.burger span::before { top: -5.5px; } .burger span::after { top: 5.5px; }
.burger.on span { background: transparent; }
.burger.on span::before { top: 0; transform: rotate(45deg); }
.burger.on span::after { top: 0; transform: rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 99;
  background: rgba(255,255,255,.98); backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 20px var(--gutter) 32px;
  display: none; flex-direction: column; gap: 4px;
  transform: translateY(-12px); opacity: 0; transition: .35s var(--ease);
}
.drawer.open { display: flex; transform: translateY(0); opacity: 1; }
.drawer a { padding: 14px 4px; font-size: 17px; font-weight: 500; border-bottom: 1px solid var(--border); color: var(--text-2); }
.drawer a:last-of-type { border-bottom: none; }
.drawer .btn { margin-top: 16px; justify-content: center; }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px;
  font-size: 14.5px; font-weight: 600; letter-spacing: .01em;
  position: relative; overflow: hidden; white-space: nowrap;
  transition: transform .32s var(--ease), box-shadow .32s var(--ease), background .32s, border-color .32s, color .32s;
}
.btn svg { width: 16px; height: 16px; transition: transform .32s var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: scale(.975); }

.btn-primary {
  background: var(--grad); color: #FFFFFF; font-weight: 700;
  box-shadow: 0 10px 30px -10px rgba(15,169,104,.65), inset 0 1px 0 rgba(255,255,255,.4);
}
.btn-primary:hover { box-shadow: 0 16px 44px -10px rgba(15,169,104,.85), inset 0 1px 0 rgba(255,255,255,.5); transform: translateY(-2px); }
.btn-primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255,255,255,.55) 50%, transparent 80%);
  transform: translateX(-120%); transition: transform .75s var(--ease);
}
.btn-primary:hover::after { transform: translateX(120%); }

.btn-ghost { border: 1px solid var(--border-str); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: rgba(15,169,104,.55); background: rgba(15,169,104,.08); transform: translateY(-2px); }

.btn-sm { padding: 9px 18px; font-size: 13.5px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14.5px; font-weight: 600; color: var(--cyan);
  transition: gap .3s var(--ease);
}
.link-arrow svg { width: 15px; height: 15px; }
.link-arrow:hover { gap: 13px; }

/* ---------- 8. Hero ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--nav-h) + 48px) 0 72px;
  overflow: hidden;
}
#thermal-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; opacity: .95; }
.hero-veil {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(180deg, rgba(247,250,248,.72) 0%, rgba(247,250,248,.20) 32%, rgba(247,250,248,.55) 74%, var(--bg) 100%);
}
.hero-inner { position: relative; z-index: 3; width: 100%; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 8px 7px 8px; border-radius: 999px;
  background: rgba(255,255,255,.86); border: 1px solid var(--border-str);
  font-size: 13px; color: var(--text-2); margin-bottom: 28px;
  box-shadow: 0 2px 10px -4px rgba(14,52,40,.14); backdrop-filter: blur(8px);
}
.hero-badge .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--mint);
  box-shadow: 0 0 0 0 rgba(47,201,142,.65); animation: pulse 2.4s infinite;
  margin-left: 6px;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(47,201,142,.6); }
  70% { box-shadow: 0 0 0 9px rgba(47,201,142,0); }
  100% { box-shadow: 0 0 0 0 rgba(47,201,142,0); }
}
.hero-badge .pill {
  padding: 3px 11px; border-radius: 999px; background: var(--grad);
  color: #FFFFFF; font-weight: 700; font-size: 11.5px; letter-spacing: .04em;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

/* Hero 数据条 */
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; margin-top: clamp(56px, 7vw, 92px);
  background: var(--border); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.hero-stats .stat {
  background: rgba(255,255,255,.9); backdrop-filter: blur(8px);
  padding: 24px 22px; transition: background .35s var(--ease);
}
.hero-stats .stat:hover { background: rgba(15,169,104,.07); }
.stat-num { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; line-height: 1; font-family: var(--font-mono); }
.stat-num .unit { font-size: .5em; font-weight: 600; color: var(--text-2); margin-left: 3px; }
.stat-label { font-size: 13px; color: var(--text-3); margin-top: 10px; letter-spacing: .02em; }
/* 首页定性实力背书短语（替代第三方市场规模数字，REQ-16） */
.stat-word {
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .5px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 4; display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 10.5px; letter-spacing: .24em; color: var(--text-3); text-transform: uppercase;
  font-family: var(--font-mono);
}
.scroll-hint .line { width: 1.5px; height: 34px; background: linear-gradient(180deg, var(--cyan), transparent); animation: drop 2.2s ease-in-out infinite; }
@keyframes drop { 0%,100% { opacity: .25; transform: scaleY(.55); transform-origin: top; } 50% { opacity: 1; transform: scaleY(1); transform-origin: top; } }

/* ---------- 9. 卡片 ---------- */
.grid { display: grid; gap: 20px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-6 { grid-template-columns: repeat(6, 1fr); }

.card {
  position: relative; padding: 32px 28px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease), box-shadow .45s var(--ease);
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--grad-border); opacity: 0; transition: opacity .45s var(--ease);
}
.card::after {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .45s var(--ease); pointer-events: none;
  background: radial-gradient(420px 240px at var(--mx, 50%) var(--my, 0%), rgba(15,169,104,.11), transparent 70%);
}
.card:hover { transform: translateY(-6px); border-color: rgba(15,169,104,.3); background: var(--surface-2); box-shadow: var(--shadow-card); }
.card:hover::before { opacity: 1; }
.card:hover::after { opacity: 1; }

/* 能力图片卡片（核心能力：顶部配图 + 标题 + 描述） */
.card.card-media { padding: 0; display: flex; flex-direction: column; }
.card-media::after { display: none; } /* 关闭 hover 光斑：会盖在配图上显脏 */
.card-media .media {
  aspect-ratio: 5 / 3; overflow: hidden; background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.card-media .media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .65s var(--ease);
}
.card-media:hover .media img { transform: scale(1.04); }
.card-media .media-body { padding: 24px 24px 28px; }
/* 六列窄卡（技术页工具链）：卡片仅约 175px 宽，内边距需收紧，否则文字区过窄 */
.g-6 .card-media .media-body { padding: 18px 14px 20px; }

/* 实物图片卡片（市场定位） */
.card.image-card {
  padding: 0;
  display: grid;
  place-items: end stretch;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
}
.image-card img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .65s var(--ease);
  z-index: 1;
}
.image-card:hover img { transform: scale(1.04); }
.image-card::after { display: none; }
.image-card-caption {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 34px 20px 16px;
  background: linear-gradient(0deg, rgba(0,0,0,.62) 0%, rgba(0,0,0,.22) 55%, transparent 100%);
  color: #fff;
}
.image-card-caption .h4 {
  color: #fff;
  font-size: 16px;
  margin: 0;
  text-shadow: 0 1px 3px rgba(0,0,0,.35);
}

/* 合作伙伴卡片（背景图 + LOGO） */
.partner-grid { grid-auto-rows: 1fr; }
.partner-card {
  position: relative;
  padding: 0;
  height: 100%;
  min-height: 320px;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.partner-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  transition: transform .65s var(--ease);
}
.partner-card:hover .partner-bg { transform: scale(1.04); }
.partner-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(255,255,255,.94) 0%, rgba(255,255,255,.84) 38%, rgba(255,255,255,.72) 100%);
}
.partner-content {
  position: relative; z-index: 2;
  padding: 28px 26px;
  height: 100%;
  display: flex; flex-direction: column;
}
.partner-head {
  display: flex; align-items: center; gap: 14px;
  flex-shrink: 0;
}
.partner-logo {
  width: 52px; height: 52px;
  object-fit: contain;
  border-radius: 10px;
  background: #fff;
  padding: 5px;
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.partner-card .h3 { margin: 0; }
.partner-card .feature-list { margin-top: auto; padding-top: 18px; }

@media (max-width: 560px) {
  .partner-card { min-height: 280px; }
  .partner-content { padding: 22px 20px; }
  .partner-logo { width: 44px; height: 44px; }
}

/* 行业痛点卡片（PPT 三大痛点） */
.pain-card {
  padding: 28px 26px;
  display: flex; flex-direction: column;
}
.pain-list {
  display: flex; flex-direction: column;
  margin-top: 8px;
}
.pain-block {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.pain-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.pain-block:first-child { padding-top: 0; }
.pb-title {
  font-size: 13px; font-weight: 700; letter-spacing: .02em;
  color: var(--cyan);
  margin-bottom: 8px;
}
.pb-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 10px;
}
.pb-tag {
  display: inline-flex; align-items: center;
  padding: 4px 9px; border-radius: 7px;
  font-size: 11px; font-weight: 500;
  background: rgba(15,169,104,.08);
  border: 1px solid rgba(15,169,104,.16);
  color: var(--cyan-deep);
}

/* 行业痛点信息图（直接替换卡片） */
.infographic-wrap {
  margin-top: 64px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  background: var(--surface);
}
.infographic-img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 560px) {
  .infographic-wrap { margin-top: 40px; }
}

.card-num {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; letter-spacing: .16em;
  color: var(--text-3); margin-bottom: 16px;
}

/* 领域大卡 */
.domain-card {
  position: relative; padding: 40px 34px 34px; min-height: 300px;
  display: flex; flex-direction: column; justify-content: space-between;
  background: linear-gradient(165deg, rgba(15,169,104,.05), rgba(255,255,255,.012));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.domain-card::after {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .5s var(--ease);
  background: radial-gradient(560px 320px at 78% 8%, rgba(15,169,104,.16), transparent 66%);
}
.domain-card:hover { transform: translateY(-8px); border-color: rgba(15,169,104,.34); box-shadow: var(--shadow-lift); }
.domain-card:hover::after { opacity: 1; }
.domain-card .bg-glyph {
  position: absolute; right: -26px; bottom: -34px; width: 190px; height: 190px;
  opacity: .05; transition: opacity .5s var(--ease), transform .6s var(--ease);
}
.domain-card:hover .bg-glyph { opacity: .11; transform: scale(1.09) rotate(-6deg); }
.domain-meta { position: relative; z-index: 2; }
.domain-body { position: relative; z-index: 2; }
.domain-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }

/* ---------- 10. 标签 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 500; letter-spacing: .02em;
  background: rgba(15,169,104,.055); border: 1px solid var(--border);
  color: var(--text-2); transition: .3s var(--ease);
}
.domain-card:hover .tag { border-color: rgba(15,169,104,.28); color: var(--text); }
.tag-cyan { background: rgba(10,127,80,.10); border-color: rgba(10,127,80,.32); color: #0A7F50; font-weight: 600; }
.tag-warm { background: rgba(201,72,26,.10); border-color: rgba(201,72,26,.32); color: #B8420F; font-weight: 600; }

/* ---------- 11. 技术支柱 / 交替布局 ---------- */
.pillar {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 72px);
  align-items: center; padding: clamp(40px, 5vw, 64px) 0;
}
.pillar + .pillar { border-top: 1px solid var(--border); }
.pillar.rev .pillar-visual { order: -1; }
.pillar-visual {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); background: linear-gradient(150deg, rgba(15,169,104,.07), rgba(239,108,63,.05));
  display: grid; place-items: center; padding: 34px;
  min-height: 460px;
}
.pillar-visual::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(15,169,104,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(15,169,104,.04) 1px, transparent 1px);
  background-size: 34px 34px;
}
.pillar-visual > * { position: relative; z-index: 2; }
.pillar-index {
  position: absolute; top: 20px; left: 26px; z-index: 3;
  font-family: var(--font-mono); font-size: 13px; font-weight: 700; letter-spacing: .18em; color: var(--text-3);
}

.feature-list { display: flex; flex-direction: column; gap: 14px; margin-top: 26px; }
.feature-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.8px; color: var(--text-2); }
.feature-list .tick {
  flex-shrink: 0; width: 19px; height: 19px; border-radius: 50%; margin-top: 3px;
  background: rgba(15,169,104,.14); border: 1px solid rgba(15,169,104,.36);
  display: grid; place-items: center;
}
.feature-list .tick svg { width: 11px; height: 11px; stroke: var(--mint); }

/* ---------- 12. 可视化组件（纯 CSS/SVG） ---------- */
/* 温度条 */
.thermo-stack { display: flex; flex-direction: column; gap: 16px; width: 100%; max-width: 400px; }
.thermo-row { display: flex; align-items: center; gap: 14px; }
.thermo-row .lbl { width: 92px; font-size: 12.5px; color: var(--text-3); flex-shrink: 0; font-family: var(--font-mono); }
.thermo-bar { flex: 1; height: 8px; border-radius: 999px; background: rgba(14,52,40,.075); overflow: hidden; }
.thermo-fill {
  height: 100%; border-radius: 999px; width: 0;
  background: linear-gradient(90deg, #0FA968, #2FC98E 55%, #F5A524 82%, #EF6C3F);
  transition: width 1.6s var(--ease-out);
}
.thermo-row .val { width: 52px; text-align: right; font-family: var(--font-mono); font-size: 13px; font-weight: 700; }

/* 环形指标 */
.ring-wrap { display: flex; gap: 34px; flex-wrap: wrap; justify-content: center; }
.ring { position: relative; width: 118px; height: 118px; }
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 7; stroke-linecap: round; }
.ring .track { stroke: rgba(14,52,40,.075); }
.ring .prog { stroke: url(#ringGrad); transition: stroke-dashoffset 1.8s var(--ease-out); }
.ring-txt { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
.ring-txt b { font-size: 1.4rem; font-weight: 800; font-family: var(--font-mono); letter-spacing: -.02em; }
.ring-txt span { display: block; font-size: 10.5px; color: var(--text-3); margin-top: 1px; }

/* 数字孪生示意 */
.twin-diagram { width: 100%; max-width: 380px; }
.twin-node {
  display: flex; align-items: center; gap: 13px; padding: 12px 15px;
  background: rgba(15,169,104,.05); border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 11px; font-size: 13.5px; transition: .35s var(--ease);
}
.twin-node:hover { border-color: rgba(15,169,104,.4); transform: translateX(4px); }
.twin-node .idx { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; flex-shrink: 0;
  background: rgba(15,169,104,.13); font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--cyan); }
.twin-flow { width: 1px; height: 15px; background: linear-gradient(180deg, rgba(15,169,104,.6), transparent); margin: 0 0 11px 27px; }

/* AI 曲线图 */
.ai-chart { width: 100%; max-width: 400px; }
.ai-chart svg { width: 100%; height: auto; }
.ai-chart .grid-line { stroke: rgba(14,52,40,.06); stroke-width: 1; }
.ai-chart .area { fill: url(#areaGrad); }
.ai-chart .line-pred { fill: none; stroke: var(--cyan); stroke-width: 2.2; stroke-linecap: round; }
.ai-chart .line-actual { fill: none; stroke: rgba(255,255,255,.32); stroke-width: 1.6; stroke-dasharray: 4 4; }
.ai-chart .thresh { stroke: var(--heat); stroke-width: 1.2; stroke-dasharray: 5 5; opacity: .75; }

/* ---------- 13. Tab（解决方案） ---------- */
.tabs {
  display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 40px;
  padding: 6px; border-radius: 999px; background: rgba(15,169,104,.04);
  border: 1px solid var(--border); width: fit-content; max-width: 100%;
}
.tab {
  padding: 10px 20px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: var(--text-3); transition: .3s var(--ease); white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--grad); color: #FFFFFF; box-shadow: 0 6px 20px -8px rgba(15,169,104,.7); }

.tab-panel { display: none; animation: fadeUp .55s var(--ease-out); }
.tab-panel.active { display: block; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.panel-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 4vw, 56px); align-items: start; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 24px; }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 13px 0; font-size: 14.5px; vertical-align: top; }
.spec-table td:first-child { color: var(--text-3); width: 40%; padding-right: 16px; }
.spec-table td:last-child { color: var(--text); font-weight: 500; }

/* ---------- 14. 案例 ---------- */
.case-card {
  display: grid; grid-template-columns: 300px 1fr; gap: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.case-card:hover { transform: translateY(-6px); border-color: rgba(15,169,104,.3); box-shadow: var(--shadow-lift); }
.case-visual {
  position: relative; padding: 34px; display: flex; flex-direction: column; justify-content: center; gap: 6px;
  background: linear-gradient(150deg, rgba(15,169,104,.1), rgba(6,166,196,.06) 60%, rgba(239,108,63,.05));
  border-right: 1px solid var(--border);
}
.case-visual::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 26px 26px;
}
.case-visual > * { position: relative; z-index: 2; }
.case-kpi { font-family: var(--font-mono); font-size: 2.5rem; font-weight: 800; letter-spacing: -.04em; line-height: 1; }
.case-kpi .sign { color: var(--mint); }
.case-body { padding: 34px 36px; }
.case-quote {
  margin-top: 20px; padding: 16px 20px; border-left: 2px solid var(--cyan);
  background: rgba(15,169,104,.05); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14.5px; color: var(--text-2); font-style: italic;
}

/* ---------- 15. 时间轴 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47,201,142,.4) 45%, rgba(239,108,63,.3));
}
.tl-item { position: relative; padding-bottom: 38px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -31px; top: 7px; width: 15px; height: 15px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(15,169,104,.12);
}
.tl-year { font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: var(--cyan); letter-spacing: .1em; }

/* ---------- 16. 团队 ---------- */
.member { text-align: center; }
.avatar {
  width: 92px; height: 92px; border-radius: 50%; margin: 0 auto 18px;
  background: linear-gradient(140deg, rgba(15,169,104,.16), rgba(6,166,196,.1));
  border: 1px solid rgba(15,169,104,.26);
  display: grid; place-items: center; font-size: 1.5rem; font-weight: 700; color: var(--cyan);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.member:hover .avatar { transform: translateY(-4px); box-shadow: 0 14px 36px -12px rgba(15,169,104,.7); }

/* ---------- 17. 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 600; color: var(--text-2); letter-spacing: .02em; }
.field label .req { color: var(--heat); }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm);
  background: rgba(15,169,104,.05); border: 1px solid var(--border);
  font-size: 14.5px; transition: border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: rgba(15,169,104,.6); background: rgba(15,169,104,.05);
  box-shadow: 0 0 0 3px rgba(15,169,104,.1);
}
.field textarea { min-height: 128px; resize: vertical; }
.field select { cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5L6 8.5L10 4.5' stroke='%236C7B92' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px;
}
.field select option { background: #F3F8F5; color: var(--text); }
.field .err { font-size: 12px; color: var(--heat); display: none; }
.field.invalid input, .field.invalid textarea { border-color: rgba(239,108,63,.65); }
.field.invalid .err { display: block; }

.form-success {
  display: none; padding: 20px 24px; border-radius: var(--radius-sm);
  background: rgba(47,201,142,.09); border: 1px solid rgba(47,201,142,.32);
  color: var(--mint); font-size: 14.5px; align-items: center; gap: 12px;
}
.form-success.show { display: flex; }

/* ---------- 18. 联系信息 ---------- */
.contact-item { display: flex; gap: 18px; align-items: flex-start; padding: 22px 0; border-bottom: 1px solid var(--border); }
.contact-item:last-child { border-bottom: none; }
.contact-ico {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0; display: grid; place-items: center;
  background: rgba(15,169,104,.09); border: 1px solid rgba(15,169,104,.22);
}
.contact-ico svg { width: 19px; height: 19px; stroke: var(--cyan); }
.contact-item .k { font-size: 12px; color: var(--text-3); letter-spacing: .1em; text-transform: uppercase; font-family: var(--font-mono); margin-bottom: 5px; }
.contact-item .v { font-size: 15.5px; font-weight: 500; }

/* ---------- 19. CTA 区块 ---------- */
.cta-box {
  position: relative; padding: clamp(48px, 6vw, 82px) clamp(28px, 5vw, 64px);
  border-radius: var(--radius-lg); overflow: hidden; text-align: center;
  background: linear-gradient(150deg, rgba(15,169,104,.11), rgba(6,166,196,.07) 45%, rgba(239,108,63,.06));
  border: 1px solid rgba(15,169,104,.22);
}
.cta-box::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(15,169,104,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(15,169,104,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 90% at 50% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 50% 50%, #000, transparent 75%);
}
.cta-box > * { position: relative; z-index: 2; }

/* ---------- 20. 页脚 ---------- */
.footer { border-top: 1px solid var(--border); padding: clamp(52px, 6vw, 76px) 0 0; position: relative; z-index: 2; background: linear-gradient(180deg, transparent, rgba(15,169,104,.05)); }
.footer-grid { display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 44px; padding-bottom: 52px; }
.footer-col h5 { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--text); margin-bottom: 18px; font-family: var(--font-mono); }
.footer-col a, .footer-col li { display: block; font-size: 14px; color: var(--text-3); padding: 6px 0; transition: color .28s var(--ease), transform .28s var(--ease); }
.footer-col a:hover { color: var(--cyan); transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 22px 0 30px;
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-3);
}
.footer-bottom a:hover { color: var(--cyan); }
.foot-links { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.foot-top {
  font: inherit; font-size: 13px; color: var(--text-3); background: none; border: none;
  padding: 0; cursor: pointer; transition: color .28s var(--ease);
}
.foot-top:hover { color: var(--cyan); }
.social { display: flex; gap: 10px; }
.social a {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  border: 1px solid var(--border); transition: .3s var(--ease);
}
.social a:hover { border-color: rgba(15,169,104,.5); background: rgba(15,169,104,.08); transform: translateY(-2px); }
.social svg { width: 16px; height: 16px; stroke: var(--text-2); }
.social a:hover svg { stroke: var(--cyan); }

/* ---------- 20.5 内页头部 ---------- */
.page-hero {
  position: relative; padding: calc(var(--nav-h) + 76px) 0 clamp(48px, 6vw, 76px);
}
.page-hero:not(.page-hero-photo)::before {
  content: ""; position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
  width: min(1100px, 130%); height: 620px; pointer-events: none; z-index: -1;
  background: radial-gradient(ellipse 50% 50% at 50% 50%, rgba(15,169,104,.15), transparent 68%);
}

/* 有照片背景的内页头部 */
.page-hero-photo {
  overflow: hidden;
  min-height: clamp(360px, 50vw, 540px);
  display: flex; align-items: center;
}
.page-hero-photo .page-hero-bg {
  position: absolute; inset: 0; z-index: -2;
  background-size: cover; background-repeat: no-repeat; background-position: center 35%;
}
.page-hero-photo .page-hero-overlay {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(6, 32, 22, .82) 0%, rgba(6, 32, 22, .58) 42%, rgba(6, 32, 22, .22) 70%, transparent 100%),
    linear-gradient(0deg, rgba(6, 32, 22, .85) 0%, rgba(6, 32, 22, .35) 45%, transparent 100%);
}
.page-hero-photo .page-hero-content {
  position: relative; z-index: 1;
}
.page-hero-photo .eyebrow {
  color: rgba(255,255,255,.88);
}
.page-hero-photo .eyebrow::before {
  background: linear-gradient(90deg, rgba(255,255,255,.55), rgba(74,219,163,.9));
}
.page-hero-photo .h1 {
  color: #fff;
}
.page-hero-photo .lead {
  color: rgba(255,255,255,.82);
}
.page-hero-photo .grad-text {
  background: linear-gradient(100deg, #4ADBA3 0%, #62E0FF 55%, #4ADBA3 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- 20.6 流程列表 ---------- */
.flow-list { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 420px; }
.flow-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 13px 16px; border-radius: var(--radius-sm);
  background: rgba(15,169,104,.05); border: 1px solid var(--border);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.flow-item:hover { transform: translateX(5px); border-color: rgba(15,169,104,.42); background: rgba(15,169,104,.06); }
.fi-n {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  background: rgba(15,169,104,.13); border: 1px solid rgba(15,169,104,.3);
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--cyan);
}
.flow-item b { display: block; font-size: 14.5px; font-weight: 600; }
.flow-item i { display: block; font-style: normal; font-size: 12.5px; color: var(--text-3); margin-top: 2px; }

/* ---------- 20.7 V 模型图 ---------- */
.v-model { width: 100%; max-width: 620px; height: auto; }
.v-model .vm-node rect { fill: rgba(243,248,245,.9); stroke: rgba(15,169,104,.32); stroke-width: 1.2; transition: .35s var(--ease); }
.v-model .vm-node text {
  fill: var(--text); font-size: 11.5px; text-anchor: middle; font-weight: 600;
  font-family: var(--font); dominant-baseline: middle;
}
.v-model .vm-node:hover rect { fill: rgba(15,169,104,.14); stroke: rgba(15,169,104,.75); }
.v-model .vm-node.vm-base rect { fill: rgba(239,108,63,.12); stroke: rgba(239,108,63,.5); }
.v-model .vm-node.vm-base:hover rect { fill: rgba(239,108,63,.2); stroke: rgba(239,108,63,.85); }
.v-model .vm-tag { fill: var(--text-3); font-size: 10.5px; text-anchor: middle; font-family: var(--font-mono); letter-spacing: .08em; }
.v-model .vm-mid { fill: var(--mint); font-weight: 700; }

/* ---------- 20.8 云边端架构 ---------- */
.arch-stack { width: 100%; max-width: 420px; display: flex; flex-direction: column; }
.arch-layer {
  padding: 17px 20px; border-radius: var(--radius-sm);
  background: rgba(15,169,104,.05); border: 1px solid var(--border);
  transition: .35s var(--ease);
}
.arch-layer:hover { border-color: rgba(15,169,104,.42); background: rgba(15,169,104,.06); transform: scale(1.015); }
.al-tag {
  display: inline-block; font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: .16em; color: var(--cyan); margin-bottom: 7px;
  padding: 3px 9px; border-radius: 5px; background: rgba(15,169,104,.1); border: 1px solid rgba(15,169,104,.24);
}
.arch-layer b { display: block; font-size: 14.5px; font-weight: 600; }
.arch-layer i { display: block; font-style: normal; font-size: 12.5px; color: var(--text-3); margin-top: 3px; }
.arch-arrow { width: 1px; height: 16px; margin: 0 auto; background: linear-gradient(180deg, rgba(15,169,104,.7), rgba(15,169,104,.15)); position: relative; }
.arch-arrow::after {
  content: ""; position: absolute; bottom: -1px; left: 50%; transform: translateX(-50%);
  border-left: 3.5px solid transparent; border-right: 3.5px solid transparent;
  border-top: 5px solid rgba(15,169,104,.55);
}

/* ---------- 20.9 工具链 ---------- */
.toolchain { padding: 40px 32px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); }
.tool-wrap { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tool {
  padding: 8px 16px; border-radius: 999px; font-size: 13px; font-weight: 500;
  background: rgba(15,169,104,.05); border: 1px solid var(--border); color: var(--text-2);
  font-family: var(--font-mono); transition: .3s var(--ease);
}
.tool:hover { border-color: rgba(15,169,104,.5); color: var(--cyan); background: rgba(15,169,104,.08); transform: translateY(-2px); }

/* ---------- 20.9 FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 10px; }
.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
  transition: border-color .35s var(--ease), background .35s var(--ease);
}
.faq details:hover { border-color: rgba(15,169,104,.3); background: var(--surface-2); }
.faq details[open] { border-color: rgba(15,169,104,.34); background: var(--surface-2); }
.faq summary {
  padding: 19px 24px; font-size: 15.5px; font-weight: 600; cursor: pointer;
  list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  position: relative; user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq-ico { flex-shrink: 0; width: 20px; height: 20px; position: relative; }
.faq-ico::before, .faq-ico::after {
  content: ""; position: absolute; top: 50%; left: 50%; background: var(--cyan);
  transform: translate(-50%, -50%); transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.faq-ico::before { width: 13px; height: 1.6px; }
.faq-ico::after { width: 1.6px; height: 13px; }
.faq details[open] .faq-ico::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }
.faq-body {
  padding: 0 24px 22px; font-size: 14.8px; color: var(--text-2); line-height: 1.85;
  border-top: 1px solid var(--border); padding-top: 18px; margin-top: -2px;
  animation: fadeUp .4s var(--ease-out);
}

/* ---------- 20.10 复选框 ---------- */
.checkbox { display: flex !important; flex-direction: row !important; align-items: flex-start; gap: 11px; cursor: pointer; font-weight: 400 !important; color: var(--text-2) !important; font-size: 14px !important; }
.checkbox input { width: 18px !important; height: 18px; flex-shrink: 0; margin-top: 2px; accent-color: #0FA968; cursor: pointer; border-radius: 4px; }

/* ---------- 20.11 前台内容列表 / 详情（新闻 / 产品，REQ-11） ---------- */
.content-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin-bottom: 18px;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.content-item:hover { transform: translateY(-4px); border-color: rgba(15,169,104,.3); box-shadow: var(--shadow-card); }
.content-item-link { display: grid; grid-template-columns: 260px 1fr; align-items: stretch; }
.content-item-cover { height: 100%; min-height: 160px; overflow: hidden; background: var(--surface-2); }
.content-item-cover img { width: 100%; height: 100%; object-fit: cover; }
.content-item-body { padding: 24px 28px; display: flex; flex-direction: column; gap: 8px; }
.content-item-title { font-size: 1.15rem; font-weight: 700; letter-spacing: -.01em; color: var(--text); }
.content-item-meta { font-size: 12.5px; color: var(--text-3); font-family: var(--font-mono); letter-spacing: .03em; }
.content-item-summary { font-size: 14.5px; color: var(--text-2); line-height: 1.8; }
.content-item-more { margin-top: auto; font-size: 13.5px; font-weight: 600; color: var(--cyan); }

.content-article {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: clamp(26px, 4vw, 46px);
}
.content-article .h2 { margin-top: 6px; }
.content-article-meta { font-size: 13px; color: var(--text-3); font-family: var(--font-mono); letter-spacing: .03em; margin-top: 10px; }
.content-article-cover { margin-top: 24px; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); }
.content-article-cover img { width: 100%; height: auto; }
.content-article-body { margin-top: 22px; font-size: 15.5px; color: var(--text-2); line-height: 1.9; white-space: pre-wrap; word-break: break-word; }
.content-article-body h2 { margin-top: 24px; }
.content-article-foot { margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--border); }
.content-back { display: inline-block; font-size: 13.5px; font-weight: 600; color: var(--cyan); }
.content-empty {
  padding: 60px 24px; text-align: center; color: var(--text-3); font-size: 15px;
  border: 1px dashed var(--border-str); border-radius: var(--radius); background: rgba(255,255,255,.55);
}

@media (max-width: 720px) {
  .content-item-link { grid-template-columns: 1fr; }
  .content-item-cover { min-height: 0; aspect-ratio: 16 / 9; }
}

/* ---------- 21. 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .09s; } .reveal.d2 { transition-delay: .18s; }
.reveal.d3 { transition-delay: .27s; } .reveal.d4 { transition-delay: .36s; }
.reveal.d5 { transition-delay: .45s; } .reveal.d6 { transition-delay: .54s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 22. 响应式 ---------- */
/* 导航项增至 8 项：提前收起为汉堡菜单，避免中等宽度下导航拥挤 / 溢出 */
@media (max-width: 1200px) {
  .nav-links { display: none; }
  .burger { display: grid; }
  .nav-cta .btn { display: none; }
}
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .burger { display: grid; }
  .nav-cta .btn { display: none; }
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .g-6 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .case-card { grid-template-columns: 1fr; }
  .case-visual { border-right: none; border-bottom: 1px solid var(--border); }
}
@media (max-width: 860px) {
  .g-3, .g-2 { grid-template-columns: 1fr; }
  .pillar { grid-template-columns: 1fr; gap: 32px; }
  .pillar.rev .pillar-visual { order: 0; }
  .panel-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .g-4, .g-6 { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats .stat { padding: 18px 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .card { padding: 26px 22px; }
  .card-media .media { aspect-ratio: 16 / 9; }
  .card-media .media-body { padding: 20px 22px 24px; }
  .case-body { padding: 26px 22px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .brand-sub { display: none; }
  .scroll-hint { display: none; }
}