/* ==========================================================
   智彤FDE 官网 · 设计系统
   色彩取自智彤科技 LOGO：彤红 #E21821 + 炭灰 #282D34
   炭黑科技首屏 + 浅色内容区 · 中文系统字体栈（不依赖外部字体）
   ========================================================== */

:root {
  /* 炭灰（LOGO 深色 #282D34 延展） */
  --dark-950: #15171b;
  --dark-900: #1c1f24;
  --dark-800: #25292f;
  --dark-700: #33383f;
  /* 彤红（LOGO 主色 #E21821） */
  --brand-600: #c1121a;
  --brand-500: #e21821;
  --brand-400: #f0494f;
  --brand-50:  #fdefef;
  /* 暖橙点缀，与彤红组成渐变 */
  --accent-400: #ff6a3d;
  --accent-300: #ffa27a;
  --accent-2: #ffb35c;
  --green-500: #10b981;
  --amber-500: #f59e0b;
  --red-500: #9aa0a8; /* 对比表中的“×”用中性灰，避免与品牌红混淆 */

  --ink: #1d2026;
  --ink-2: #3c424b;
  --muted: #6a707a;
  --line: #e7e7ea;
  --bg: #ffffff;
  --bg-soft: #f7f7f8;

  --grad: linear-gradient(135deg, var(--brand-500) 0%, var(--accent-400) 100%);
  --grad-text: linear-gradient(90deg, #ff5a5f 0%, #ff8a5c 55%, #ffc9a8 100%);

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .04);
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, .18);
  --shadow-lg: 0 30px 60px -20px rgba(20, 22, 26, .35);

  --container: 1200px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC",
          "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
/* 顶部固定导航高 68px；锚点统一保留导航及额外阅读间距。 */
.platform-strip, section[id], h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] { scroll-margin-top: 90px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-500); text-decoration: none; }
a:hover { color: var(--brand-600); }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.3; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--accent-400); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding-inline: 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px -8px rgba(226,24,33, .6); }
.btn-primary:hover { color: #fff; box-shadow: 0 12px 30px -8px rgba(226,24,33, .75); }
.btn-ghost { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.22); }
.btn-ghost:hover { color: #fff; background: rgba(255,255,255,.12); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-outline:hover { color: var(--brand-500); border-color: var(--brand-400); }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(18, 20, 24, .82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.logo { display: flex; align-items: center; gap: 12px; color: #fff; }
.logo:hover { color: #fff; }
.logo-img { height: 34px; width: auto; }
.logo-geo {
  display: inline-block; line-height: 1.2;
  padding: 3px 9px 3px 12px; border-left: 1px solid rgba(255,255,255,.22);
  font-family: var(--mono); font-weight: 800; font-size: 15px; letter-spacing: .08em; color: #fff;
}
.logo-geo::first-letter { color: var(--brand-400); }
.site-footer .logo-img { height: 38px; }
.main-nav ul { display: flex; list-style: none; gap: 4px; }
.main-nav a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: rgba(255,255,255,.78); font-size: 15px;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: #fff; background: rgba(255,255,255,.07); }
/* 页头联系区：电话与诊断按钮同参考设计；号码仍由 CMS 配置读取。 */
.nav-actions { display: flex; align-items: center; gap: 28px; flex: none; }
.nav-phone {
  display: inline-flex; align-items: center; gap: 9px; flex: none;
  color: #b9bdc4; font-size: 14px; font-family: var(--font); font-weight: 600;
  line-height: 1; white-space: nowrap;
}
.nav-phone:hover { color: #fff; }
.nav-phone-icon { width: 14px; height: 14px; flex: none; }
.nav-actions .nav-diagnose {
  width: 138px; height: 38px; padding: 0 20px; gap: 12px;
  border-radius: 8px; background: #ff1d25; color: #fff; box-shadow: none;
  font-size: 14px; font-weight: 700; line-height: 1;
}
.nav-actions .nav-diagnose:hover { background: #e91820; color: #fff; box-shadow: none; transform: none; }
.nav-diagnose-icon { width: 16px; height: 16px; flex: none; }
/* 为加宽后的联系区保留导航空间，原手机隐藏/菜单规则保持不变。 */
@media (min-width: 1101px) {
  .nav-wrap { gap: 16px; }
  .main-nav > ul > li > a { padding-inline: 12px; }
}
@media (min-width: 1101px) and (max-width: 1240px) {
  .nav-wrap { gap: 12px; }
  .nav-actions { gap: 20px; }
  .main-nav > ul > li > a { padding-inline: 7px; font-size: 14px; }
}
.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14); color: #fff; cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 18px; height: 2px; background: currentColor; margin: 0 auto; position: relative; transition: .2s;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
.nav-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(226,24,33,.35), transparent 60%),
    radial-gradient(700px 500px at -10% 110%, rgba(255,122,61,.18), transparent 60%),
    linear-gradient(180deg, var(--dark-950) 0%, var(--dark-900) 100%);
  padding: 72px 0 0;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 8px; border-radius: 999px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  font-size: 13px; color: rgba(255,255,255,.85);
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 4px rgba(16,185,129,.2); }
.hero h1 { font-size: clamp(34px, 5vw, 56px); margin: 22px 0 18px; font-weight: 800; letter-spacing: -.02em; }
.grad-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-lead { font-size: 18px; color: rgba(255,255,255,.72); max-width: 580px; }
.hero-lead strong { color: #fff; font-weight: 600; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 34px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 28px; list-style: none; }
.hero-proof li { min-width: 110px; }
.hero-proof b { display: block; font-size: 28px; font-weight: 800; font-family: var(--mono); letter-spacing: -.02em; }
.hero-proof span { font-size: 13px; color: rgba(255,255,255,.55); }

/* AI 对话演示卡 */
.ai-demo {
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: 18px; backdrop-filter: blur(10px);
}
.ai-tabs { display: flex; gap: 6px; padding: 4px; background: rgba(0,0,0,.25); border-radius: 12px; margin-bottom: 16px; }
.ai-tab {
  flex: 1; border: 0; background: transparent; color: rgba(255,255,255,.6);
  font: inherit; font-size: 13px; padding: 8px 4px; border-radius: 9px; cursor: pointer; transition: background .2s, color .2s;
  white-space: nowrap; min-width: 0;
}
.ai-tab[aria-selected="true"] { background: rgba(255,255,255,.12); color: #fff; }
.chat { display: flex; flex-direction: column; gap: 12px; min-height: 290px; }
.bubble { padding: 12px 14px; border-radius: 14px; font-size: 14px; line-height: 1.65; }
.bubble.user { align-self: flex-end; max-width: 85%; background: var(--brand-500); border-bottom-right-radius: 4px; }
.bubble.ai { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.08); border-bottom-left-radius: 4px; color: rgba(255,255,255,.85); }
.bubble.ai ol { padding-left: 20px; margin-top: 6px; }
.bubble.ai li { margin: 4px 0; }
.bubble.ai mark {
  background: linear-gradient(90deg, rgba(226,24,33,.35), rgba(255,122,61,.3));
  color: #fff; padding: 1px 6px; border-radius: 5px; font-weight: 600;
}
.bubble .src { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.bubble .src span { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: rgba(255,122,61,.12); color: var(--accent-300); border: 1px solid rgba(255,122,61,.25); }
.ai-meta { display: flex; justify-content: space-between; margin-top: 14px; font-size: 12px; color: rgba(255,255,255,.45); }
.ai-meta b { color: var(--green-500); }

/* AI 推荐预览：仅作用于首页演示卡。 */
.hero .ai-demo.ai-recommendation {
  width: 100%; min-width: 0; margin: 0; padding: 22px; border-radius: 22px;
  border: 1px solid rgba(255, 130, 76, .6); color: #f5f5f6;
  background: radial-gradient(ellipse at 100% 0, rgba(136, 60, 43, .19), transparent 45%), linear-gradient(145deg, rgba(39, 40, 43, .92), rgba(24, 29, 32, .93));
  box-shadow: 0 16px 48px rgba(0, 0, 0, .2), inset 0 0 28px rgba(255, 126, 71, .025);
}
.ai-recommendation .ai-preview-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 18px; }
.ai-recommendation .ai-preview-header h2 { display: flex; align-items: center; gap: 10px; margin: 0; color: #fff; font-size: 20px; font-weight: 700; line-height: 1.4; letter-spacing: 0; }
.ai-recommendation .ai-preview-icon { display: inline-block; flex: none; object-fit: contain; }
.ai-recommendation .icon-orange { filter: brightness(0) saturate(100%) invert(57%) sepia(60%) saturate(1444%) hue-rotate(333deg) brightness(105%) contrast(101%); }
.ai-recommendation .icon-muted { filter: brightness(0) saturate(100%) invert(70%); }
.ai-recommendation .ai-preview-status { display: inline-flex; align-items: center; gap: 8px; flex: none; color: #b6b7bb; font-size: 12px; white-space: nowrap; }
.ai-recommendation .ai-preview-status img { display: block; filter: brightness(0) saturate(100%) invert(70%) sepia(79%) saturate(2110%) hue-rotate(111deg) brightness(97%) contrast(103%); box-shadow: 0 0 10px rgba(0, 211, 133, .3); border-radius: 50%; }
.ai-recommendation .ai-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0 0 16px; padding: 0; border: 1px solid rgba(255, 255, 255, .075); background: rgba(0, 0, 0, .12); border-radius: 10px; }
.ai-recommendation .ai-tabs .ai-tab { position: relative; display: flex; justify-content: center; align-items: center; gap: 7px; min-width: 0; min-height: 46px; padding: 9px 3px; border-radius: 9px; color: #b9bdc2; font-size: 12px; font-weight: 500; line-height: 1.3; }
.ai-recommendation .ai-tab img { display: block; flex: none; width: 21px; height: 21px; object-fit: contain; filter: grayscale(1) brightness(0) invert(1); opacity: .75; }
.ai-recommendation .ai-tabs .ai-tab[aria-selected="true"] { color: #fff; background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 126, 71, .035)); }
.ai-recommendation .ai-tab[aria-selected="true"] img { opacity: 1; }
.ai-recommendation .ai-tab[aria-selected="true"]::after { position: absolute; content: ""; left: 5px; right: 5px; bottom: 0; height: 3px; border-radius: 3px 3px 0 0; background: #ff7547; box-shadow: 0 -3px 12px rgba(255, 115, 67, .18); }
.ai-recommendation .ai-tabs .ai-tab:hover { color: #fff; background-color: rgba(255, 255, 255, .04); }
.ai-recommendation .ai-tab:focus-visible, .ai-recommendation .chat:focus-visible { outline: 2px solid #ff9b6e; outline-offset: 4px; }
.ai-recommendation .chat { display: block; min-height: 0; border-radius: 10px; }
.ai-recommendation .ai-question { display: grid; grid-template-columns: 32px minmax(0, 1fr); align-items: start; gap: 14px; padding: 16px; margin-bottom: 19px; border: 1px solid rgba(255, 255, 255, .09); border-radius: 13px; background: rgba(255, 255, 255, .045); }
.ai-recommendation .ai-question-badge { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(145deg, #ff4527, #ff9258); color: white; font-size: 19px; font-weight: 600; line-height: 1; box-shadow: 0 0 20px rgba(255, 90, 47, .13); }
.ai-recommendation .ai-question-label { display: block; margin-bottom: 5px; color: #a7acb3; font-size: 13px; line-height: 1.4; }
.ai-recommendation #demo-q { margin: 0; color: #f7f7f8; font-size: 15px; font-weight: 600; line-height: 1.6; overflow-wrap: anywhere; }
.ai-recommendation .ai-answer-heading { display: flex; align-items: center; gap: 10px; }
.ai-recommendation .ai-answer-heading h3 { margin: 0; color: #fff; font-size: 16px; font-weight: 600; line-height: 1.5; }
.ai-recommendation .ai-answer-intro { margin: 4px 0 11px 31px; color: #bfc1c5; font-size: 13px; line-height: 1.6; }
.ai-recommendation .ai-ranking { display: grid; gap: 10px; list-style: none; padding: 0; margin: 0; }
.ai-recommendation .ai-ranking > li { display: flex; align-items: baseline; gap: 17px; min-width: 0; padding: 0 21px; color: #e0e2e4; font-size: 15px; line-height: 1.5; }
.ai-recommendation .ai-ranking .ai-ranking-number { flex: none; width: 24px; color: #acb0b6; font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.ai-recommendation .ai-ranking > .ai-ranking-featured { position: relative; align-items: flex-start; gap: 16px; padding: 13px 15px 13px 22px; margin-bottom: 2px; border: 1px solid rgba(255, 134, 75, .25); border-radius: 10px; background: linear-gradient(110deg, rgba(178, 77, 38, .19), rgba(146, 77, 47, .1)); }
.ai-recommendation .ai-ranking-featured::before { position: absolute; content: ""; left: 0; top: 0; bottom: 0; width: 6px; border-radius: 9px 0 0 9px; background: linear-gradient(180deg, #ff844d, #ff713d); }
.ai-recommendation .ai-ranking-featured .ai-ranking-number { padding-top: 3px; color: #ff8754; font-size: 21px; }
.ai-recommendation .ai-ranking-main { min-width: 0; flex: 1; }
.ai-recommendation .ai-ranking-topline { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 7px 10px; }
.ai-recommendation .ai-ranking-topline mark { padding: 0; background: none; color: #fff; font-size: 21px; font-weight: 700; line-height: 1.5; }
.ai-recommendation .ai-ranking-badge { display: inline-flex; align-items: center; gap: 6px; flex: none; padding: 3px 9px; border: 1px solid rgba(255, 148, 83, .8); border-radius: 999px; color: #ff9b66; font-size: 11px; font-weight: 600; line-height: 1.5; white-space: nowrap; }
.ai-recommendation .ai-ranking-badge img { flex: none; }
.ai-recommendation .ai-ranking-main p { margin: 5px 0 0; color: #c8c2c0; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.ai-recommendation .ai-preview-sources { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 16px; padding-top: 15px; margin-top: 16px; border-top: 1px solid rgba(255, 255, 255, .13); }
.ai-recommendation .ai-sources-label { display: inline-flex; align-items: center; gap: 8px; flex: none; color: #aeb2b9; font-size: 12px; line-height: 1.5; }
.ai-recommendation .src { display: flex; flex-wrap: wrap; gap: 7px; min-width: 0; }
.ai-recommendation .src span { padding: 3px 11px; border: 1px solid rgba(255, 149, 83, .57); border-radius: 999px; color: #e5b394; background: rgba(134, 74, 41, .05); font-size: 11px; line-height: 1.5; white-space: nowrap; }
.ai-recommendation .ai-preview-footer { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin: 15px 0 0; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, .08); color: #949ba4; font-size: 10px; line-height: 1.5; }
.ai-recommendation .ai-preview-footer > span, .ai-recommendation .ai-preview-footer strong { display: inline-flex; align-items: center; gap: 6px; }
.ai-recommendation .ai-preview-footer strong { color: #ff8d58; font-size: 11px; font-weight: 600; }
@media (min-width: 641px) and (max-width: 960px) {
  .hero .ai-demo.ai-recommendation { max-width: 620px; justify-self: center; }
}
@media (max-width: 480px) {
  .hero .ai-demo.ai-recommendation { padding: 18px; border-radius: 18px; }
  .ai-recommendation .ai-preview-header h2 { font-size: 18px; gap: 8px; }
  .ai-recommendation .ai-preview-status { font-size: 11px; gap: 6px; }
  .ai-recommendation .ai-tabs .ai-tab { flex-direction: column; gap: 5px; min-height: 59px; padding: 8px 3px; font-size: 11px; }
  .ai-recommendation .ai-tab img { width: 20px; height: 20px; }
  .ai-recommendation .ai-question { padding: 13px; gap: 10px; grid-template-columns: 29px minmax(0, 1fr); }
  .ai-recommendation .ai-question-badge { width: 29px; height: 29px; font-size: 17px; }
  .ai-recommendation #demo-q { font-size: 14px; }
  .ai-recommendation .ai-ranking > li { gap: 10px; padding-inline: 12px; font-size: 14px; }
  .ai-recommendation .ai-ranking > .ai-ranking-featured { gap: 9px; padding: 12px 11px 12px 14px; }
  .ai-recommendation .ai-ranking-topline mark { font-size: 19px; }
  .ai-recommendation .ai-ranking-featured .ai-ranking-number { font-size: 19px; }
  .ai-recommendation .ai-ranking-badge { padding: 3px 6px; font-size: 10px; gap: 4px; }
  .ai-recommendation .ai-preview-sources { gap: 10px; }
  .ai-recommendation .src { gap: 6px; }
  .ai-recommendation .src span { padding-inline: 9px; }
  .ai-recommendation .ai-preview-footer { align-items: flex-start; }
}
@media (max-width: 360px) {
  .hero .ai-demo.ai-recommendation { padding: 14px; }
  .ai-recommendation .ai-preview-header { gap: 8px; }
  .ai-recommendation .ai-preview-header h2 { font-size: 17px; }
  .ai-recommendation .ai-ranking-topline { gap: 5px; }
  .ai-recommendation .ai-ranking-badge { font-size: 9px; }
  .ai-recommendation .ai-ranking-badge img { width: 12px; height: 12px; }
}

.platform-strip { position: relative; margin-top: 64px; border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0 64px; }
.platform-strip p { text-align: center; font-size: 13px; color: rgba(255,255,255,.45); margin-bottom: 14px; }
.platform-list { display: grid; grid-template-columns: repeat(11, minmax(0, 1fr)); gap: 10px; list-style: none; margin: 0; padding: 0; }
.platform-list li { display: flex; flex-direction: column; align-items: center; gap: 10px; min-width: 0; padding: 14px 4px 12px; border-radius: 14px; color: rgba(255,255,255,.9); background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.1); }
.platform-icon { display: grid; place-items: center; width: 54px; height: 54px; flex: none; border-radius: 14px; background: #fff; }
.platform-icon-dark { background: #15171c; border: 1px solid rgba(255,255,255,.16); }
.platform-icon img { display: block; width: 36px; height: 36px; object-fit: contain; }
.platform-name { display: flex; align-items: center; justify-content: center; min-height: 36px; width: 100%; text-align: center; font-size: 12px; line-height: 1.5; font-weight: 600; overflow-wrap: normal; }
@media (min-width: 641px) and (max-width: 1000px) {
  .platform-list { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .platform-list li { grid-column: span 2; }
  .platform-list li:nth-child(7) { grid-column: 2 / span 2; }
}
@media (max-width: 640px) {
  .platform-strip { margin-top: 40px; padding-bottom: 40px; }
  .platform-strip p { padding-inline: 12px; font-size: 12px; }
  .platform-list { grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 8px; }
  .platform-list li { grid-column: span 2; }
  .platform-list li:nth-child(9) { grid-column: 2 / span 2; }
  .platform-list li { gap: 7px; padding: 10px 2px 8px; border-radius: 12px; }
  .platform-icon { width: 42px; height: 42px; border-radius: 11px; }
  .platform-icon img { width: 30px; height: 30px; }
  .platform-name { font-size: 11px; min-height: 33px; }
}


/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: var(--dark-900); color: #fff; }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em;
  color: var(--brand-500); margin-bottom: 12px; font-family: var(--mono);
}
.section-dark .kicker { color: var(--accent-300); }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); }
.section-head p { color: var(--muted); font-size: 17px; }
.section-dark .section-head p { color: rgba(255,255,255,.62); }

/* 关键事实摘要（TL;DR） */
.facts {
  margin-top: -1px; padding: 0; background: var(--bg-soft);
}
.facts-card {
  position: relative; top: -36px;
  display: grid; grid-template-columns: 240px 1fr; gap: 0;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
}
.facts-label {
  padding: 28px; background: linear-gradient(160deg, var(--brand-50), #fff);
  border-right: 1px solid var(--line);
}
.facts-label h2 { font-size: 20px; margin-bottom: 8px; }
.facts-label p { font-size: 13px; color: var(--muted); margin: 0; }
.facts-label time { font-family: var(--mono); }
.facts-body { padding: 26px 30px; }
.facts-body > p { font-size: 16.5px; color: var(--ink-2); }
.facts-body > p strong { color: var(--ink); }
.facts-dl { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0 0; }
.facts-dl div { padding: 12px 14px; background: var(--bg-soft); border-radius: 10px; }
.facts-dl dt { font-size: 12px; color: var(--muted); }
.facts-dl dd { margin: 2px 0 0; font-weight: 600; font-size: 14.5px; }

/* 卡片网格 */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #d6d7dc; }
.card h3 { font-size: 19px; }
.card p { color: var(--muted); font-size: 15px; margin: 0; }
.icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--brand-50); color: var(--brand-500); margin-bottom: 18px;
}
.icon svg { width: 24px; height: 24px; }

.pain .num { font-family: var(--mono); font-size: 13px; color: var(--brand-500); font-weight: 700; }
.pain h3 { margin-top: 8px; }
.pain .stat {
  margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line);
  font-size: 13px; color: var(--ink-2);
}
.pain .stat b { color: var(--brand-500); }

/* 什么是 FDE */
.define { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: start; }
.define-text blockquote {
  margin: 0 0 24px; padding: 22px 24px; border-left: 4px solid var(--brand-500);
  background: var(--brand-50); border-radius: 0 12px 12px 0; font-size: 17px; color: var(--ink);
}
.define-text blockquote strong { color: var(--brand-600); }
.define-text p { color: var(--ink-2); }
.pillars { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 22px; list-style: none; }
.pillars li { padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; font-size: 14px; color: var(--muted); }
.pillars li b { display: block; color: var(--ink); font-size: 15px; }

.table-wrap { min-width: 0; max-width: 100%; overflow-x: auto; overscroll-behavior-x: contain; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.table-wrap table { min-width: 560px; font-size: 14.5px; }
.table-wrap caption { text-align: left; padding: 16px 20px; font-weight: 700; border-bottom: 1px solid var(--line); }
.table-wrap th, .table-wrap td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.table-wrap tr:last-child td { border-bottom: 0; }
.table-wrap thead th { background: var(--bg-soft); font-size: 13px; color: var(--muted); font-weight: 600; }
.table-wrap tbody th { font-weight: 600; white-space: nowrap; color: var(--ink); }
.table-wrap td.hl { color: var(--brand-600); font-weight: 600; background: rgba(226,24,33,.035); }
.table-wrap .no { color: var(--muted); }
.table-wrap .yes::before { content: "✓ "; color: var(--green-500); font-weight: 700; }
.table-wrap .x::before { content: "× "; color: var(--red-500); font-weight: 700; }

/* FACT 方法论 */
.fact-wrap { display: grid; grid-template-columns: 420px 1fr; gap: 56px; align-items: center; }
.flywheel { width: 100%; max-width: 420px; margin: 0 auto; }
.fact-steps { list-style: none; display: grid; gap: 16px; counter-reset: s; }
.fact-step {
  display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 22px;
  border-radius: var(--radius); background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.09);
  transition: background .2s, border-color .2s;
}
.fact-step:hover { background: rgba(255,255,255,.07); border-color: rgba(255,122,61,.35); }
.fact-letter {
  width: 58px; height: 58px; border-radius: 14px; display: grid; place-items: center;
  font-size: 28px; font-weight: 800; font-family: var(--mono); color: #fff; background: var(--grad);
}
.fact-step h3 { font-size: 18px; margin-bottom: 4px; }
.fact-step h3 small { font-size: 13px; font-weight: 500; color: var(--accent-300); margin-left: 8px; font-family: var(--mono); }
.fact-step p { color: rgba(255,255,255,.65); font-size: 14.5px; margin: 0; }
.fact-step .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.fact-step .tags span { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: rgba(255,255,255,.07); color: rgba(255,255,255,.7); }

/* 服务体系：三层合作链路 */
.chain { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; position: relative; }
.layer {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.layer:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #d6d7dc; }
/* 层与层之间的箭头 */
.layer + .layer::before {
  content: "→"; position: absolute; left: -30px; top: 50%; transform: translateY(-50%);
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  background: var(--grad); color: #fff; font-size: 13px; font-weight: 700;
}
.layer-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.layer-top .icon { margin: 0; }
.layer-tag {
  font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: .06em;
  color: var(--brand-500); background: var(--brand-50); padding: 4px 10px; border-radius: 999px;
}
.layer h3 { font-size: 22px; margin-bottom: 6px; }
.layer-lead { color: var(--ink-2); font-size: 15px; }
.layer-meta { margin: 4px 0 16px; display: grid; gap: 8px; padding: 14px 16px; background: var(--bg-soft); border-radius: 12px; }
.layer-meta div { display: grid; grid-template-columns: 52px 1fr; gap: 8px; font-size: 13.5px; }
.layer-meta dt { color: var(--muted); }
.layer-meta dd { margin: 0; color: var(--ink); font-weight: 500; }
.layer ul { list-style: none; display: grid; gap: 8px; margin-bottom: 22px; }
.layer li { font-size: 14px; color: var(--ink-2); padding-left: 22px; position: relative; }
.layer li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 12px; height: 7px;
  border-left: 2px solid var(--brand-500); border-bottom: 2px solid var(--brand-500); transform: rotate(-45deg);
}
.layer .more { margin-top: auto; font-size: 14px; font-weight: 600; }
.layer .more::after { content: " →"; }
.layer .badge {
  position: absolute; top: -12px; right: 24px; font-size: 12px; padding: 3px 12px; border-radius: 999px;
  background: var(--grad); color: #fff; font-weight: 600;
}
.layer.featured { border: 2px solid var(--brand-500); box-shadow: 0 0 0 5px rgba(226,24,33,.06); }
.layer.featured .layer-meta { background: var(--brand-50); }

.chain-bar {
  margin-top: 32px; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px 22px;
  padding: 18px 24px; border-radius: 999px; color: #fff;
  background: linear-gradient(90deg, var(--dark-900), var(--dark-700));
}
.chain-bar b { color: var(--accent-300); font-size: 15px; }
.chain-bar span { font-size: 15px; }
.chain-bar i { font-style: normal; color: var(--brand-400); margin: 0 6px; }
.chain-bar .chain-note { color: rgba(255,255,255,.55); font-size: 13.5px; }

/* 指标体系 */
.metrics { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.metric { padding: 24px 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.metric .m-en { font-family: var(--mono); font-size: 11.5px; color: var(--muted); letter-spacing: .08em; }
.metric h3 { font-size: 18px; margin: 4px 0 10px; }
.metric .formula {
  font-family: var(--mono); font-size: 12px; background: var(--bg-soft); padding: 8px 10px; border-radius: 8px;
  color: var(--ink-2); margin-bottom: 10px; line-height: 1.5;
}
.metric p { font-size: 13.5px; color: var(--muted); margin: 0; }
.bar { height: 6px; border-radius: 99px; background: var(--line); margin-top: 14px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--grad); border-radius: inherit; }
.note { font-size: 13px; color: var(--muted); margin-top: 18px; }

/* 自测工具 */
.quiz { display: grid; grid-template-columns: 1.3fr .7fr; gap: 28px; align-items: start; }
.quiz-list { list-style: none; display: grid; gap: 10px; }
.quiz-item label {
  display: flex; gap: 14px; align-items: flex-start; padding: 16px 18px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); border-radius: 12px; transition: .15s;
}
.quiz-item label:hover { border-color: var(--brand-400); }
.quiz-item input { position: absolute; opacity: 0; pointer-events: none; }
.quiz-item .chk {
  flex: none; width: 22px; height: 22px; border-radius: 7px; border: 2px solid #c9cbd1; margin-top: 2px;
  display: grid; place-items: center; transition: .15s;
}
.quiz-item input:checked + .chk { background: var(--brand-500); border-color: var(--brand-500); }
.quiz-item input:checked + .chk::after { content: ""; width: 10px; height: 6px; border-left: 2px solid #fff; border-bottom: 2px solid #fff; transform: rotate(-45deg) translate(1px, -1px); }
.quiz-item input:focus-visible + .chk { outline: 2px solid var(--accent-400); outline-offset: 2px; }
.quiz-item input:checked ~ .q-text b { color: var(--brand-600); }
.q-text b { display: block; font-size: 15px; font-weight: 600; }
.q-text span { font-size: 13px; color: var(--muted); }
.score-card {
  position: sticky; top: 92px; padding: 28px; border-radius: var(--radius-lg); color: #fff;
  background: radial-gradient(400px 200px at 100% 0%, rgba(255,122,61,.25), transparent), var(--dark-900);
  box-shadow: var(--shadow-lg);
}
.gauge { position: relative; width: 180px; margin: 6px auto 12px; }
.gauge svg { width: 100%; }
.gauge-num { position: absolute; inset: 0; display: grid; place-items: center; padding-top: 34px; text-align: center; }
.gauge-num b { font-size: 44px; font-family: var(--mono); line-height: 1; }
.gauge-num span { display: block; font-size: 12px; color: rgba(255,255,255,.5); margin-top: 4px; }
.score-level { text-align: center; font-weight: 700; font-size: 18px; margin-bottom: 8px; }
.score-tip { font-size: 14px; color: rgba(255,255,255,.7); text-align: center; min-height: 66px; }

/* 流程 */
.process { list-style: none; display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; position: relative; }
.process::before {
  content: ""; position: absolute; top: 23px; left: 7%; right: 7%; height: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-400)); opacity: .35;
}
.process li { position: relative; text-align: center; }
.process .step-n {
  width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 14px; display: grid; place-items: center;
  background: #fff; border: 2px solid var(--brand-500); color: var(--brand-500); font-weight: 800; font-family: var(--mono);
  position: relative; z-index: 1;
}
.process h3 { font-size: 16px; margin-bottom: 4px; }
.process .time { font-size: 12px; color: var(--brand-500); font-family: var(--mono); display: block; margin-bottom: 8px; }
.process p { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.6; }

/* 案例 */
.case { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.case-top { padding: 24px 26px 20px; background: linear-gradient(135deg, var(--dark-900), var(--dark-700)); color: #fff; }
.case-top .ind { font-size: 12px; color: var(--accent-300); font-family: var(--mono); letter-spacing: .06em; }
.case-top h3 { font-size: 18px; margin: 6px 0 0; }
.case-body { padding: 22px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.case-body dl { margin: 0 0 18px; display: grid; gap: 10px; }
.case-body dt { font-size: 12px; color: var(--muted); font-weight: 600; }
.case-body dd { margin: 0; font-size: 14px; color: var(--ink-2); }
.case-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: auto; }
.case-kpis div { background: var(--bg-soft); border-radius: 10px; padding: 12px 8px; text-align: center; }
.case-kpis b { display: block; font-size: 20px; color: var(--brand-600); font-family: var(--mono); }
.case-kpis span { font-size: 11.5px; color: var(--muted); }
.demo-flag { font-size: 11px; color: var(--amber-500); border: 1px solid currentColor; border-radius: 4px; padding: 0 5px; margin-left: 6px; vertical-align: middle; }

/* 合作模式对比 */
.mode-table { min-width: 720px; }
.mode-table thead th { font-size: 16px; color: var(--ink); font-weight: 700; vertical-align: bottom; }
.mode-table thead th.hl { color: var(--brand-600); }
.mt-tag { display: block; font-family: var(--mono); font-size: 11.5px; font-weight: 600; color: var(--muted); letter-spacing: .05em; margin-bottom: 2px; }
.mode-table thead th.hl .mt-tag { color: var(--brand-500); }
.mode-cta {
  margin-top: 24px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 24px;
  padding: 22px 26px; border-radius: var(--radius); background: var(--brand-50); border: 1px solid rgba(226,24,33,.15);
}
.mode-cta b { display: block; font-size: 17px; }
.mode-cta span { font-size: 14.5px; color: var(--ink-2); }

/* FAQ */
.faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.faq-list { display: grid; gap: 10px; }
.faq-list details { background: #fff; border: 1px solid var(--line); border-radius: 12px; transition: border-color .2s; }
.faq-list details[open] { border-color: rgba(226,24,33,.4); box-shadow: var(--shadow-sm); }
.faq-list summary {
  list-style: none; cursor: pointer; padding: 18px 52px 18px 22px; position: relative; font-weight: 600; font-size: 16px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  width: 24px; height: 24px; border-radius: 50%; background: var(--bg-soft); display: grid; place-items: center;
  color: var(--brand-500); font-weight: 400; font-size: 18px; line-height: 1; transition: transform .2s;
}
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list .answer { padding: 0 22px 20px; color: var(--ink-2); font-size: 15px; }
.faq-list .answer p:last-child { margin: 0; }

/* CTA 表单 */
.cta {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(600px 300px at 90% 10%, rgba(255,122,61,.22), transparent 60%),
    radial-gradient(600px 300px at 0% 100%, rgba(255,170,90,.22), transparent 60%),
    var(--dark-900);
}
.cta-grid { display: grid; grid-template-columns: 1fr 460px; gap: 56px; align-items: center; }
.cta h2 { font-size: clamp(28px, 3.6vw, 40px); }
.cta-list { list-style: none; display: grid; gap: 12px; margin-top: 24px; }
.cta-list li { display: flex; gap: 12px; color: rgba(255,255,255,.8); }
.cta-list li::before { content: "✓"; flex: none; width: 22px; height: 22px; border-radius: 50%; background: rgba(16,185,129,.2); color: var(--green-500); display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.form { background: #fff; color: var(--ink); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-lg); }
.form h3 { font-size: 20px; }
.form .sub { font-size: 13.5px; color: var(--muted); margin-bottom: 18px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 10px;
  font: inherit; font-size: 15px; background: var(--bg-soft); color: var(--ink); transition: .15s;
}
.field textarea { height: 80px; padding: 10px 14px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--brand-500); background: #fff; box-shadow: 0 0 0 3px rgba(226,24,33,.12); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form .privacy { font-size: 12px; color: var(--muted); margin: 12px 0 0; text-align: center; }
.form-ok { display: none; text-align: center; padding: 30px 0; }
.form.sent .form-ok { display: block; }
.form.sent form { display: none; }

/* Footer */
.site-footer { background: var(--dark-950); color: rgba(255,255,255,.6); font-size: 14px; padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 36px; }
.site-footer h2 { font-size: 14px; color: #fff; margin-bottom: 14px; font-weight: 600; }
.site-footer ul { list-style: none; display: grid; gap: 8px; }
.site-footer a { color: rgba(255,255,255,.6); }
.site-footer a:hover { color: #fff; }
.site-footer address { font-style: normal; line-height: 1.9; margin-top: 16px; }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  margin-top: 48px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.08); font-size: 13px;
}
.footer-bottom time { font-family: var(--mono); }

/* 回到顶部 / 浮动咨询 */
.float-cta {
  position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); z-index: 40;
  opacity: 0; visibility: hidden; transform: translateY(12px); pointer-events: none; transition: opacity .25s, transform .25s;
}
.float-cta.show { visibility: visible; opacity: 1; transform: none; pointer-events: auto; }

/* 进入动画（仅在 JS 可用时启用，保证无 JS 内容可见） */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .main-nav a { padding: 8px 9px; font-size: 14px; }
  .nav-phone { display: none; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .process { grid-template-columns: repeat(4, 1fr); row-gap: 32px; }
  .process::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 960px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; inset: 68px 0 auto 0; background: var(--dark-950); border-bottom: 1px solid rgba(255,255,255,.1);
    padding: 12px 24px 20px; display: none;
  }
  .nav-open .main-nav { display: block; }
  .main-nav ul { flex-direction: column; }
  .main-nav a { padding: 12px 10px; font-size: 16px; }
  .nav-actions .btn { display: none; }
  .hero-grid, .define, .fact-wrap, .quiz, .faq-wrap, .cta-grid { grid-template-columns: 1fr; gap: 40px; }
  .facts-card { grid-template-columns: 1fr; }
  .facts-label { border-right: 0; border-bottom: 1px solid var(--line); }
  .facts-dl { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .chain { grid-template-columns: 1fr; gap: 40px; max-width: 640px; margin-inline: auto; }
  .layer + .layer::before { left: 50%; top: -32px; transform: translateX(-50%) rotate(90deg); }
  .chain-bar { border-radius: 16px; }
  .score-card { position: static; }
  .section-head.left { text-align: center; margin-inline: auto; }
}
@media (max-width: 640px) {
  .container { padding-inline: 16px; }
  .section { padding: 64px 0; }
  .hero { padding-top: 44px; }
  .hero-lead { font-size: 16px; }
  .hero-proof { gap: 18px; }
  .hero-proof b { font-size: 24px; }
  .hero .ai-demo { margin: 0; }
  .hero .ai-meta { flex-wrap: wrap; gap: 6px 12px; }
  .grid-2, .grid-3, .grid-4, .pillars { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .process { grid-template-columns: 1fr 1fr; }
  .facts-body { padding: 22px 20px; }
  .facts-dl { grid-template-columns: 1fr 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .card { padding: 22px; }
  .form { padding: 22px; }
}

/* 自主研发标签（深色，与“全案服务”红色标签区分） */
@media (max-width: 374px) {
  .hero .ai-demo { padding: 12px; }
  .hero .ai-tabs { gap: 2px; }
  .hero .ai-tab { font-size: 12px; padding-inline: 2px; }
}
.layer .badge.badge-dark { background: var(--dark-800); }

/* ==========================================================
   内页组件（服务、行业、案例、百科、关于、联系等）
   ========================================================== */

/* 导航下拉菜单 */
.main-nav .has-sub { position: relative; display: flex; align-items: center; }
.sub-toggle { display: block; flex: none; width: 28px; height: 36px; border: 0; border-radius: 6px; background: transparent; color: #fff; cursor: pointer; position: relative; }
.sub-toggle::after { content: ""; position: absolute; left: 50%; top: 45%; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translate(-50%, -50%) rotate(45deg); }
.has-sub.open .sub-toggle::after { transform: translate(-50%, -20%) rotate(-135deg); }
.sub-menu {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 8px);
  min-width: 300px; padding: 10px; border-radius: 14px;
  background: var(--dark-900); border: 1px solid rgba(255,255,255,.1); box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.sub-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -14px; height: 14px; }
.has-sub.open .sub-menu, html:not(.js) .has-sub:hover .sub-menu, html:not(.js) .has-sub:focus-within .sub-menu { opacity: 1; visibility: visible; transform: translate(-50%, 4px); }
.main-nav .sub-menu ul { flex-direction: column; gap: 2px; }
.main-nav .sub-menu a { padding: 10px 14px; border-radius: 10px; }
.sub-menu b { display: block; color: #fff; font-size: 14.5px; font-weight: 600; }
.sub-menu span { display: block; font-size: 12.5px; color: rgba(255,255,255,.5); }
.sub-menu a:hover b { color: var(--accent-300); }

/* 内页标题区 */
.page-hero {
  position: relative; overflow: hidden; color: #fff; padding: 44px 0 76px;
  background:
    radial-gradient(700px 360px at 90% -20%, rgba(226,24,33,.32), transparent 60%),
    radial-gradient(600px 400px at -10% 120%, rgba(255,122,61,.14), transparent 60%),
    linear-gradient(180deg, var(--dark-950), var(--dark-900));
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 70% 0%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 0%, #000 20%, transparent 70%);
}
.page-hero .container { position: relative; }
.page-hero .kicker { color: var(--accent-300); }
.page-hero h1 { font-size: clamp(28px, 4vw, 46px); font-weight: 800; letter-spacing: -.02em; max-width: 860px; margin-bottom: 14px; }
.page-lead { font-size: 17.5px; color: rgba(255,255,255,.72); max-width: 760px; margin: 0; }
.page-meta { font-size: 13.5px; color: rgba(255,255,255,.5); margin: 16px 0 0; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 0; font-size: 13px; margin-bottom: 26px; }
.breadcrumb li { color: rgba(255,255,255,.75); }
.breadcrumb li + li::before { content: "/"; margin: 0 10px; color: rgba(255,255,255,.3); }
.breadcrumb a { color: rgba(255,255,255,.55); }
.breadcrumb a:hover { color: #fff; }

/* 本页要点（答案优先摘要） */
.page-summary { background: var(--bg); }
.summary-box {
  position: relative; top: -36px; margin-bottom: -36px;
  display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 22px; align-items: start;
  padding: 22px 26px; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--brand-500);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.summary-label b { display: block; font-size: 16px; }
.summary-label span { font-size: 12.5px; color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.summary-box p { margin: 0; font-size: 15.5px; color: var(--ink-2); }

/* 通用：两栏、清单、提示 */
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: start; }
.split.center { align-items: center; }
.prose-block h2 { font-size: clamp(24px, 3vw, 32px); }
.prose-block p { color: var(--ink-2); }
.section-dark .prose-block p { color: rgba(255,255,255,.7); }
.check-list { list-style: none; display: grid; gap: 10px; margin: 16px 0; }
.check-list li { position: relative; padding-left: 26px; color: var(--ink-2); font-size: 15px; }
.check-list li::before {
  content: ""; position: absolute; left: 3px; top: 8px; width: 12px; height: 7px;
  border-left: 2px solid var(--brand-500); border-bottom: 2px solid var(--brand-500); transform: rotate(-45deg);
}
.check-list li b { color: var(--ink); }
.notice {
  display: flex; gap: 12px; padding: 14px 18px; border-radius: 12px; font-size: 14px; color: #7a4a06;
  background: #fff8eb; border: 1px solid #f7deb0; margin-bottom: 28px;
}
.notice::before { content: "i"; flex: none; width: 20px; height: 20px; border-radius: 50%; background: var(--amber-500); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 700; font-family: var(--mono); margin-top: 1px; }
.center-link { text-align: center; margin: 36px 0 0; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; }
.panel h3 { font-size: 19px; }
.panel p { color: var(--muted); }

/* 步骤（自适应列数） */
.steps { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; counter-reset: st; }
.steps > li {
  position: relative; padding: 26px 24px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  counter-increment: st;
}
.steps > li::before {
  content: counter(st, decimal-leading-zero); display: block; font-family: var(--mono); font-weight: 800; font-size: 26px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 8px;
}
.steps h3 { font-size: 18px; margin-bottom: 6px; }
.steps p { font-size: 14.5px; color: var(--muted); margin: 0; }
.steps .deliver { display: block; margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); font-size: 13px; color: var(--ink-2); }
.steps .deliver b { color: var(--brand-600); }
.section-dark .steps > li { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.09); }
.section-dark .steps p { color: rgba(255,255,255,.62); }

/* 首页案例卡片（文字版） */
.case-sum { font-size: 14.5px; color: var(--ink-2); }
.case-steps { list-style: none; display: grid; gap: 6px; margin: 4px 0 18px; counter-reset: cs; }
.case-steps li { counter-increment: cs; font-size: 13.5px; color: var(--muted); padding-left: 28px; position: relative; }
.case-steps li::before { content: counter(cs); position: absolute; left: 0; top: 2px; width: 19px; height: 19px; border-radius: 50%; background: var(--brand-50); color: var(--brand-500); font-size: 11.5px; font-weight: 700; display: grid; place-items: center; font-family: var(--mono); }
.case .more, .post .more { margin-top: auto; font-size: 14px; font-weight: 600; }
.case .more::after, .post .more::after { content: " →"; }
.case-top h3 a { color: #fff; }

/* 文章 / 案例列表 */
.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: -20px 0 34px; list-style: none; }
.chips button {
  font: inherit; font-size: 14px; padding: 7px 16px; border-radius: 999px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); color: var(--ink-2); transition: .15s;
}
.chips button:hover { border-color: var(--brand-400); color: var(--brand-500); }
.chips button[aria-pressed="true"] { background: var(--dark-900); border-color: var(--dark-900); color: #fff; }
.post { display: flex; flex-direction: column; }
.tag {
  display: inline-block; align-self: flex-start; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
  background: var(--brand-50); color: var(--brand-600); margin-bottom: 12px;
}
.tag.tag-muted { background: var(--bg-soft); color: var(--muted); }
.post h3 { font-size: 19px; line-height: 1.45; }
.post h3 a { color: var(--ink); }
.post h3 a:hover { color: var(--brand-500); }
.post p { margin-bottom: 18px; }
.post-meta { font-size: 12.5px; color: var(--muted); margin: -4px 0 12px; font-family: var(--mono); }
.post.feature { grid-column: span 2; background: linear-gradient(135deg, #fff, var(--brand-50)); }
.post.feature h3 { font-size: 23px; }
.post[hidden] { display: none; }

/* 文章正文布局 */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; align-items: start; }
.article-layout > * { min-width: 0; }
.prose { min-width: 0; overflow-wrap: anywhere; font-size: 16.5px; line-height: 1.95; color: var(--ink-2); max-width: 780px; }
.prose > p:first-child { font-size: 18px; color: var(--ink); }
.prose h2 {
  font-size: 24px; color: var(--ink); margin: 44px 0 14px; padding-top: 8px;
  display: flex; gap: 12px; align-items: baseline;
}
.prose h2 .n { flex: none; white-space: nowrap; font-family: var(--mono); font-size: 15px; color: var(--brand-500); font-weight: 800; }
.prose h3 { font-size: 18px; color: var(--ink); margin: 26px 0 8px; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1em; }
.prose li { margin: 6px 0; }
.prose strong { color: var(--ink); }
.prose .table-wrap { margin: 20px 0; }
.callout {
  margin: 22px 0; padding: 18px 22px; border-radius: 12px; background: var(--bg-soft); border-left: 4px solid var(--brand-500);
  color: var(--ink); font-size: 15.5px;
}
.callout b { color: var(--brand-600); }
.checklist-box { margin: 30px 0; padding: 24px 26px; border-radius: var(--radius); background: var(--dark-900); color: #fff; }
.checklist-box h2 { color: #fff; margin-top: 0; }
.checklist-box ol { list-style: none; padding: 0; display: grid; gap: 10px; counter-reset: ck; }
.checklist-box li { counter-increment: ck; padding-left: 36px; position: relative; color: rgba(255,255,255,.82); margin: 0; }
.checklist-box li::before { content: counter(ck, decimal-leading-zero); position: absolute; left: 0; font-family: var(--mono); color: var(--accent-300); font-weight: 700; }
.checklist-box p { color: rgba(255,255,255,.6); margin: 14px 0 0; font-size: 14.5px; }
.toc { position: sticky; top: 96px; }
.toc-box { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.toc-box h2 { font-size: 13px; color: var(--muted); letter-spacing: .1em; margin-bottom: 10px; font-family: var(--mono); }
.toc-box ol { list-style: none; display: grid; gap: 2px; }
.toc-box a { display: block; padding: 6px 10px; border-radius: 8px; font-size: 14px; color: var(--ink-2); }
.toc-box a:hover, .toc-box a.active { background: var(--brand-50); color: var(--brand-600); }
.toc .btn { margin-top: 14px; }
.article-foot { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px 22px; }

/* 行业卡片 */
.industry { display: flex; flex-direction: column; }
.industry .ind-n { font-family: var(--mono); font-size: 13px; color: var(--brand-500); font-weight: 800; }
.industry h3 { margin: 6px 0 8px; }
.industry .qs { list-style: none; margin: 16px 0 0; padding-top: 14px; border-top: 1px dashed var(--line); display: grid; gap: 6px; }
.industry .qs li { font-size: 13.5px; color: var(--ink-2); padding-left: 18px; position: relative; }
.industry .qs li::before { content: "Q"; position: absolute; left: 0; font-family: var(--mono); font-weight: 800; color: var(--accent-400); font-size: 12px; top: 1px; }

/* 关于我们：事实表 */
.fact-table { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.fact-table div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 15px 20px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.fact-table div:nth-child(odd) { border-right: 1px solid var(--line); }
.fact-table dt { color: var(--muted); }
.fact-table dd { margin: 0; font-weight: 600; color: var(--ink); word-break: break-all; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 40px; align-items: start; }
.contact-cards { display: grid; gap: 14px; }
.contact-card { display: flex; gap: 16px; align-items: center; padding: 20px 22px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.contact-card .icon { margin: 0; flex: none; }
.contact-card small { display: block; font-size: 12.5px; color: var(--muted); }
.contact-card b { font-size: 17px; font-family: var(--mono); color: var(--ink); word-break: break-all; }
.contact-card a:hover b { color: var(--brand-500); }
.form-panel { border: 1px solid var(--line); box-shadow: var(--shadow); }

/* 表单结果：沟通摘要 */
.form-ok pre {
  text-align: left; white-space: pre-wrap; overflow-wrap: anywhere; font-family: var(--font); font-size: 13.5px; line-height: 1.8;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 14px 0; color: var(--ink-2);
}
.form-ok .ok-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.form-ok .ok-note { font-size: 12.5px; color: var(--muted); margin: 12px 0 0; }

/* 通用 CTA 横幅 */
.cta-band { padding: 72px 0; }
.cta-band-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 8px; }
.cta-band p { color: rgba(255,255,255,.7); margin: 0; max-width: 620px; }
.cta-band-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* 系统功能模块 */
.module { display: grid; grid-template-columns: 46px 1fr; gap: 16px; }
.module .icon { margin: 0; }
.module h3 { font-size: 17px; margin-bottom: 4px; }
.module ul { list-style: none; display: grid; gap: 4px; margin-top: 10px; }
.module li { font-size: 13.5px; color: var(--ink-2); padding-left: 14px; position: relative; }
.module li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-400); }

/* 系统界面示意 */
.mock { border-radius: var(--radius-lg); overflow: hidden; background: #fff; box-shadow: var(--shadow-lg); color: var(--ink); font-size: 12.5px; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: #d9dadf; }
.mock-bar span { margin-left: 10px; color: var(--muted); font-family: var(--mono); font-size: 11.5px; }
.mock-body { display: grid; grid-template-columns: 120px 1fr; min-height: 300px; }
.mock-side { background: var(--dark-900); padding: 14px 10px; display: grid; align-content: start; gap: 4px; }
.mock-side span { color: rgba(255,255,255,.55); padding: 6px 10px; border-radius: 6px; font-size: 12px; }
.mock-side span.on { background: rgba(226,24,33,.25); color: #fff; }
.mock-main { padding: 16px; display: grid; gap: 12px; align-content: start; }
.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mock-kpis div { border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
.mock-kpis small { color: var(--muted); display: block; font-size: 11px; }
.mock-kpis b { font-family: var(--mono); font-size: 18px; }
.mock-chart { height: 90px; border: 1px solid var(--line); border-radius: 8px; padding: 8px; }
.mock-chart svg { width: 100%; height: 100%; }
.mock-rows { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.mock-rows div { display: grid; grid-template-columns: 1fr 64px 52px; gap: 8px; padding: 7px 10px; border-bottom: 1px solid var(--line); }
.mock-rows div:last-child { border-bottom: 0; }
.mock-rows .y { color: var(--green-500); font-weight: 600; }
.mock-rows .n { color: var(--muted); }
.mock-caption { font-size: 12.5px; color: rgba(255,255,255,.45); margin-top: 12px; text-align: center; }

@media (max-width: 960px) {
  .main-nav .has-sub { flex-wrap: wrap; }
  .main-nav .has-sub > a { flex: 1; }
  .sub-toggle { display: block; width: 44px; height: 44px; border: 0; background: transparent; color: #fff; cursor: pointer; position: relative; }
  .sub-toggle::after { content: ""; position: absolute; left: 50%; top: 45%; width: 8px; height: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translate(-50%, -50%) rotate(45deg); transition: .2s; }
  .has-sub.open .sub-toggle::after { transform: translate(-50%, -20%) rotate(-135deg); }
  .sub-menu { position: static; transform: none; opacity: 1; visibility: visible; display: none; min-width: 0; width: 100%; box-shadow: none; background: rgba(255,255,255,.04); margin: 0 0 8px; }
  .has-sub:hover .sub-menu, .has-sub:focus-within .sub-menu { transform: none; }
  .has-sub.open .sub-menu { display: block; transform: none; }
  .main-nav { max-height: calc(100vh - 68px); overflow-y: auto; }
  .split, .article-layout, .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .toc { position: static; }
  .post.feature { grid-column: auto; }
  .summary-box { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 640px) {
  .page-hero { padding: 32px 0 64px; }
  .page-lead { font-size: 16px; }
  .fact-table { grid-template-columns: 1fr; }
  .fact-table div:nth-child(odd) { border-right: 0; }
  .fact-table div { grid-template-columns: 90px 1fr; }
  .mock-body { grid-template-columns: 1fr; }
  .mock-side { display: none; }
  .prose { font-size: 16px; }
  .cta-band { padding: 56px 0; }
}
.linkish { font: inherit; font-size: inherit; background: none; border: 0; padding: 0; margin-left: 8px; color: var(--brand-500); cursor: pointer; text-decoration: underline; }
.fact-steps.two { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) { .fact-steps.two { grid-template-columns: 1fr; } }
@media (min-width: 1101px) { .steps.cols-5 { grid-template-columns: repeat(5, 1fr); } .steps.cols-3 { grid-template-columns: repeat(3, 1fr); } }

/* 本地图示：正文完整展示，卡片概念封面允许按 16:9 裁切。 */
.media-figure { position: relative; min-width: 0; max-width: 100%; margin: 28px 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-soft); }
.media-original { display: block; min-width: 0; max-width: 100%; border-radius: var(--radius) var(--radius) 0 0; }
.media-image { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; border-radius: var(--radius) var(--radius) 0 0; background: var(--dark-900); }
.media-caption { padding: 12px 16px; color: var(--muted); font-size: 12.5px; line-height: 1.65; overflow-wrap: anywhere; }
.media-zoom { position: absolute; top: 12px; right: 12px; min-width: 44px; min-height: 44px; padding: 8px 14px; border: 1px solid rgba(255,255,255,.65); border-radius: 999px; background: rgba(21,23,27,.9); color: #fff; font: inherit; font-size: 13px; cursor: zoom-in; }
.media-zoom:hover { background: var(--brand-600); }
.media-zoom[hidden] { display: none; }
.media-original:focus-visible, .media-zoom:focus-visible { outline: 3px solid var(--accent-400); outline-offset: 3px; }
.post-media { margin: 0 0 20px; }
.post-media .media-image, img.post-media { aspect-ratio: 16 / 9; width: 100%; height: auto; object-fit: cover; }
.post-media .media-caption { padding: 10px 12px; font-size: 12px; }
.post-media .media-zoom { top: 8px; right: 8px; }
.hero-grid > *, .media-split > *, .industry-cards > *, .page-hero-content > * { min-width: 0; }
.hero .media-figure, .page-hero .media-figure, .section-dark .media-figure { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.05); }
.hero .media-caption, .page-hero .media-caption, .section-dark .media-caption { color: rgba(255,255,255,.78); }
.media-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.media-split .media-figure { margin: 0; }
.page-hero-with-media .page-hero-content { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 40px; align-items: center; }
.page-hero-with-media .media-figure { width: 100%; margin: 0; }
.page-hero-with-media .media-image { max-height: 360px; object-fit: contain; }
.industry-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 24px; }
.industry-card { min-width: 0; display: flex; flex-direction: column; }
.industry-card .media-figure { margin-top: 0; }
.industry-card .btn, .industry-card .more { align-self: flex-start; margin-top: auto; }
.information-section, .not-found { min-width: 0; overflow-wrap: anywhere; }
.not-found .hero-cta { justify-content: center; }

/* 原生 modal 配合显式键盘环绕；关闭和 Escape 均恢复原触发按钮。 */
.media-dialog-open { overflow: hidden; }
.media-dialog { width: min(1120px, calc(100vw - 40px)); max-width: calc(100vw - 40px); max-height: calc(100vh - 40px); max-height: calc(100dvh - 40px); margin: auto; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-lg); color: var(--ink); background: var(--bg); box-shadow: var(--shadow-lg); overflow: auto; overscroll-behavior: contain; }
.media-dialog::backdrop { background: rgba(12,15,21,.82); }
.media-dialog-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.media-dialog-top h2 { margin: 0; font-size: 18px; }
.media-dialog-close { flex: none; min-width: 64px; min-height: 44px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-soft); color: var(--ink); font: inherit; cursor: pointer; }
.media-dialog-close:hover { border-color: var(--brand-400); color: var(--brand-600); }
.media-dialog-image { display: block; width: 100%; height: auto; max-height: 66vh; max-height: 66dvh; object-fit: contain; border-radius: 8px; background: var(--bg-soft); }
.media-dialog-caption { margin: 14px 0 8px; font-size: 13px; line-height: 1.7; color: var(--muted); overflow-wrap: anywhere; }
.media-dialog-original { display: inline-flex; align-items: center; min-height: 44px; text-decoration: underline; font-size: 14px; }
@media (max-width: 960px) {
  .media-split { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .page-hero-with-media .page-hero-content { grid-template-columns: minmax(0, 1fr); gap: 28px; }
}
@media (max-width: 640px) {
  .media-figure { margin-block: 22px; }
  .media-caption { padding: 11px 12px; }
  .media-zoom { top: 8px; right: 8px; padding-inline: 12px; }
  .industry-cards { grid-template-columns: minmax(0, 1fr); }
  .media-dialog { width: calc(100vw - 20px); max-width: calc(100vw - 20px); max-height: calc(100vh - 20px); max-height: calc(100dvh - 20px); padding: 12px; border-radius: 16px; }
  .media-dialog-image { max-height: 62vh; max-height: 62dvh; }
}

/* 培训页课程总览：仅作用于本区域，不改变其他服务页。 */
.training-scope { padding-bottom: 48px; }
.training-scope .section-head { max-width: 960px; margin-bottom: 16px; }
.training-scope .section-head h2 { margin-bottom: 0; }
.training-scope .training-scope-intro { margin: 0 0 36px; text-align: center; color: var(--muted); }
.training-scope .training-plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.training-scope .training-plan-card { min-width: 0; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--bg); }
.training-scope .training-plan-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.training-scope .training-plan-number { display: grid; place-items: center; flex: none; width: 40px; height: 40px; border-radius: 12px; background: var(--brand-50); color: var(--brand-600); font: 600 14px var(--mono); }
.training-scope .training-plan-heading h3 { margin: 0; font-size: 22px; }
.training-scope dl { margin: 0; }
.training-scope dt { margin: 0 0 8px; color: var(--muted); font-size: 13px; font-weight: 500; }
.training-scope dd { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
.training-scope .training-plan-fields > div + div { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.training-scope .training-cooperation { margin-top: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-soft); }
.training-scope .training-cooperation summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 80px; padding: 20px 24px; cursor: pointer; list-style: none; border-radius: 16px; }
.training-scope .training-cooperation summary::-webkit-details-marker { display: none; }
.training-scope .training-cooperation summary:hover { background: #f0f0f2; }
.training-scope .training-cooperation-label { font-size: 16px; font-weight: 600; }
.training-scope .training-cooperation-hint { margin-left: 20px; color: var(--muted); font-size: 13px; font-weight: 400; }
.training-scope .training-cooperation-toggle { display: flex; flex: none; align-items: center; gap: 10px; color: var(--brand-600); font-size: 13px; font-weight: 600; }
.training-scope .training-cooperation-toggle svg { width: 18px; height: 18px; }
.training-scope .training-close-label { display: none; }
.training-scope .training-cooperation[open] .training-open-label { display: none; }
.training-scope .training-cooperation[open] .training-close-label { display: inline; }
.training-scope .training-cooperation[open] .training-cooperation-toggle svg { transform: rotate(180deg); }
.training-scope .training-cooperation-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 40px; margin: 0 24px; padding: 24px 0; border-top: 1px solid var(--line); }
.training-scope .training-cooperation-fields > div { min-width: 0; }
@media (min-width: 641px) and (max-width: 960px) {
  .training-scope .training-plan-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .training-scope .training-plan-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
  .training-scope .training-plan-fields > div + div { margin: 0; padding: 0 0 0 28px; border-top: 0; border-left: 1px solid var(--line); }
  .training-scope .training-cooperation-hint { display: block; margin: 4px 0 0; }
}
@media (max-width: 640px) {
  .training-scope { padding-bottom: 32px; }
  .training-scope .training-scope-intro { margin-bottom: 24px; font-size: 14px; }
  .training-scope .training-plan-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .training-scope .training-plan-card { padding: 22px; border-radius: 16px; }
  .training-scope .training-plan-heading { margin-bottom: 20px; }
  .training-scope .training-plan-heading h3 { font-size: 20px; }
  .training-scope .training-cooperation summary { padding: 18px; gap: 12px; }
  .training-scope .training-cooperation-hint { display: block; margin: 4px 0 0; font-size: 12px; }
  .training-scope .training-cooperation-toggle { gap: 4px; font-size: 12px; }
  .training-scope .training-cooperation-fields { grid-template-columns: minmax(0, 1fr); gap: 20px; margin-inline: 18px; padding-block: 20px; }
}

/* 服务范围卡片：沿用培训页规范，独立作用域保留既有页面。 */
.service-scope { padding-bottom: 48px; }
.service-scope .section-head { max-width: 960px; margin-bottom: 16px; }
.service-scope .section-head h2 { margin-bottom: 0; }
.service-scope .service-scope-intro { margin: 0 0 36px; text-align: center; color: var(--muted); }
.service-scope .service-plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.service-scope .service-plan-card { min-width: 0; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--bg); }
.service-scope .service-plan-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.service-scope .service-plan-number { display: grid; place-items: center; flex: none; width: 40px; height: 40px; border-radius: 12px; background: var(--brand-50); color: var(--brand-600); font: 600 14px var(--mono); }
.service-scope .service-plan-heading h3 { margin: 0; font-size: 22px; }
.service-scope dl { margin: 0; }
.service-scope dt { margin: 0 0 8px; color: var(--muted); font-size: 13px; font-weight: 500; }
.service-scope dd { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
.service-scope .service-plan-fields > div + div { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.service-scope .service-cooperation { margin-top: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-soft); }
.service-scope .service-cooperation summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 80px; padding: 20px 24px; cursor: pointer; list-style: none; border-radius: 16px; }
.service-scope .service-cooperation summary::-webkit-details-marker { display: none; }
.service-scope .service-cooperation summary:hover { background: #f0f0f2; }
.service-scope .service-cooperation-label { font-size: 16px; font-weight: 600; }
.service-scope .service-cooperation-hint { margin-left: 20px; color: var(--muted); font-size: 13px; font-weight: 400; }
.service-scope .service-cooperation-toggle { display: flex; flex: none; align-items: center; gap: 10px; color: var(--brand-600); font-size: 13px; font-weight: 600; }
.service-scope .service-cooperation-toggle svg { width: 18px; height: 18px; }
.service-scope .service-close-label { display: none; }
.service-scope .service-cooperation[open] .service-open-label { display: none; }
.service-scope .service-cooperation[open] .service-close-label { display: inline; }
.service-scope .service-cooperation[open] .service-cooperation-toggle svg { transform: rotate(180deg); }
.service-scope .service-cooperation-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 40px; margin: 0 24px; padding: 24px 0; border-top: 1px solid var(--line); }
.service-scope .service-cooperation-fields > div { min-width: 0; }
@media (min-width: 641px) and (max-width: 960px) {
  .service-scope .service-plan-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .service-scope .service-plan-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
  .service-scope .service-plan-fields > div + div { margin: 0; padding: 0 0 0 28px; border-top: 0; border-left: 1px solid var(--line); }
  .service-scope .service-cooperation-hint { display: block; margin: 4px 0 0; }
}
@media (max-width: 640px) {
  .service-scope { padding-bottom: 32px; }
  .service-scope .service-scope-intro { margin-bottom: 24px; font-size: 14px; }
  .service-scope .service-plan-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .service-scope .service-plan-card { padding: 22px; border-radius: 16px; }
  .service-scope .service-plan-heading { margin-bottom: 20px; }
  .service-scope .service-plan-heading h3 { font-size: 20px; }
  .service-scope .service-cooperation summary { padding: 18px; gap: 12px; }
  .service-scope .service-cooperation-hint { display: block; margin: 4px 0 0; font-size: 12px; }
  .service-scope .service-cooperation-toggle { gap: 4px; font-size: 12px; }
  .service-scope .service-cooperation-fields { grid-template-columns: minmax(0, 1fr); gap: 20px; margin-inline: 18px; padding-block: 20px; }
}

@media (min-width: 641px) and (max-width: 960px) {
  .service-scope .service-plan-fields > div:only-child { grid-column: 1 / -1; }
}

/* 文章目录：真实分类页与分页链接；不把全部文章加载后再隐藏。 */
.article-catalog { min-width: 0; }
.article-catalog .article-categories { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: -16px 0 30px; }
.article-catalog .article-categories a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 7px 18px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); background: var(--bg); font-size: 14px; }
.article-catalog .article-categories a:hover { border-color: var(--brand-400); color: var(--brand-600); }
.article-catalog .article-categories a[aria-current="page"] { background: var(--dark-900); border-color: var(--dark-900); color: #fff; }
.article-catalog .article-category-count { opacity: .7; font: 12px var(--mono); }
.article-catalog .article-list-summary { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-bottom: 20px; color: var(--muted); font-size: 13px; }
.article-catalog .article-list-summary p { margin: 0; }
.article-catalog .article-list-summary strong { color: var(--ink); font-weight: 600; }
.article-catalog .article-grid { align-items: stretch; }
.article-catalog .post { min-width: 0; overflow-wrap: anywhere; }
.article-catalog .post .more { margin-top: auto; padding-top: 4px; }
.article-catalog .article-empty { grid-column: 1 / -1; margin: 0; padding: 48px 24px; border: 1px dashed var(--line); border-radius: var(--radius); text-align: center; color: var(--muted); }
.article-catalog .article-pagination { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.article-catalog .pagination-numbers { display: flex; justify-content: center; align-items: center; gap: 6px; }
.article-catalog .article-pagination a, .article-catalog .article-pagination span[aria-current], .article-catalog .pagination-direction { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; min-width: 44px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink-2); background: var(--bg); font-size: 14px; }
.article-catalog .article-pagination a:hover { border-color: var(--brand-400); color: var(--brand-600); }
.article-catalog .article-pagination span[aria-current] { background: var(--brand-500); border-color: var(--brand-500); color: #fff; }
.article-catalog .pagination-direction[aria-disabled] { color: var(--muted); background: var(--bg-soft); }
.article-catalog .pagination-gap { min-width: 16px; text-align: center; color: var(--muted); }
.article-return { display: inline-flex; align-items: center; min-height: 44px; margin-bottom: 24px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; }
@media (max-width: 640px) {
  .article-catalog .article-categories { gap: 8px; margin-bottom: 24px; }
  .article-catalog .article-categories a { padding-inline: 14px; }
  .article-catalog .article-list-summary { gap: 6px; }
  .article-catalog .article-pagination { gap: 12px; }
  .article-catalog .pagination-numbers { order: -1; flex-basis: 100%; gap: 2px; }
  .article-catalog .pagination-numbers a, .article-catalog .pagination-numbers span[aria-current] { min-width: 40px; padding-inline: 8px; }
  .article-catalog .pagination-direction { min-width: 100px; }
}

/* 关于我们企业信息：每行一项，给名称、英文和联系方式完整的阅读宽度。 */
.company-facts { grid-template-columns: minmax(0, 1fr); min-width: 0; }
.company-facts > div { grid-template-columns: 80px minmax(0, 1fr); align-items: start; gap: 16px; padding: 14px 20px; line-height: 1.65; }
.company-facts > div:nth-child(odd) { border-right: 0; }
.company-facts > div:last-child { border-bottom: 0; }
.company-facts dt { white-space: nowrap; }
.company-facts dd { min-width: 0; word-break: normal; overflow-wrap: anywhere; }
@media (max-width: 480px) {
  .company-facts > div { grid-template-columns: minmax(0, 1fr); gap: 4px; padding: 13px 18px; }
  .company-facts dt { font-size: 12px; }
}


/* 首页 FACT 四步飞轮：四角正文与中央图，保留语义阅读顺序。 */
#method { padding: 56px 0; background: radial-gradient(ellipse at 50% 50%, rgba(78, 85, 92, .11), transparent 60%), #151a1e; }
#method .section-head { max-width: none; margin-bottom: 36px; }
#method .section-head .kicker { color: #ff9769; font-size: 14px; }
#method .section-head h2 { font-size: clamp(28px, 3.2vw, 42px); line-height: 1.35; letter-spacing: -.025em; }
#method .section-head > p { max-width: 1000px; margin-inline: auto; color: #bcc2c9; font-size: 16px; line-height: 1.8; }
#method .fact-wrap { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; align-items: center; min-height: 560px; }
#method .fact-visual { grid-area: 1 / 1; justify-self: center; align-self: center; width: 52%; max-width: 600px; min-width: 0; margin: 0; pointer-events: none; }
#method .fact-visual img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: contain; }
#method .fact-steps { grid-area: 1 / 1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 48%; row-gap: 48px; align-items: start; padding: 0; margin: 0; min-width: 0; }
#method .fact-step { display: block; min-width: 0; padding: 0; border: 0; border-radius: 0; background: none; transition: none; }
#method .fact-step:hover { background: none; border: 0; }
#method .fact-step:nth-child(1) { grid-column: 1; grid-row: 1; }
#method .fact-step:nth-child(2) { grid-column: 2; grid-row: 1; }
#method .fact-step:nth-child(3) { grid-column: 2; grid-row: 2; }
#method .fact-step:nth-child(4) { grid-column: 1; grid-row: 2; }
#method .fact-number { display: flex; align-items: center; gap: 16px; margin-bottom: 12px; color: #ff8253; font-family: var(--font); font-variant-numeric: tabular-nums; font-size: 28px; font-weight: 700; line-height: 1.1; }
#method .fact-number::after { content: ""; flex: 1; border-top: 1px solid rgba(255, 129, 81, .35); }
#method .fact-step h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 7px 13px; margin: 0 0 14px; color: #f6f7f8; font-size: 29px; line-height: 1.4; letter-spacing: -.02em; }
#method .fact-step h3 small { margin: 0; color: #98a4b2; font-family: var(--font); font-size: 14px; font-weight: 400; letter-spacing: .015em; }
#method .fact-step p { margin: 0; color: #c2c8cf; font-size: 17px; line-height: 1.7; overflow-wrap: anywhere; }
#method .fact-step .tags { display: grid; gap: 10px; margin-top: 23px; }
#method .fact-step .tags span { display: block; width: fit-content; max-width: 100%; position: relative; padding: 0 0 0 32px; border: 0; border-radius: 0; background: none; color: #e1e5e9; font-size: 17px; line-height: 1.25; overflow-wrap: anywhere; }
#method .fact-step .tags span::before { content: ""; position: absolute; left: 0; top: 0; width: 20px; height: 1.25em; background: url("method/minus-bold.svg") center / contain no-repeat; filter: invert(64%) sepia(62%) saturate(2120%) hue-rotate(326deg) brightness(104%) contrast(102%); }
#method .method-cycle-summary { display: flex; justify-content: center; align-items: center; gap: 26px; margin: 32px 0 0; color: #b7c0ca; font-family: var(--mono); font-size: 13px; line-height: 1.6; letter-spacing: .06em; }
#method .method-cycle-summary::before, #method .method-cycle-summary::after { content: ""; flex: 1; border-top: 1px solid rgba(162, 174, 187, .24); }
#method .method-cycle-summary span { flex: none; }
@media (min-width: 961px) and (max-width: 1100px) {
  #method .fact-step h3 { font-size: 24px; gap: 6px 10px; }
  #method .fact-step h3 small { font-size: 12px; }
  #method .fact-step p { font-size: 14px; }
  #method .fact-step .tags span { font-size: 15px; }
}
@media (max-width: 960px) {
  #method .section-head { margin-bottom: 32px; }
  #method .fact-wrap { grid-template-columns: minmax(0, 1fr); gap: 36px; min-height: 0; }
  #method .fact-visual { grid-area: 1 / 1; width: min(100%, 460px); max-width: 460px; }
  #method .fact-steps { grid-area: 2 / 1; column-gap: 36px; row-gap: 36px; }
  #method .fact-step:nth-child(n) { grid-column: auto; grid-row: auto; }
  #method .fact-step h3 { font-size: 25px; }
  #method .method-cycle-summary { margin-top: 40px; }
}
@media (max-width: 600px) {
  #method .section-head { margin-bottom: 22px; }
  #method .section-head > p { font-size: 14px; }
  #method .fact-wrap { gap: 30px; }
  #method .fact-visual { width: 100%; max-width: 400px; }
  #method .fact-steps { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  #method .fact-number { font-size: 25px; margin-bottom: 10px; }
  #method .fact-step h3 { font-size: 25px; margin-bottom: 10px; }
  #method .fact-step h3 small { font-size: 13px; }
  #method .fact-step p { font-size: 14px; }
  #method .fact-step .tags { gap: 10px; margin-top: 18px; }
  #method .fact-step .tags span { font-size: 15px; }
  #method .method-cycle-summary { margin-top: 32px; gap: 12px; font-size: 11px; letter-spacing: 0; }
}

/* 所有动态效果尊重系统减少动态偏好；不靠横向隐藏掩盖布局问题。 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}