/* ============================================================
   CWSE 乘物光能 · 官网样式
   Brand: var(--blue) 深蓝 / #23C45D 活力绿 / 白 35% 呼吸
   Style ref: xnrgyclub.com — 编辑式大字号 + 编号章节 + 留白
   ============================================================ */

:root {
  --blue: #002FA7;
  --blue-2: #0A4BBF;
  --blue-deep: #001B5E;
  --green: #23C45D;
  --mint: #E7F8E9;
  --purple: #6C4C98;
  --ink: #333333;
  --ink-2: #444444;
  --grey: #6B7280;
  --line: #E5E7EB;
  --bg: #F8F9FA;
  --white: #FFFFFF;
  --radius-btn: 8px;
  --radius-card: 12px;
  --radius-md: 16px;
  --shadow-card: 0 8px 24px rgba(0, 47, 167, .12);
  --shadow-btn: 0 4px 12px rgba(0, 47, 167, .15);
  --font-en: "Helvetica Neue", "Century Gothic", "Inter", sans-serif;
  --font-cn: "Helvetica Neue", "PingFang SC", "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  --nav-h: 72px;

  /* ---- 语义色（成功/错误/警告/信息）---- */
  --ok: #1c7a3e;
  --ok-bg: #E7F8E9;
  --err: #B32424;
  --err-bg: #FDECEC;
  --warn: #B45309;
  --warn-bg: #FEF3E2;
  --info: var(--blue);
  --info-bg: #EEF2FF;
  --amber: #F59E0B;
  --red: #EF4444;

  /* ---- 间距刻度（8px 基线）---- */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 64px;
  --sp-7: 96px;

  /* ---- 动效时长与缓动（统一节奏）---- */
  --dur-fast: 0.15s;
  --dur: 0.25s;
  --dur-slow: 0.4s;
  --dur-reveal: 0.7s;
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.2, .7, .2, 1);

  /* ---- 层级（统一 z-index）---- */
  --z-nav: 100;
  --z-progress: 101;
  --z-overlay: 900;
  --z-modal: 1000;
  --z-curtain: 9999;

  /* ---- 焦点环 ---- */
  --focus-ring: 0 0 0 3px rgba(0, 47, 167, .35);
  --focus-ring-light: 0 0 0 3px rgba(255, 255, 255, .45);

  /* ---- 科技感扩展 ---- */
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Roboto Mono", "Consolas", "Courier New", monospace;
  --glow-blue: 0 10px 30px rgba(0, 47, 167, .35);
  --grad-brand: linear-gradient(120deg, var(--blue) 0%, #0A4BBF 45%, #23C45D 120%);

  /* ===== 排版刻度（Type scale）=====
     收敛原有 24 种零散字号（含 12.5/13.5/14.5/15.5/16.5 等半像素）为 9 档 */
  --fs-2xs: 11px;
  --fs-xs:  12px;
  --fs-sm:  13px;
  --fs-base:15px;
  --fs-md:  16px;
  --fs-lg:  17px;
  --fs-xl:  20px;
  --fs-2xl: 24px;
  --fs-3xl: 32px;

  /* ===== 圆角刻度（Radius scale）=====
     收敛原有 15 种（1/2/3/6/8/10/12/14/16/18/22px + 50%/999px）为 5 档 */
  --r-xs:  4px;
  --r-sm:  8px;    /* 与 --radius-btn 同值 */
  --r-md:  12px;   /* 与 --radius-card 同值 */
  --r-lg:  18px;
  --r-pill: 999px;

  /* ===== 容器与栅格（瑞士风格：统一秩序）===== */
  --container: 1200px;         /* 主内容区 */
  --container-narrow: 780px;   /* 阅读/导语窄栏 */
  --gutter: 24px;              /* 左右安全边距 */

  /* ===== 章节留白（流式，大屏舒展 / 小屏紧凑）===== */
  --section-y:    clamp(64px, 9vw, 128px);
  --section-y-lg: clamp(72px, 11vw, 148px);

  /* ===== 阴影层次（Elevation）===== */
  --sh-1: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
  --sh-2: 0 4px 14px rgba(16, 24, 40, .07);
  --sh-3: 0 10px 28px rgba(0, 47, 167, .10);
  --sh-4: 0 22px 52px rgba(0, 47, 167, .16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  /* 中文在 300 字重下笔画发虚、可读性差；正文统一 400，装饰性大字另设 300 */
  font-weight: 400;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
section { scroll-margin-top: calc(var(--nav-h) + 20px); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: transparent;
  background: linear-gradient(90deg, var(--blue), #5AA0FF);
  -webkit-background-clip: text;
          background-clip: text;
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 10px;
}
.eyebrow::before {
  content: ''; width: 28px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), #5AA0FF);
  flex: 0 0 auto;
}
.eyebrow.light {
  background: none; -webkit-background-clip: initial; background-clip: initial;
  -webkit-text-fill-color: rgba(255, 255, 255, .82); color: rgba(255, 255, 255, .82);
}
.eyebrow.light::before { background: linear-gradient(90deg, var(--green), #9fd0ff); }
h2 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  color: var(--blue);
  line-height: 1.18;
  /* 大标题收紧字距，符合瑞士国际风格，避免中文标题松散 */
  letter-spacing: -.015em;
}
.section-head { margin-bottom: clamp(40px, 5vw, 64px); }
.section-head.center { text-align: center; }
.section-head .sub { color: var(--grey); font-size: var(--fs-lg); line-height: 1.7; margin-top: 14px; }
.sec-num {
  font-family: var(--font-mono);
  font-size: clamp(56px, 7vw, 88px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  letter-spacing: -.03em;
  margin-bottom: 18px;
  text-shadow: 0 0 26px rgba(0, 47, 167, .18);
}
.sec-num span { font-size: .35em; color: var(--green); font-weight: 600; letter-spacing: 0; }
.sec-num.dark span { color: var(--blue); opacity: .4; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 32px;
  border-radius: var(--radius-btn);
  font-weight: 600; font-size: 16px;
  cursor: pointer; border: none;
  transition: background var(--dur-fast) ease-in-out, transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  color: var(--white);
  box-shadow: 0 6px 18px rgba(0, 47, 167, .28);
  position: relative; overflow: hidden;
}
.btn-primary:not(.is-loading)::after {
  content: ''; position: absolute; top: 0; left: -130%; width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .42), transparent);
  transform: skewX(-20deg); transition: left .6s ease;
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-2) 0%, #0E57D6 100%);
  box-shadow: 0 10px 26px rgba(0, 47, 167, .42), 0 0 20px rgba(35, 196, 93, .28);
  transform: translateY(-2px);
}
.btn-primary:not(.is-loading):hover::after { left: 130%; }
.btn-light { background: var(--white); color: var(--blue); box-shadow: var(--shadow-btn); }
.btn-light:hover { background: var(--mint); transform: translateY(-2px); }
.btn-green { background: var(--green); color: var(--white); width: 100%; }
.btn-green:hover { background: #1eb152; }
.btn-ghost-light { background: transparent; color: var(--white); padding: 0 8px; }
.btn-ghost-light .arrow { transition: transform var(--dur) var(--ease-out); }
.btn-ghost-light:hover .arrow { transform: translateX(6px); }

/* 统一交互态：按下 / 禁用 / 键盘焦点 */
.btn:active { transform: translateY(1px) scale(.97); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn-light:focus-visible,
.btn-ghost-light:focus-visible { box-shadow: var(--focus-ring); }
.btn[disabled], .btn.is-loading {
  opacity: .65; cursor: not-allowed; pointer-events: none;
  filter: saturate(.85);
}
/* loading 内联转圈 */
.btn.is-loading { color: transparent !important; position: relative; }
.btn.is-loading::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  width: 18px; height: 18px; margin: -9px 0 0 -9px;
  border: 2px solid rgba(255, 255, 255, .45); border-top-color: var(--white);
  border-radius: 50%; animation: btnSpin .6s linear infinite;
}
@keyframes btnSpin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn.is-loading::after { animation-duration: 1.2s; }
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background-color .25s cubic-bezier(.4, 0, .2, 1), box-shadow .25s cubic-bezier(.4, 0, .2, 1), backdrop-filter .25s cubic-bezier(.4, 0, .2, 1);
}
.nav-inner {
  max-width: var(--container); margin: 0 auto; height: 100%;
  padding: 0 24px;
  display: flex; align-items: center; gap: 40px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { width: auto; object-fit: contain; }
.nav-logo img:not(.logo-dif) { height: 56px; }
.nav-logo img.logo-dif { height: 28px; }
.nav-logo .logo-x {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 300; line-height: 1;
  color: var(--white);
  opacity: .9;
  margin: 0 6px;
  min-width: 18px;
}
.nav.scrolled .logo-x { color: var(--blue); }
.nav-logo .logo-x.logo-color { display: none; }
.nav.scrolled .logo-x.logo-white { display: none; }
.nav.scrolled .logo-x.logo-color { display: inline-flex; }
.nav-logo .logo-color { display: none; }
.nav.scrolled { background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--line); }

/* —— 独立页专用深色 nav（报告页/雷达页，不引 main.js 时兜底） —— */
.nav.nav-dark { background: linear-gradient(180deg, var(--blue) 0%, #001B5E 100%); box-shadow: 0 1px 0 rgba(255,255,255,.08); }
/* 防御：若误加 .scrolled（如 report.js 滚动监听残留），深色外观必须胜出 */
.nav.nav-dark.scrolled { background: linear-gradient(180deg, var(--blue) 0%, #001B5E 100%); backdrop-filter: none; box-shadow: 0 1px 0 rgba(255,255,255,.08); }
.nav.nav-dark .logo-color,
.nav.nav-dark .logo-x.logo-color { display: none; }
/* 防御：scrolled 不得覆盖 nav-dark 的 logo 可见性 */
.nav.nav-dark.scrolled .logo-white,
.nav.nav-dark.scrolled .logo-x.logo-white { display: inline-flex !important; }
.nav.nav-dark.scrolled .logo-color,
.nav.nav-dark.scrolled .logo-x.logo-color { display: none !important; }
.nav.nav-dark .logo-x.logo-white,
.nav.nav-dark .logo-white { display: inline-flex; }
.nav.nav-dark .logo-x.logo-white { color: rgba(255,255,255,.85); }
.nav.nav-dark .nav-links a { color: rgba(255,255,255,.9); border-color: rgba(255,255,255,.16); background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02)); }
.nav.nav-dark .nav-links a::before { background: linear-gradient(135deg, rgba(35,196,93,.22), rgba(255,255,255,0)); }
.nav.nav-dark .nav-links a:hover { color: var(--white); border-color: rgba(255,255,255,.32); }
.nav.nav-dark .nav-links a.active { color: var(--white); border-color: rgba(35,196,93,.55); background: linear-gradient(135deg, rgba(35,196,93,.18), rgba(255,255,255,.04)); }
.nav.nav-dark .lang-switch { border-color: rgba(255,255,255,.22); }
.nav.nav-dark .lang-switch .lang-opt { color: rgba(255,255,255,.85); }
.nav.nav-dark .lang-switch .lang-opt:hover { background: rgba(255,255,255,.14); color: var(--white); }
.nav.nav-dark .btn-nav { background: var(--white); color: var(--blue); box-shadow: 0 2px 8px rgba(0,0,0,.18); }
.nav.nav-dark .btn-nav:hover { background: var(--mint); }
.nav.nav-dark .nav-burger span { background: var(--white); }
.nav.nav-dark.open .nav-links { background: var(--blue); box-shadow: 0 16px 32px rgba(0,0,0,.25); }
.nav.nav-dark.open .nav-links a { color: rgba(255,255,255,.92); border-bottom-color: rgba(255,255,255,.08); }
/* ===== 防御：.nav-dark.scrolled 永远保持深色外观（覆盖 .scrolled 的白色切换）===== */
.nav.nav-dark.scrolled .nav-links a { color: rgba(255,255,255,.9) !important; border-color: rgba(255,255,255,.16) !important; background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02)) !important; }
.nav.nav-dark.scrolled .nav-links a:hover { color: var(--white) !important; border-color: rgba(255,255,255,.32) !important; }
.nav.nav-dark.scrolled .nav-links a.active { color: var(--white) !important; border-color: rgba(35,196,93,.55) !important; background: linear-gradient(135deg, rgba(35,196,93,.18), rgba(255,255,255,.04)) !important; }
.nav.nav-dark.scrolled .btn-nav { background: var(--white) !important; color: var(--blue) !important; box-shadow: 0 2px 8px rgba(0,0,0,.18) !important; }
.nav.nav-dark.scrolled .lang-switch { border-color: rgba(255,255,255,.22) !important; }
.nav.nav-dark.scrolled .lang-switch .lang-opt { color: rgba(255,255,255,.85) !important; }
.nav.nav-dark.scrolled .logo-x { color: rgba(255,255,255,.85) !important; }
.nav.nav-dark.scrolled .nav-burger span { background: var(--white) !important; }
.nav.scrolled .logo-white { display: none; }
.nav.scrolled .logo-color { display: block; }
.nav.scrolled .nav-links a { color: var(--ink-2); }
.nav.scrolled .nav-links a:hover { color: var(--blue); }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: rgba(255, 255, 255, .78);
  position: relative; padding: 9px 16px;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, .1);
  transition: color .15s cubic-bezier(.4, 0, .2, 1), border-color .15s cubic-bezier(.4, 0, .2, 1);
}
.nav-links a::before {
  content: ''; position: absolute; inset: 0;
  border-radius: inherit; opacity: 0;
  background: linear-gradient(135deg, rgba(35, 196, 93, .18), rgba(255, 255, 255, 0));
  transition: opacity .2s;
}
.nav-links a:hover {
  color: var(--white);
  border-color: rgba(255, 255, 255, .28);
}
.nav-links a:hover::before { opacity: 1; }
.nav.scrolled .nav-links a {
  color: var(--ink-2);
  background: linear-gradient(135deg, rgba(0, 47, 167, .04), rgba(0, 47, 167, .01));
  border-color: rgba(0, 47, 167, .1);
}
.nav.scrolled .nav-links a::before {
  background: linear-gradient(135deg, rgba(0, 47, 167, .12), rgba(35, 196, 93, .06));
}
.nav.scrolled .nav-links a:hover {
  color: var(--blue);
  border-color: rgba(0, 47, 167, .22);
}
.nav-links a.active { color: var(--white); border-color: rgba(35, 196, 93, .5); }
.nav-links a.active::before { opacity: 1; }
.nav.scrolled .nav-links a.active { color: var(--blue); border-color: rgba(0, 47, 167, .32); }

/* —— 下拉菜单（CBAM 服务）—— */
.nav-item.has-sub { position: relative; display: flex; align-items: center; }
.nav-item.has-sub > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-item.has-sub > a::after {
  content: '';
  display: inline-block;
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: .55;
  transition: transform .2s var(--ease, ease), opacity .2s var(--ease, ease);
  margin-left: 2px;
}
.nav-item.has-sub:hover > a::after,
.nav-item.has-sub.pinned > a::after,
.nav-item.has-sub.open > a::after { transform: rotate(180deg); opacity: .9; }
.nav-item.has-sub.active > a { color: var(--white); border-color: rgba(35, 196, 93, .5); }
.nav.scrolled .nav-item.has-sub.active > a { color: var(--blue); border-color: rgba(0, 47, 167, .32); }
.nav-sub {
  position: absolute;
  top: calc(100% + 10px); left: 50%;
  transform: translate(-50%, -8px);
  min-width: 200px;
  list-style: none;
  margin: 0; padding: 8px;
  background: linear-gradient(180deg, rgba(0, 47, 167, .96), rgba(0, 47, 167, .88));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .22), 0 0 0 1px rgba(255, 255, 255, .04);
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s var(--ease, ease), transform .2s var(--ease, ease), visibility .2s var(--ease, ease);
  z-index: 100;
  pointer-events: none;
}
.nav-item.has-sub:hover > .nav-sub,
.nav-item.has-sub.pinned > .nav-sub,
.nav-item.has-sub.open > .nav-sub {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
  pointer-events: auto;
}
/* 浅色页面背景（scrolled 状态）下用实色加深，确保白字对比度 */
.nav.scrolled .nav-sub {
  background: linear-gradient(180deg, #002FA7, #001D6B);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .28), 0 0 0 1px rgba(255, 255, 255, .08);
}
.nav.scrolled .nav-sub::before {
  background: #002FA7;
  border-top-color: rgba(255, 255, 255, .08);
  border-left-color: rgba(255, 255, 255, .08);
}
/* 锁死下拉子项白字：.nav.scrolled .nav-links a 特异性 (0,3,1) 会覆盖 .nav-sub a (0,1,1)，
   需用 (0,4,1) 反制（子菜单 a 既是 .nav-links 后代也是 .nav-sub 后代） */
.nav.scrolled .nav-links .nav-sub a,
.nav.scrolled .nav-links .nav-sub a:hover {
  color: #fff !important;
  background: transparent !important;
  border: none !important;
  transform: none !important;
}
.nav.scrolled .nav-links .nav-sub a:hover { background: rgba(255, 255, 255, .14) !important; }
.nav-sub::before {
  content: '';
  position: absolute; top: -6px; left: 50%;
  width: 12px; height: 12px;
  transform: translateX(-50%) rotate(45deg);
  background: rgba(0, 47, 167, .96);
  border-top: 1px solid rgba(255, 255, 255, .14);
  border-left: 1px solid rgba(255, 255, 255, .14);
  border-radius: 2px;
}
.nav-sub li { margin: 0; }
.nav-sub a {
  display: flex; align-items: center;
  padding: 10px 14px;
  font-size: 14px; font-weight: 500;
  color: rgba(255, 255, 255, .92);
  background: transparent !important;
  border: none !important;
  border-radius: 8px;
  white-space: nowrap;
  text-align: left;
  transform: none !important;
}
.nav-sub a::before { display: none !important; }
.nav-sub a:hover {
  background: rgba(255, 255, 255, .14) !important;
  color: var(--white) !important;
}
.btn-nav { height: 40px; padding: 0 22px; font-size: 14px; background: var(--white); color: var(--blue); box-shadow: none; }
.btn-nav:hover { background: var(--mint); }
.nav.scrolled .btn-nav { background: var(--blue); color: var(--white); box-shadow: var(--shadow-btn); }
.nav.scrolled .btn-nav:hover { background: var(--blue-2); }
.nav-burger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--white); transition: .25s; }
.nav.scrolled .nav-burger span { background: var(--blue); }
/* green-export 复用同款汉堡与 CTA（与标准页组件保持一致） */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--white); transition: .25s; }
.nav.scrolled .nav-toggle span { background: var(--blue); }
.nav-cta { height: 40px; padding: 0 22px; font-size: 14px; display: inline-flex; align-items: center; border-radius: var(--radius-btn); background: var(--white); color: var(--blue); text-decoration: none; box-shadow: none; }
.nav-cta:hover { background: var(--mint); }
.nav.scrolled .nav-cta { background: var(--blue); color: var(--white); box-shadow: var(--shadow-btn); }
.nav.scrolled .nav-cta:hover { background: var(--blue-2); }

/* ===== 账户系统 · 导航登录组件（auth-nav.js 双容器） =====
 * #acctSlot  桌面右上 CTA 位（替换预约咨询按钮）；移动端隐藏
 * [data-acct] nav-links 内静态入口（移动抽屉保留）；桌面隐藏
 * 已登录 → auth-nav.js 把 data-acct 文案改成昵称并追加 ▾（无下拉，跳 account） */
.acct-desktop { display: inline-flex; align-items: center; }
.nav-links a[data-acct="1"] { display: none; }        /* 桌面：抽屉入口让位于右上 CTA */
@media (max-width: 768px) {
  .acct-desktop { display: none; }                     /* 移动：右上 CTA 位隐藏 */
  .nav-links a[data-acct="1"] { display: inline-block; } /* 移动抽屉恢复登录入口 */
}
.nav.open .nav-links a[data-acct="1"] { color: var(--ink-2); }
.nav.open .nav-links a[data-acct="1"]:hover { color: var(--blue); }

.nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle span { transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }

/* ---------- 跳转主内容（键盘可达性） ---------- */
.skip-link {
  position: absolute; left: 16px; top: -64px; z-index: 1200;
  background: var(--blue); color: var(--white); padding: 10px 18px;
  border-radius: var(--radius-btn); font-size: 14px; font-weight: 600;
  text-decoration: none; box-shadow: var(--shadow-btn);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; outline: none; box-shadow: var(--focus-ring-light); }

/* ---------- 语言切换（多语言群组） ---------- */
.lang-switch {
  display: inline-flex; align-items: center; gap: 2px;
  margin-left: 4px; padding: 3px;
  border: 1px solid rgba(255, 255, 255, .25); border-radius: 22px;
  font-family: var(--font-en);
  transition: border-color .15s;
}
.nav.scrolled .lang-switch { border-color: var(--line); }
.lang-switch .lang-opt {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 18px;
  font-size: 12px; font-weight: 600; letter-spacing: .04em; white-space: nowrap;
  color: rgba(255, 255, 255, .7);
  transition: background .15s, color .15s;
}
.lang-switch .lang-opt:hover { color: var(--white); background: rgba(255, 255, 255, .12); }
/* 隐藏当前语言按钮，仅显示其他可切换语言（桌面+移动端均生效） */
.lang-switch .lang-opt.active { display: none; }
.nav.open .lang-switch .lang-opt.active { display: none; }
.nav.scrolled .lang-switch .lang-opt { color: var(--blue); }
.nav.scrolled .lang-switch .lang-opt:hover { background: rgba(0, 47, 167, .08); color: var(--blue); }
.lang-switch .flag { display: inline-block; width: 18px; height: 12px; object-fit: cover; border-radius: 1px; box-shadow: 0 0 0 1px rgba(0,0,0,.12); }
/* lang-switch inside mobile dropdown */
.nav.open .lang-switch { margin: 12px 0 4px; justify-content: center; }
.nav.open .lang-switch .lang-opt { font-size: 14px; padding: 9px 12px; }
.nav.open .lang-switch .flag { width: 22px; height: 15px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  background-color: var(--blue-deep);
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px),
    radial-gradient(circle at 28% 18%, rgba(90, 170, 255, .22), transparent 55%),
    linear-gradient(135deg, var(--blue-deep) 0%, var(--blue) 55%, var(--blue-2) 100%);
  background-size: 46px 46px, 46px 46px, 100% 100%, 220% 220%;
  background-position: center, center, center, 0% 30%;
  animation: heroBgShift 9s ease-in-out infinite;
  color: var(--white);
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 0 40px;
}
.hero-map { position: absolute; inset: 0; opacity: .5; pointer-events: none; z-index: 1; animation: mapDrift 28s linear infinite alternate; }
.hero-map svg { width: 100%; height: 100%; }
.hero-glow {
  position: absolute; right: -10%; top: -20%;
  width: 60vw; height: 60vw; border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 196, 93, .18) 0%, transparent 60%);
  pointer-events: none; z-index: 1;
  animation: glowPulse 11s ease-in-out infinite;
}

/* ---------- Hero 鼠标跟随光斑（金色光晕跟随） ---------- */
.hero-glow-cursor {
  position: absolute; left: 0; top: 0;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 175, 55, .22) 0%, rgba(0, 47, 167, .08) 35%, transparent 70%);
  pointer-events: none; z-index: 2;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity .4s cubic-bezier(.4, 0, .2, 1);
  will-change: left, top;
}
.hero:hover .hero-glow-cursor { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .hero-glow-cursor { display: none; }
}

.hero-ai {
  position: absolute; right: 2vw; top: 50%; transform: translateY(-50%);
  height: 74vh; width: auto; max-width: 48vw;
  opacity: .95;
  pointer-events: none;
  z-index: 1;
}
@media (prefers-reduced-motion: reduce) { .hero-ai { opacity: .85; } }

/* ---------- AI 原生 · 引擎底座区 ---------- */
.ai-engine { padding: var(--section-y) 0; background: linear-gradient(180deg,var(--white) 0%,#f3f7fe 100%); }
.ai-engine .section-head { text-align: center; }
.ai-engine .section-head h2 { color: var(--blue,var(--blue)); }
.ai-engine-lead { max-width: var(--container-narrow); margin: 10px auto 38px; text-align: center; color: #5b6478; font-size: 16px; line-height: 1.7; }
.ai-layers { display: flex; flex-direction: column; gap: 14px; max-width: 1000px; margin: 0 auto; }
.ai-layer { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; padding: 20px 26px; border-radius: 16px; border: 1px solid #e3e9f6; background: var(--white); box-shadow: 0 6px 22px rgba(20,40,90,.05); }
.ai-layer-tag { flex: 0 0 116px; font-weight: 800; font-size: 15px; color: var(--blue,var(--blue)); letter-spacing: .5px; }
.ai-layer-items { display: flex; flex-wrap: wrap; gap: 10px; }
.ai-pill { padding: 7px 15px; border-radius: var(--r-pill); background: #eef2fb; color: #2a3450; font-size: 14px; font-weight: 600; }
.ai-pill.strong { font-weight: 800; color: var(--white); }
.ai-layer.base { border-color: var(--blue,var(--blue)); background: linear-gradient(120deg,var(--blue) 0%,#0b3fae 100%); box-shadow: 0 16px 44px rgba(0,47,167,.22); }
.ai-layer.base .ai-layer-tag { color: var(--white); }
.ai-layer.base .ai-pill { background: rgba(255,255,255,.16); color: var(--white); }
.ai-engine-foot { max-width: var(--container-narrow); margin: 30px auto 0; text-align: center; font-size: 17px; font-weight: 700; color: var(--blue,var(--blue)); }
@media (max-width: 768px) {
  .ai-layer { flex-direction: column; align-items: flex-start; gap: 12px; }
  .ai-layer-tag { flex: none; }
}

/* ---------- AI Ambient 信号气泡 ---------- */
.ai-chip { display: inline-flex; align-items: center; gap: 9px; margin-top: 20px; padding: 9px 16px; border-radius: var(--r-pill); background: rgba(0,47,167,.16); border: 1px solid rgba(125,155,240,.55); color: #e3ebff; font-size: 13.5px; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.ai-chip-dot { width: 8px; height: 8px; border-radius: 50%; background: #23C45D; box-shadow: 0 0 0 0 rgba(35,196,93,.6); animation: chipPulse 1.8s ease-out infinite; }
.ai-chip-text { font-weight: 600; }
@keyframes chipPulse { 0% { box-shadow: 0 0 0 0 rgba(35,196,93,.55); } 70% { box-shadow: 0 0 0 10px rgba(35,196,93,0); } 100% { box-shadow: 0 0 0 0 rgba(35,196,93,0); } }
@media (prefers-reduced-motion: reduce) { .ai-chip-dot { animation: none; } }

/* ---------- 模块 AI 徽章（按 html[lang] 自动切换文案，零 HTML 改动） ---------- */
.module .mod-head { position: relative; }
.module .mod-head::after {
  content: "AI 驱动";
  position: absolute; top: 0; right: 0;
  font-size: 11px; font-weight: 700; letter-spacing: .5px;
  color: var(--blue,var(--blue));
  background: #eaf0fe; border: 1px solid #c7d6f7;
  padding: 3px 9px; border-radius: var(--r-pill);
}
html[lang="en"] .module .mod-head::after { content: "AI-Powered"; }
html[lang="zh-HK"] .module .mod-head::after { content: "AI 驅動"; }

/* ---------- 背景动效（高级感 · GPU 友好 · 仅 transform/opacity） ---------- */
@keyframes orbA {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(11vw, 8vh, 0) scale(1.2); }
  100% { transform: translate3d(-7vw, -6vh, 0) scale(.9); }
}
@keyframes orbB {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-9vw, 10vh, 0) scale(1.22); }
  100% { transform: translate3d(7vw, -8vh, 0) scale(1.04); }
}
@keyframes orbC {
  0%   { transform: translate3d(0, 0, 0) scale(1); opacity: .85; }
  50%  { transform: translate3d(9vw, -6vh, 0) scale(1.16); opacity: 1; }
  100% { transform: translate3d(-6vw, 7vh, 0) scale(.9); opacity: .8; }
}
/* 光晕自动漂浮 + 呼吸：取消鼠标跟随后由动画接管，营造缓慢游移的高级感 */
@keyframes glowPulse {
  0%   { transform: translate3d(0, 0, 0) scale(1); opacity: .8; }
  50%  { transform: translate3d(-6vw, 6vh, 0) scale(1.28); opacity: 1; }
  100% { transform: translate3d(4vw, -4vh, 0) scale(1.06); opacity: .9; }
}
@keyframes mapDrift {
  0%   { transform: scale(1.08) translate3d(0, 0, 0); }
  100% { transform: scale(1.08) translate3d(-2.4%, -2.4%, 0); }
}
/* 流动渐变底色：让深色区块呈现缓慢游移的光泽，最直观的高级感 */
@keyframes heroBgShift {
  0%   { background-position: 0% 30%; }
  50%  { background-position: 100% 70%; }
  100% { background-position: 0% 30%; }
}
@keyframes dataBgShift {
  0%   { background-position: 100% 20%; }
  50%  { background-position: 0% 80%; }
  100% { background-position: 100% 20%; }
}

/* hero 流动光晕：两枚缓动光球，营造呼吸般的层次纵深 */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(46px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}
.hero::before {
  width: 50vw; height: 50vw; left: -10vw; top: 4vh;
  background: radial-gradient(circle at 50% 50%, rgba(35, 196, 93, .38), rgba(35, 196, 93, 0) 62%);
  animation: orbA 9s ease-in-out infinite;
}
.hero::after {
  width: 46vw; height: 46vw; right: -8vw; bottom: -12vh;
  background: radial-gradient(circle at 50% 50%, rgba(90, 170, 255, .42), rgba(90, 170, 255, 0) 62%);
  animation: orbB 11s ease-in-out infinite;
}

/* data 区块：呼应 hero 的光晕语言，保持全站一致的高级感 */
.data::before,
.data::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(44px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}
.data::before {
  width: 44vw; height: 44vw; left: -6vw; top: -8vh;
  background: radial-gradient(circle at 50% 50%, rgba(35, 196, 93, .34), rgba(35, 196, 93, 0) 62%);
  animation: orbC 11s ease-in-out infinite;
}
.data::after {
  width: 48vw; height: 48vw; right: -10vw; bottom: -14vh;
  background: radial-gradient(circle at 50% 50%, rgba(90, 170, 255, .38), rgba(90, 170, 255, 0) 62%);
  animation: orbB 13s ease-in-out infinite;
}
.hero-inner { position: relative; max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; z-index: 3; }
.hero-kicker {
  font-family: var(--font-en);
  font-size: clamp(13px, 1.4vw, 16px);
  font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: rgba(255, 255, 255, .65);
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(40px, 7vw, 96px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: .01em;
}
.hero-title span { display: block; }
.hero-title .line { white-space: nowrap; }
.hero-title .accent { font-style: normal; color: var(--green); white-space: nowrap; }
.hero-slogan {
  margin-top: 30px;
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 500;
  color: rgba(255, 255, 255, .85);
  letter-spacing: .06em;
}
.hero-ctas { display: flex; align-items: center; gap: 28px; margin-top: 44px; flex-wrap: wrap; }

.hero-data {
  position: relative;
  max-width: 1200px; width: 100%;
  margin: 80px auto 0; padding: 32px 24px 0;
  border-top: 1px solid rgba(255, 255, 255, .18);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.hd-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700; letter-spacing: -.02em; line-height: 1.1;
  text-shadow: 0 0 22px rgba(90, 170, 255, .35);
}
.hd-item strong i { font-style: normal; font-size: .55em; font-weight: 600; margin-left: 2px; }
.hd-item .count { display: inline; font-size: inherit; color: inherit; margin: 0; }
.hd-item > span { display: block; margin-top: 6px; font-size: 13px; color: rgba(255, 255, 255, .6); }

.hero-scroll {
  position: absolute; bottom: 26px; right: 32px; z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255, 255, 255, .55);
  font-family: var(--font-en); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero-scroll svg { animation: bounce 1.8s infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ---------- 价值主张 strip ---------- */
.value-strip { padding: var(--section-y) 0; background: var(--white); }
.value-lead { font-size: clamp(17px, 1.8vw, 21px); color: var(--ink-2); max-width: var(--container-narrow); margin-bottom: 64px; }
.value-lead strong { color: var(--blue); }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.value-item {
  border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 32px;
  transition: transform .2s ease-out, box-shadow .2s ease-out, border-color .2s;
  background: var(--white);
}
.value-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); border-color: var(--blue); }
.vi-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--mint); color: var(--green);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.vi-icon svg { width: 26px; height: 26px; }
.value-item h4 { font-size: 20px; color: var(--blue); margin-bottom: 10px; font-weight: 600; }
.value-item p { font-size: 15px; color: var(--ink-2); }

/* ---------- 分栏布局（sticky 侧栏） ---------- */
.split { display: grid; grid-template-columns: 380px 1fr; gap: 72px; align-items: start; }
.split-side { position: sticky; top: calc(var(--nav-h) + 40px); align-self: start; }
.split-side h2 { margin-bottom: 20px; font-size: clamp(28px, 3.2vw, 40px); word-break: keep-all; }
.side-note { color: var(--grey); font-size: 15px; margin-bottom: 28px; }

/* ---------- 01 时代背景 ---------- */
.why { padding: var(--section-y) 0; background: var(--bg); }
.rule-card {
  display: grid; grid-template-columns: 110px 1fr 190px; gap: 32px; align-items: center;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 36px;
  margin-bottom: 20px;
  transition: transform .2s ease-out, box-shadow .2s ease-out;
}
.rule-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.rule-index {
  font-family: var(--font-en); font-weight: 600; font-size: 13px;
  letter-spacing: .08em; color: var(--green);
  text-transform: uppercase;
}
.rule-body h3 { font-size: 22px; color: var(--blue); margin-bottom: 8px; white-space: nowrap; }
.rule-body p { font-size: 15px; color: var(--ink-2); line-height: 1.65; }
.rule-body strong { color: var(--blue); }

/* 查看详情提示 */
.rule-cta {
  display: inline-flex; align-items: center; gap: 5px;
  margin-top: 8px; font-size: 13px; font-weight: 600;
  color: var(--green); cursor: pointer;
  transition: gap .2s ease;
}
.rule-cta:hover { gap: 8px; }
.rule-cta::after {
  content: '→'; font-family: var(--font-en);
  transition: transform .2s ease;
}
.rule-cta:hover::after { transform: translateX(3px); }
.rule-data { text-align: right; border-left: 1px solid var(--line); padding-left: 28px; }
.rule-data strong {
  display: block; font-family: var(--font-en);
  font-size: 38px; font-weight: 700; letter-spacing: -.03em; color: var(--blue); line-height: 1;
}
.rule-data strong span { font-size: .6em; }
.rule-data > span { font-size: 12px; color: var(--grey); }

/* ---- rule-card 可点击暗示 ---- */
.rule-card { cursor: pointer; }
.rule-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.rule-card:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* ---- 详情面板遮罩 ---- */
.detail-backdrop {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .35);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0; visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
  z-index: 98;
}
.detail-backdrop.visible { opacity: 1; visibility: visible; }

/* ---- 卡片区左移让位 ---- */
.split-main {
  transition: transform .4s cubic-bezier(.4, 0, .2, 1), filter .35s ease;
  will-change: transform;
}
.split-main.detail-open {
  transform: translateX(-28%);
  filter: brightness(.88);
}
@media (max-width: 1024px) {
  .split-main.detail-open { transform: translateX(-36%); }
}

/* ---- 右侧滑入详情面板 ---- */
.rule-detail-overlay {
  position: fixed; top: 0; right: 0;
  width: min(960px, 92vw); max-width: 100vw;
  height: 100vh; height: 100dvh;
  background: var(--white);
  box-shadow: -8px 0 40px rgba(15, 23, 42, .14);
  transform: translateX(100%);
  transition: transform .4s cubic-bezier(.4, 0, .2, 1);
  z-index: 99;
  overflow-y: auto; overflow-x: hidden;
  overscroll-behavior: contain;
}
.rule-detail-overlay.open { transform: translateX(0); }

/* 面板内部结构 */
.rule-detail { display: none; padding: 44px 36px 48px; }
.rule-detail.active { display: block; animation: detailFadeIn .3s ease both; }
@keyframes detailFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.detail-close {
  position: absolute; top: 18px; right: 18px;
  width: 36px; height: 36px;
  border: 1px solid var(--line); border-radius: 50%;
  background: var(--white); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; line-height: 1; color: var(--ink-2);
  transition: all .2s ease; z-index: 2;
}
.detail-close:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }
.detail-close:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.detail-tag {
  display: inline-block; font-family: var(--font-en); font-weight: 600;
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--green); background: rgba(35, 196, 93, .08);
  padding: 5px 14px; border-radius: var(--r-pill); margin-bottom: 18px;
}
.detail-title {
  font-size: clamp(22px, 2.6vw, 30px); font-weight: 700;
  color: var(--blue); line-height: 1.25; margin-bottom: 8px;
}
.detail-subtitle {
  font-size: 14px; color: var(--grey); margin-bottom: 32px; padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

/* 关键点列表 */
.detail-section { margin-bottom: 28px; }
.detail-section h4 {
  font-size: 13px; font-family: var(--font-en); font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-2); margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.detail-section h4::before {
  content: ''; width: 4px; height: 16px; background: var(--green);
  border-radius: 2px; flex-shrink: 0;
}
.detail-points { list-style: none; padding: 0; margin: 0; }
.detail-points li {
  position: relative; padding: 10px 0 10px 24px; font-size: 14.5px;
  color: var(--ink-2); line-height: 1.65; border-bottom: 1px solid rgba(0,0,0,.04);
}
.detail-points li:last-child { border-bottom: none; }
.detail-points li::before {
  content: '✦'; position: absolute; left: 0; top: 11px;
  color: var(--green); font-size: 11px;
}
.detail-points li strong { color: var(--blue); font-weight: 600; }

/* 时间线 */
.detail-timeline {
  display: flex; flex-direction: column; gap: 10px; margin-top: 12px;
}
.detail-tl-item {
  display: flex; align-items: baseline; gap: 14px;
  font-size: 14px; color: var(--ink-2);
}
.detail-tl-year {
  font-family: var(--font-en); font-weight: 700; font-size: 17px;
  color: var(--blue); white-space: nowrap; min-width: 52px;
}
.detail-tl-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green); flex-shrink: 0; margin-top: 7px;
}
.detail-tl-text { font-size: 14px; color: var(--ink-2); line-height: 1.55; }

/* 底部 CTA */
.detail-cta {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 28px; padding: 13px 26px;
  background: var(--blue); color: var(--white); font-weight: 600; font-size: 14px;
  border: none; border-radius: var(--radius-btn); cursor: pointer;
  text-decoration: none; transition: all .2s ease;
}
.detail-cta:hover { background: var(--blue-dark, #002060); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(0,47,167,.25); }
.detail-cta:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

/* 移动端适配 */
@media (max-width: 768px) {
  .rule-detail-overlay { width: 94vw; }
  .rule-detail { padding: 32px 24px 40px; }
  .detail-title { font-size: 22px; }
  .split-main.detail-open { transform: translateX(-4%); filter: brightness(.96); }
}

/* reduced-motion 降级 */
@media (prefers-reduced-motion: reduce) {
  .split-main, .rule-detail-overlay, .detail-backdrop,
  .rule-detail.active { transition-duration: .01ms !important; animation: none !important; }
  .rule-detail.active { opacity: 1; transform: none; }
}

/* ---------- 02 绊脚石 ---------- */
.obstacles { padding: var(--section-y) 0; background: var(--mint); }
.obs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.obs-card {
  position: relative; background: var(--white); border-radius: var(--radius-card);
  padding: 40px 32px 32px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .2s ease-out, box-shadow .2s ease-out;
}
.obs-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.obs-num {
  position: absolute; top: 14px; right: 20px;
  font-family: var(--font-en); font-size: 64px; font-weight: 700;
  color: var(--blue); opacity: .20; letter-spacing: -.03em;
}
.obs-card h3 { font-size: 22px; color: var(--blue); margin-bottom: 12px; }
.obs-card > p { font-size: 15px; color: var(--ink-2); min-height: 78px; }
.obs-card strong { color: #d9534f; }
.obs-meter { margin-top: 24px; }
.obs-meter i {
  display: block; height: 6px; width: var(--v, 50%);
  background: linear-gradient(90deg, var(--blue), var(--green));
  border-radius: 3px;
  transform-origin: left;
}
.obs-meter span { display: block; margin-top: 10px; font-size: 12px; color: var(--grey); letter-spacing: .04em; }

/* ---------- 03 服务模块 ---------- */
.modules { padding: var(--section-y) 0; background: var(--white); }
.module-list { display: flex; flex-direction: column; gap: 28px; }
.module {
  position: relative;
  border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 44px;
  background: var(--white);
  box-shadow: 0 4px 24px rgba(0, 0, 0, .04);
  transition: border-color .2s, box-shadow .25s ease-out, transform .25s ease-out;
}
.module + .module { margin-top: 0; }
.module:hover { border-color: var(--blue); box-shadow: var(--shadow-card); transform: translateY(-2px); }
.mod-head { display: flex; gap: 24px; align-items: flex-start; margin-bottom: 18px; }
.mod-num {
  font-family: var(--font-en); font-size: 56px; font-weight: 700;
  color: var(--green); line-height: 1; letter-spacing: -.03em;
}
.mod-en { font-family: var(--font-en); font-size: 13.5px; font-weight: 500; color: var(--grey); letter-spacing: .03em; }
.mod-head h3 { font-size: clamp(22px, 2.4vw, 28px); color: var(--blue); font-weight: 700; line-height: 1.3; }
.mod-desc { color: var(--ink-2); font-size: 15.5px; margin-bottom: 28px; max-width: 720px; }
.mod-body { display: grid; grid-template-columns: 1fr 250px; gap: 32px; align-items: start; }
.mod-caps li {
  position: relative; padding: 14px 0 14px 22px;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px; color: var(--ink-2);
}
.mod-caps li:last-child { border-bottom: none; }
.mod-caps li::before {
  content: ""; position: absolute; left: 0; top: 24px;
  width: 8px; height: 8px; border-radius: 50%; background: var(--green);
}
.mod-caps strong { display: block; color: var(--blue); font-size: 15.5px; margin-bottom: 2px; }
.mod-photo img {
  border-radius: var(--radius-card);
  aspect-ratio: 4 / 3.4; object-fit: cover; width: 100%;
}
.mod-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.mod-steps > div {
  background: var(--mint); border-radius: var(--radius-card); padding: 22px;
}
.mod-steps i {
  font-family: var(--font-en); font-style: normal; font-weight: 700;
  color: var(--green); font-size: 13px; letter-spacing: .06em;
}
.mod-steps strong { display: block; color: var(--blue); font-size: 16px; margin: 4px 0 6px; }
.mod-steps p { font-size: 13.5px; color: var(--ink-2); }
.mod-data {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 32px; padding-top: 28px;
  border-top: 1px solid var(--line);
}
.mod-data > div {
  border-left: 3px solid var(--green);
  background: var(--bg);
  border-radius: 0 8px 8px 0;
  padding: 16px 18px;
}
.mod-data strong {
  display: block; font-family: var(--font-en);
  font-size: 30px; font-weight: 700; letter-spacing: -.02em; color: var(--blue); line-height: 1.1;
}
.mod-data span { font-size: 12.5px; color: var(--grey); }

/* ---------- 04 关键数据 ---------- */
.data {
  position: relative;
  padding: var(--section-y-lg) 0;
  background: linear-gradient(160deg, var(--blue-deep), var(--blue) 60%, var(--blue-2));
  background-size: 220% 220%;
  animation: dataBgShift 11s ease-in-out infinite;
  color: var(--white);
  overflow: hidden;
}
.data-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .14;
  mix-blend-mode: luminosity;
}
.data .container { position: relative; z-index: 2; }
.data h2 { color: var(--white); }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.data-card {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform .25s cubic-bezier(.2,.7,.2,1), background .2s, border-color .2s;
}
.data-card:hover { transform: translateY(-2px); background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .28); }
.data-card::after {
  content: '';
  display: block;
  width: 40px; height: 2px; border-radius: 1px;
  background: var(--green);
  margin-top: 20px;
}
.dc-label {
  display: inline-block; font-size: 11px; font-weight: 500; text-transform: uppercase;
  color: rgba(255, 255, 255, .6); letter-spacing: .08em; margin-bottom: 14px;
}
.data-card strong {
  display: block; font-family: var(--font-en);
  font-size: clamp(42px, 4.5vw, 60px); font-weight: 700; letter-spacing: -.03em; line-height: 1;
  margin-bottom: 10px;
}
.data-card strong i { font-style: normal; font-size: .35em; font-weight: 500; opacity: .6; }
.data-card p { font-size: 13.5px; color: rgba(255, 255, 255, .58); line-height: 1.6; }

/* ---------- 05 服务流程 ---------- */
.process { padding: var(--section-y) 0; background: #F4F6F9; }
.proc-line {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
  counter-reset: step;
  position: relative;
}
.proc-line::before {
  content: ""; position: absolute; top: 27px; left: 4%; right: 4%;
  height: 2px; background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 16px);
}
.proc-line li { position: relative; text-align: center; padding: 0 10px; }
.proc-line i {
  display: flex; align-items: center; justify-content: center;
  width: 54px; height: 54px; margin: 0 auto 18px;
  border-radius: 50%; background: var(--mint);
  font-family: var(--font-en); font-style: normal; font-weight: 700; font-size: 15px;
  color: var(--blue);
  border: 2px solid var(--white); box-shadow: 0 0 0 2px var(--mint);
  position: relative; z-index: 1;
  transition: background .2s, color .2s, transform .2s ease-out;
}
.proc-line li:hover i { background: var(--blue); color: var(--white); transform: scale(1.08); }
.proc-line li.active i { background: var(--blue); color: var(--white); transform: scale(1.06); box-shadow: 0 0 0 4px rgba(0, 47, 167, .15); }
.proc-line li.done i { background: var(--green); color: var(--white); border-color: var(--green); box-shadow: 0 0 0 2px rgba(35, 196, 93, .25); }
.proc-line li.done::after { width: 100%; background: var(--green); }
.proc-line strong { display: block; color: var(--blue); font-size: 16.5px; margin-bottom: 6px; }
.proc-line p { font-size: 12.5px; color: var(--grey); line-height: 1.6; }


/* ---------- 06 核心优势 ---------- */
.advantages { padding: var(--section-y) 0; background: var(--bg); }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.adv-card {
  background: var(--white); border-radius: var(--radius-card);
  padding: 36px 32px;
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s;
  display: flex;
  flex-direction: column;
}
/* AI 原生卡片突出 */
.adv-card:first-child {
  background: linear-gradient(135deg, #f0f5ff 0%, #e8f0fe 100%);
  border-color: var(--blue);
  position: relative;
  overflow: hidden;
}
.adv-card:first-child::before {
  content: '';
  position: absolute;
  top: -1px; right: -1px;
  width: 80px; height: 80px;
  background: radial-gradient(circle at top right, rgba(0,47,167,.08), transparent 70%);
  pointer-events: none;
}
.adv-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); border-color: var(--blue); }
.adv-num {
  font-family: var(--font-en); font-size: 15px; font-weight: 700;
  color: var(--green); letter-spacing: .1em;
  display: block; margin-bottom: 18px;
}
.adv-card h3 { font-size: 21px; color: var(--blue); margin-bottom: 12px; }
.adv-card > p { font-size: 14.5px; color: var(--ink-2); flex: 1; }
.adv-card h3 + p { margin-bottom: 8px; }
.adv-value {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px !important; color: var(--green) !important; font-weight: 500;
}
.cobrand {
  position: relative; border-radius: 16px; overflow: hidden;
  background: linear-gradient(120deg, var(--blue-deep), var(--blue));
  padding: 72px 48px;
  text-align: center; color: var(--white);
}
.cobrand-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .16; mix-blend-mode: luminosity;
}
.cobrand-inner { position: relative; }
.cobrand-logos { display: flex; align-items: center; justify-content: center; gap: 20px; margin-bottom: 24px; }
.cobrand-logos img { width: auto; object-fit: contain; }
.cobrand-logos img:not(.logo-dif) { height: 72px; }
.cobrand-logos img.logo-dif { height: 36px; }
.cobrand-x { font-size: 28px; font-weight: 300; opacity: .5; }
.cobrand-logo { height: 56px; width: auto; margin: 0 auto 24px; }
.cobrand h3 { font-size: clamp(24px, 3vw, 34px); font-weight: 700; margin-bottom: 12px; }
.cobrand p { color: rgba(255, 255, 255, .8); font-size: 16px; letter-spacing: .06em; }

/* ---------- 07 Footer / 联系 ---------- */
.footer {
  background: linear-gradient(180deg, var(--blue-deep), #071f42);
  color: var(--white);
  padding: 110px 0 40px;
}
.foot-cta { text-align: center; margin-bottom: 80px; }
.foot-cta h2 { color: var(--white); font-size: clamp(34px, 5vw, 60px); line-height: 1.25; }
.foot-cta h2 span { color: var(--green); }
.foot-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; margin-bottom: 80px; }
.foot-form, .foot-info {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px; padding: 40px;
}
.foot-form h4, .foot-info h4 { font-size: 20px; margin-bottom: 8px; }
.foot-form > p { font-size: 14px; color: rgba(255, 255, 255, .6); margin-bottom: 24px; }
.diag-note { font-size: 13px; line-height: 1.65; color: rgba(255, 255, 255, .72); margin: -6px 0 20px; padding: 12px 14px; background: rgba(255, 255, 255, .05); border-left: 2px solid var(--green); border-radius: var(--r-sm); }
.diag-note strong { color: var(--white); }
.frow { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.foot-form input, .foot-form textarea {
  width: 100%; padding: 13px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .07);
  color: var(--white); font-size: 16px; font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
  margin-bottom: 14px; resize: vertical;
}
.foot-form input::placeholder, .foot-form textarea::placeholder { color: rgba(255, 255, 255, .4); }
.foot-form input:focus, .foot-form textarea:focus {
  outline: none; border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(35, 196, 93, .2);
}

/* ---------- 表单全局基础（深色页脚可覆盖）---------- */
input, textarea, select { font-family: inherit; font-size: 16px; color: var(--ink); }
.field-error {
  display: none; font-size: 12.5px; line-height: 1.4;
  color: var(--err); margin: -8px 0 12px;
}
.foot-form .field-error { color: #ff9b9b; }
input.is-error, textarea.is-error, select.is-error {
  border-color: var(--red) !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, .28) !important;
}
input.is-error + .field-error,
textarea.is-error + .field-error,
select.is-error + .field-error { display: block; }
input:disabled, textarea:disabled, select:disabled { opacity: .55; cursor: not-allowed; }
.f-hint { font-size: 12px; color: rgba(255, 255, 255, .45); margin-top: 12px; text-align: center; }
.contact-list li {
  display: flex; gap: 18px; align-items: baseline;
  padding: 14px 0; border-bottom: 1px dashed rgba(255, 255, 255, .14);
  font-size: 16px;
}
.contact-list li span {
  flex: 0 0 44px; font-size: 13px; color: rgba(255, 255, 255, .5); letter-spacing: .1em;
}
.contact-list a:hover { color: var(--green); }
.contact-list li.contact-name {
  display: block; padding: 10px 0 6px;
  border-bottom: 1px solid rgba(255,255,255,.2);
  font-size: 16px; font-weight: 600; color: var(--white); letter-spacing: .05em;
}
.foot-qr { display: flex; align-items: center; gap: 16px; margin-top: 26px; }
.foot-qr img { width: 96px; height: auto; border-radius: var(--r-sm); background: var(--white); padding: 6px; }
.foot-qr span { font-size: 13px; color: rgba(255, 255, 255, .6); }
.foot-nav {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
  margin-bottom: 60px; padding-top: 60px;
  border-top: 1px solid rgba(255, 255, 255, .08);
}
.foot-nav h4 { color: var(--white); font-size: 15px; font-weight: 600; margin-bottom: 14px; }
.foot-nav a {
  display: block; color: rgba(255, 255, 255, .5); font-size: 13.5px; text-decoration: none;
  padding: 4px 0; transition: color .15s;
}
.foot-nav a:hover { color: rgba(255, 255, 255, .85); }
.foot-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding-top: 32px;
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
}
.foot-logos { display: flex; align-items: center; gap: 16px; }
.foot-logo { height: 48px; width: auto; object-fit: contain; }
.foot-logo-dif { height: 24px; width: auto; opacity: .9; object-fit: contain; }
.foot-x {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 300; line-height: 1;
  color: var(--white);
  opacity: .7;
  margin: 0 4px;
}
.foot-names { font-size: 13px; color: rgba(255, 255, 255, .65); display: grid; grid-template-columns: auto auto; gap: 0 32px; }
.foot-names p { margin: 0; }
.foot-names em { font-style: normal; font-family: var(--font-en); opacity: .7; margin-left: 8px; }
.copyright { margin-left: auto; font-size: 12px; color: rgba(255, 255, 255, .4); }
.admin-link { color: inherit; text-decoration: none; opacity: .55; transition: opacity .15s ease; }
.admin-link:hover { opacity: .9; text-decoration: underline; }

/* ---------- 表单确认弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 999;
  background: rgba(0, 0, 0, .6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay[hidden] { display: none; }
.modal-card {
  background: var(--white); border-radius: var(--radius-card);
  padding: 40px; max-width: 480px; width: 100%;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .25);
}
.modal-card h3 { font-size: 22px; margin-bottom: 6px; color: var(--blue); }
.modal-sub { font-size: 14px; color: var(--grey); margin-bottom: 24px; }
.modal-preview {
  list-style: none; padding: 0; margin: 0 0 24px;
  background: var(--bg); border-radius: var(--radius-md); padding: 16px 20px;
}
.modal-preview li { font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.modal-preview li:last-child { border: 0; }
.modal-preview li b { color: var(--blue); font-weight: 500; display: inline-block; width: 56px; }
.modal-actions { display: flex; gap: 12px; }
.btn-ghost { background: transparent; color: var(--grey); border: 1px solid var(--line); font-size: 15px; }
.btn-ghost:hover { background: var(--bg); color: var(--ink-2); }

/* ---------- 滚动渐显 ---------- */
/* 注意：隐藏规则不加 html.js 前缀，否则优先级高于 .reveal.in 导致内容永久隐藏。
   无 JS 降级改用各页面 <noscript> 内联样式实现。 */
.reveal { opacity: 0; transform: translateY(var(--enter-y, 16px)) rotate(var(--enter-rotate, -1.5deg)); filter: blur(var(--enter-blur, 0px)); transition: opacity var(--enter-dur, 0.7s) var(--enter-ease, ease-out), transform var(--enter-dur, 0.7s) var(--enter-ease, ease-out), filter var(--enter-dur, 0.7s) var(--enter-ease, ease-out); transition-delay: var(--enter-delay, 0s); }
.reveal.in { opacity: 1; transform: none; filter: blur(0); }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
.reveal.d5 { transition-delay: .4s; }

/* ---------- 首屏块级 stagger：对齐 DeepSeek ds-hero-enter 实测参数 ----------
   DeepSeek 实测：延迟 0 / 0.15 / 0.3 / 0.4s，时长 0.7 / 0.8 / 0.9s，ease-out。
   用 nth-child 精确指定（特异性 0,3,0 高于 d1-d5 的 0,2,0，故可覆盖手动延迟）。
   注意 hero-title 占 nth-child(2)，逐字动画独立处理，不在此列。 */
.hero-inner > .reveal:nth-child(1) { --enter-delay: 0s;    --enter-dur: 0.9s; --enter-y: 20px; }
.hero-inner > .reveal:nth-child(3) { --enter-delay: 0.15s; --enter-dur: 0.8s; --enter-y: 20px; }
.hero-inner > .reveal:nth-child(4) { --enter-delay: 0.3s;  --enter-dur: 0.7s; --enter-y: 20px; }
.hero-inner > .reveal:nth-child(5) { --enter-delay: 0.4s;  --enter-dur: 0.9s; --enter-y: 20px; }

/* ---------- 旋转流光边框（DeepSeek rotating-border 范式） ---------- */
@keyframes rotatingBorder { to { --border-angle: 360deg; } }
.glow-border { position: relative; z-index: 0; }
.glow-border::before {
  content: ''; position: absolute; inset: -2px; border-radius: inherit;
  background: conic-gradient(from var(--border-angle, 0deg), #002FA7, #D4AF37, #002FA7);
  z-index: -1; animation: rotatingBorder 3s linear infinite;
  opacity: 0; transition: opacity .35s ease; pointer-events: none;
}
.glow-border:hover::before { opacity: 1; }

/* ---------- Hero 标题逐字 stagger（DeepSeek ds-hero-enter 错峰范式） ---------- */
@keyframes chIn { to { opacity: 1; transform: translateY(0); } }
.split-ready .ch {
  opacity: 0; transform: translateY(10px);
  animation: chIn .45s ease-out forwards;
  animation-delay: calc(var(--ch-i, 0) * 45ms);
}
.split-ready .ch-space { opacity: 1 !important; transform: none !important; animation: none !important; }
.split-ready .accent { animation-delay: calc(var(--ch-i, 0) * 45ms + 80ms); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll svg { animation: none; }
  .glow-border::before { animation: none; }
  .split-ready .ch { opacity: 1; transform: none; animation: none; }
  .hero::before, .hero::after, .data::before, .data::after,
  .hero-glow, .hero-map, .hero, .data { animation: none !important; }
  .hero, .data { background-position: 50% 50% !important; }
  * { transition-duration: .01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split-side { position: static; }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .proc-line { grid-template-columns: repeat(3, 1fr); gap: 32px 0; }
  .proc-line::before { display: none; }
  .hero-tree { opacity: .1; height: 60vh; }
}
@media (max-width: 768px) {
  .nav-links, .btn-nav, .nav-cta { display: none; }
  .nav-burger, .nav-toggle { display: flex; }
  .nav.open .nav-links {
    display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--white); padding: 12px 24px 20px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, .1);
  }
  .nav.open .nav-links a { color: var(--ink-2); padding: 14px 0; border-bottom: 1px solid var(--line); text-align: center; }
  /* 移动端：下拉子菜单变成可点击展开 */
  .nav.open .nav-item.has-sub { display: block; }
  .nav.open .nav-item.has-sub > a {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%;
    color: var(--ink-2); padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  .nav.open .nav-item.has-sub > a::after {
    transform: rotate(0); opacity: .7;
    border-top-color: var(--ink-2);
  }
  .nav.open .nav-item.has-sub.open > a::after { transform: rotate(180deg); opacity: 1; }
  .nav.open .nav-sub {
    position: static; transform: none;
    min-width: 0; width: 100%;
    background: rgba(0, 47, 167, .04);
    backdrop-filter: none; -webkit-backdrop-filter: none;
    border: none; border-radius: 8px;
    box-shadow: none;
    margin: 0 0 8px 16px; padding: 0;
    max-height: 0; overflow: hidden;
    opacity: 0; visibility: hidden;
    transition: max-height .25s var(--ease, ease), opacity .2s var(--ease, ease), visibility .25s var(--ease, ease), padding .25s var(--ease, ease);
  }
  .nav.open .nav-item.has-sub.open > .nav-sub {
    max-height: 200px;
    opacity: 1; visibility: visible;
    padding: 4px 0;
  }
  .nav.open .nav-sub::before { display: none; }
  .nav.open .nav-sub a {
    color: var(--ink-2); padding: 10px 16px; font-size: 14px;
    border-bottom: 1px solid rgba(0, 0, 0, .06);
  }
  .nav.open .nav-sub a:hover { background: rgba(0, 47, 167, .06) !important; color: var(--blue) !important; }
  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero-title { font-size: 38px; }
  .hero-data { grid-template-columns: repeat(2, 1fr); margin-top: 56px; }
  .hd-item strong { white-space: nowrap; font-size: 26px; }
  .hero-scroll { display: none; }
  .value-grid, .obs-grid, .adv-grid, .foot-grid, .mod-body, .mod-steps { grid-template-columns: 1fr; }
  .rule-card { grid-template-columns: 1fr; gap: 16px; padding: 28px; }
  .rule-data { text-align: left; border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 16px; }
  .module { padding: 28px 22px; }
  .mod-head { gap: 16px; }
  .mod-num { font-size: 40px; }
  .mod-data { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr; }
  .proc-line { grid-template-columns: repeat(2, 1fr); }
  .frow { grid-template-columns: 1fr; gap: 0; }
  .foot-form, .foot-info { padding: 28px 22px; }
  .cobrand { padding: 48px 24px; }
  .copyright { margin-left: 0; }
  .mobile-cta { display: flex; }
  body { padding-bottom: 70px; }
  .back-top { display: none; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 30px; }
  .hero-title .line { white-space: normal; }
  .hd-item strong { font-size: 22px; }
  .foot-form input, .foot-form textarea { font-size: 16px; }
}

/* ============================================================
   ENHANCEMENTS · 加载幕布 / 滚动进度条 / 回顶 / Hero 字符 / 表单
   ============================================================ */

/* ---- 加载幕布 ---- */
.intro-curtain {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--blue);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease, visibility .6s;
}
.intro-curtain::after {
  content: ''; position: absolute; left: 50%; bottom: 12vh;
  width: 80px; height: 3px;
  background: rgba(255, 255, 255, .12);
  border-radius: 2px; overflow: hidden;
  transform: translateX(-50%);
}
.intro-curtain::before {
  content: ''; position: absolute; left: 50%; bottom: 12vh;
  width: 80px; height: 3px;
  background: var(--green);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: introBar 1.1s ease-out forwards;
}
@keyframes introBar {
  0% { transform: translateX(-90px); }
  100% { transform: translateX(-50%); }
}
.intro-curtain .intro-logo {
  color: var(--white); font-family: var(--font-en);
  font-weight: 700; font-size: 32px;
  letter-spacing: .08em;
  opacity: 0; transform: translateY(8px);
  animation: introLogo .8s ease-out forwards;
}
@keyframes introLogo { to { opacity: 1; transform: translateY(0); } }
html:not(.ready) body { overflow: hidden; }
html:not(.ready) .intro-curtain { opacity: 1; visibility: visible; }
html.ready .intro-curtain { opacity: 0; visibility: hidden; pointer-events: none; }

/* ---- 滚动进度条 ---- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 3px;
  background: transparent;
  z-index: 100;
  pointer-events: none;
}
.scroll-progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--blue), var(--green));
  transition: width .08s linear;
  box-shadow: 0 1px 4px rgba(35, 196, 93, .4);
}
.nav.scrolled ~ .scroll-progress-fill,
.scroll-progress-fill { /* keep visible */ }

/* ---- 回到顶部 ---- */
.back-top {
  position: fixed; right: 28px; bottom: 28px;
  width: 48px; height: 48px;
  background: var(--blue); color: var(--white);
  border: none; border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 47, 167, .35);
  opacity: 0; visibility: hidden;
  transform: translateY(20px);
  transition: opacity .25s, transform .25s, background .2s;
  z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--blue-2); transform: translateY(-3px); }
.back-top svg { display: block; }

/* ---- 移动端常驻 CTA 条 ---- */
.mobile-cta {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 998;
  gap: 10px; padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
  background: rgba(255, 255, 255, .97);
  box-shadow: 0 -6px 24px rgba(0, 0, 0, .14);
}
.mobile-cta a {
  flex: 1; text-align: center; padding: 13px 0; border-radius: 10px;
  font-size: 15px; font-weight: 600; text-decoration: none; line-height: 1.1;
}
.mc-call { background: var(--blue); color: var(--white); }
.mc-diag { background: var(--mint, #23C45D); color: #04210f; }

/* ---- Hero 标题字符逐字 reveal ---- */
.hero-title { display: block; }
.hero-title.split-ready { white-space: normal; }
.hero-title.split-ready .line { display: block; }
.hero-title.split-ready .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em) rotateX(-30deg);
  animation: chIn .8s cubic-bezier(.2,.7,.2,1) forwards;
}
.hero-title.split-ready .ch-space {
  display: inline-block;
  white-space: pre;
  opacity: 0;
  animation: chIn .5s cubic-bezier(.2,.7,.2,1) forwards;
  width: 0.3em; /* ensure visible word spacing */
}
@keyframes chIn {
  0% { opacity: 0; transform: translateY(.5em) rotateX(-30deg); }
  100% { opacity: 1; transform: translateY(0) rotateX(0); }
}
/* 每个字符错开 0.04s，前 30 个 */
.hero-title.split-ready .ch:nth-child(1) { animation-delay: .05s; }
.hero-title.split-ready .ch:nth-child(2) { animation-delay: .09s; }
.hero-title.split-ready .ch:nth-child(3) { animation-delay: .13s; }
.hero-title.split-ready .ch:nth-child(4) { animation-delay: .17s; }
.hero-title.split-ready .ch:nth-child(5) { animation-delay: .21s; }
.hero-title.split-ready .ch:nth-child(6) { animation-delay: .25s; }
.hero-title.split-ready .ch:nth-child(7) { animation-delay: .29s; }
.hero-title.split-ready .ch:nth-child(8) { animation-delay: .33s; }
.hero-title.split-ready .ch:nth-child(9) { animation-delay: .37s; }
.hero-title.split-ready .ch:nth-child(10) { animation-delay: .41s; }
.hero-title.split-ready .ch:nth-child(11) { animation-delay: .45s; }
.hero-title.split-ready .ch:nth-child(12) { animation-delay: .49s; }
.hero-title.split-ready .ch:nth-child(13) { animation-delay: .53s; }
.hero-title.split-ready .ch:nth-child(14) { animation-delay: .57s; }
.hero-title.split-ready .ch:nth-child(15) { animation-delay: .61s; }
.hero-title.split-ready .ch:nth-child(16) { animation-delay: .65s; }
.hero-title.split-ready .ch:nth-child(17) { animation-delay: .69s; }
.hero-title.split-ready .ch:nth-child(18) { animation-delay: .73s; }
.hero-title.split-ready .ch:nth-child(19) { animation-delay: .77s; }
.hero-title.split-ready .ch:nth-child(20) { animation-delay: .81s; }
.hero-title.split-ready .ch:nth-child(n+21) { animation-delay: .85s; }

/* ---- Hero 副标题 / 数据带延迟入场 ---- */
html.ready .hero-kicker,
html.ready .hero-slogan,
html.ready .hero-ctas,
html.ready .hero-data {
  opacity: 0;
  animation: fadeUp .7s cubic-bezier(.2,.7,.2,1) forwards;
}
html.ready .hero-kicker { animation-delay: .55s; }
html.ready .hero-title { animation-delay: 0; }
html.ready .hero-slogan { animation-delay: .85s; }
html.ready .hero-ctas { animation-delay: 1.05s; }
html.ready .hero-data { animation-delay: 1.25s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- 表单提交状态 ---- */
/* ---- 全局 Toast 反馈（操作确认/提示）---- */
.toast-wrap {
  position: fixed;
  left: 50%; bottom: 28px;
  transform: translateX(-50%);
  z-index: 1100;
  display: flex; flex-direction: column; gap: 10px;
  width: max-content; max-width: calc(100vw - 32px);
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  min-width: 240px; max-width: 420px;
  padding: 12px 18px;
  border-radius: var(--radius-btn);
  background: #1f2937; color: var(--white);
  font-size: 14px; font-weight: 500; line-height: 1.4;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
  opacity: 0; transform: translateY(12px);
  animation: toastIn .28s var(--ease-out) forwards;
  pointer-events: auto;
}
.toast.out { animation: toastOut .25s var(--ease) forwards; }
.toast .t-ico {
  flex: 0 0 18px; width: 18px; height: 18px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--white);
}
.toast.ok { background: #14532d; }
.toast.ok .t-ico { background: var(--green); }
.toast.err { background: #7f1d1d; }
.toast.err .t-ico { background: var(--red); }
.toast.info { background: #1e3a8a; }
.toast.info .t-ico { background: var(--blue); }
@keyframes toastIn { to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(12px); } }
@media (prefers-reduced-motion: reduce) {
  .toast { animation-duration: .01ms; }
}

.f-status {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 500;
  animation: fadeUp .3s ease-out;
}
.f-status.ok {
  background: var(--ok-bg);
  color: var(--ok);
  border: 1px solid rgba(28, 122, 62, .3);
}
.f-status.err {
  background: var(--err-bg);
  color: var(--err);
  border: 1px solid rgba(179, 36, 36, .25);
}
.f-status.info {
  background: var(--info-bg);
  color: var(--info);
  border: 1px solid rgba(0, 47, 167, .2);
}

/* 深色页脚场景：提升状态文字对比度 */
.foot-form .f-status.ok {
  color: #6ee79b;
  background: rgba(35, 196, 93, .15);
  border-color: rgba(35, 196, 93, .4);
}
.foot-form .f-status.err {
  color: #ff9b9b;
  background: rgba(216, 58, 58, .15);
  border-color: rgba(216, 58, 58, .4);
}
.foot-form .f-status.info {
  color: #9cc3ff;
  background: rgba(29, 95, 176, .18);
  border-color: rgba(29, 95, 176, .45);
}

/* ---- 卡片 hover 光晕 ---- */
.card {
  position: relative;
  transition: transform .25s, box-shadow .25s;
}
.card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(35, 196, 93, .35), rgba(29, 95, 176, .15) 40%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card:hover { transform: translateY(-2px); box-shadow: 0 18px 44px rgba(0, 47, 167, .14), 0 0 0 1px rgba(35, 196, 93, .3); }

/* ---- 模块卡数字闪烁强调 ---- */
.m-card .mod-num {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---- 减少动效用户降级 ---- */
@media (prefers-reduced-motion: reduce) {
  html.ready .hero-kicker,
  html.ready .hero-slogan,
  html.ready .hero-ctas,
  html.ready .hero-data,
  .hero-title.split-ready .ch,
  .hero-title.split-ready .ch-space {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-progress { display: none; }
  .back-top { display: none; }
  .intro-curtain { display: none; }
}

/* ---- 移动端微调 ---- */
@media (max-width: 720px) {
  .back-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
  .intro-logo { font-size: 24px; }
}

/* ============================================================
   AI 合规雷达 · AI 增强（分析解读 / 真实性校验 / 评分细化）
   ============================================================ */

/* 评分卡：AI 细化徽标 */
.ai-score-badge{
  display:inline-block;font-size:11px;font-weight:600;line-height:1;
  padding:3px 8px;border-radius:var(--r-pill);margin-left:6px;vertical-align:middle;
  color:#7C3AED;background:rgba(124,58,237,.12);border:1px solid rgba(124,58,237,.25);
}

/* 法规卡：AI 顾问解读块 */
.rc-ai{margin-top:14px;padding:12px 14px;border-radius:10px;
  background:linear-gradient(180deg,#faf7ff,#f3ecff);border:1px solid #e3d7fb;}
.rc-ai-tag{display:inline-block;font-size:11px;font-weight:600;color:#7C3AED;
  background:var(--white);border:1px solid #e3d7fb;border-radius:6px;padding:2px 8px;margin-bottom:6px;}
.rc-ai p{margin:0;font-size:13.5px;line-height:1.7;color:#3b2f57;}

/* AI 校验 section 标题徽标 */
.ai-badge{background:#7C3AED !important;color:var(--white) !important;}
.ai-sec .rp-h2{color:#5b21b6;}

/* 校验结论卡 */
.av-card{border-radius:12px;padding:16px 18px;border:1px solid;}
.av-card .av-head{font-size:15px;margin-bottom:8px;}
.av-ok{border-color:#bfe9c9;background:#f1fbf3;}
.av-ok .av-head{color:#1c7a3e;}
.av-caution{border-color:#f6d98a;background:#fffaf0;}
.av-caution .av-head{color:#b45309;}
.av-review{border-color:#f3b4b4;background:#fdf3f3;}
.av-review .av-head{color:#b91c1c;}
.av-ok-text{margin:0;color:#1c7a3e;font-size:14px;}
.av-flags{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}
.av-flag{display:flex;gap:8px;align-items:flex-start;font-size:13.5px;line-height:1.6;
  padding:8px 12px;border-radius:var(--r-sm);}
.av-flag-info{background:#eef4fb;color:#1e3a5f;}
.av-flag-warn{background:#fff5e6;color:#8a5300;}
.av-flag-err{background:#fdecec;color:#9b1c1c;}

/* 报告页加载态 */
.rp-loading{padding:80px 0;text-align:center;color:var(--grey);font-size:15px;}

/* 雷达页免费摘要：AI 顾问提示 */
.ai-tip{display:flex;gap:8px;align-items:flex-start;margin-top:12px;
  padding:10px 12px;border-radius:10px;background:#f6f1ff;border:1px solid #e3d7fb;
  font-size:13px;line-height:1.6;color:#3b2f57;}
.ai-tip-tag{font-weight:600;color:#7C3AED;white-space:nowrap;}

/* ===== 核心结论卡（结论先行 · 强视觉） ===== */
/* ===== 核心结论卡（结论先行 · 强视觉 + 高对比） ===== */
/* 设计原则：浅色背景 + 深色文字 + 顶部彩色强调边，保证任何浏览器/对比度设置下都清晰可读 */
.verdict{margin:22px 0;padding:22px 26px;border-radius:16px;color:#1c2538;
  background:var(--white);border:1px solid var(--line);
  border-top:5px solid var(--blue);
  box-shadow:0 10px 28px rgba(0,47,167,.08);overflow:hidden;position:relative;}
.verdict.band-red{border-top-color:#DC2626;background:linear-gradient(180deg,#fff7f6,var(--white));}
.verdict.band-amber{border-top-color:#D97706;background:linear-gradient(180deg,#fffaf2,var(--white));}
.verdict.band-blue{border-top-color:var(--blue);background:linear-gradient(180deg,#f4f8fd,var(--white));}
.verdict.band-green{border-top-color:#1c7a3e;background:linear-gradient(180deg,#f3faf5,var(--white));}
.verdict-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap;}
.v-tag{font-size:12px;font-weight:700;letter-spacing:.08em;padding:4px 10px;border-radius:var(--r-pill);background:var(--blue);color:var(--white);}
.verdict.band-red .v-tag{background:#DC2626;}
.verdict.band-amber .v-tag{background:#D97706;}
.verdict.band-green .v-tag{background:#1c7a3e;}
.v-level{font-size:13px;font-weight:600;color:#33415c;}
.verdict-text{font-size:16px;line-height:1.78;margin:0 0 16px;font-weight:500;color:#1c2538;}
/* AI 状态说明条：无论 AI 是否返回都常驻，展示 AI 驱动产品定位 */
.verdict-ai-line{margin:0 0 14px;padding:10px 14px;border-radius:var(--r-sm);font-size:12.5px;line-height:1.75;border:1px solid #dbe5f1;background:#f4f8fd;color:#33415c}
.v-ai-on{color:var(--blue);font-weight:600}
.v-ai-on::before{content:"●";color:#23C45D;margin-right:6px;font-size:14px}
.v-ai-off{color:#5b6b7a}
.v-ai-off::before{content:"○";color:#94a3b8;margin-right:6px;font-size:14px}
.verdict-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px;}
.verdict-stats .vs{background:#f4f8fd;border:1px solid #dbe5f1;border-radius:10px;padding:12px 14px;}
.verdict.band-red .vs{background:#fff2ef;border-color:#f7d2cc;}
.verdict.band-amber .vs{background:#fff5e6;border-color:#f7dba8;}
.verdict.band-green .vs{background:#eff8f1;border-color:#bfe5c8;}
.verdict-stats .vs b{display:block;font-size:20px;font-weight:700;line-height:1.2;margin-bottom:2px;color:var(--blue);}
.verdict.band-red .vs b{color:#DC2626;}
.verdict.band-amber .vs b{color:#D97706;}
.verdict.band-green .vs b{color:#1c7a3e;}
.verdict-stats .vs span{font-size:12px;color:#5b6b7a;font-weight:600;}
.verdict-stats .vs-deadline{font-size:14px!important;font-weight:600;line-height:1.3;}
.verdict-actions{background:#f6fbff;border:1px dashed #cfe0f5;border-radius:10px;padding:14px 16px;}
.va-head{font-size:14px;font-weight:700;margin-bottom:10px;color:var(--blue);display:flex;align-items:center;gap:8px;}
.va-head::before{content:"🎯";font-size:14px;}
.va-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}
.va-list li{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:#1c2538;line-height:1.7;}
.va-num{flex:0 0 22px;height:22px;background:var(--blue);color:var(--white);font-weight:700;font-size:12px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;margin-top:1px;}
.verdict.band-red .va-num{background:#DC2626;}
.verdict.band-amber .va-num{background:#D97706;}
.verdict.band-green .va-num{background:#1c7a3e;}
.verdict-advice{margin-top:12px;background:linear-gradient(180deg,#f9f7ff,var(--white));border:1px solid #ddd1f7;border-radius:10px;padding:14px 16px;}
.verdict-advice .va-head{color:#5b21b6;}
.verdict-advice .va-head::before{content:"💡";}
.va-advice-list{margin:6px 0 0;padding-left:20px;}
.va-advice-list li{font-size:13px;line-height:1.7;margin-bottom:6px;color:#1c2538;}

/* ===== 精准诊断卡（specificity 护城河） ===== */
.dx-card{margin:18px 0;padding:20px 22px;border-radius:16px;background:var(--white);
  border:1px solid var(--line);border-left:5px solid var(--blue);
  box-shadow:0 8px 22px rgba(0,47,167,.06);}
.dx-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px;}
.dx-fact{background:#f4f8fd;border:1px solid #dbe5f1;border-radius:10px;padding:10px 12px;}
.dx-fact .dx-k{display:block;font-size:11px;font-weight:600;color:#5b6b7a;margin-bottom:3px;letter-spacing:.04em;}
.dx-fact .dx-v{display:block;font-size:14px;font-weight:700;color:var(--blue);line-height:1.3;}
.dx-scope{margin-bottom:12px;}
.dx-scope-h{display:block;font-size:13px;font-weight:700;color:#33415c;margin-bottom:8px;}
.dx-chips{display:flex;flex-wrap:wrap;gap:8px;}
.dx-chip{font-size:12.5px;font-weight:600;padding:6px 12px;border-radius:var(--r-pill);border:1px solid;}
.dx-chip.on{background:#eef4fb;color:var(--blue);border-color:#cfe0f5;}
.dx-chip.off{background:#f1f5f9;color:#94a3b8;border-color:#e2e8f0;}
.dx-deadline{margin:0 0 12px;font-size:14px;line-height:1.6;color:#1c2538;
  background:#fff7f6;border:1px solid #f7d2cc;border-radius:10px;padding:10px 14px;}
.dx-expose{background:#f6fbff;border:1px dashed #cfe0f5;border-radius:10px;padding:12px 14px;}
.dx-expose-h{font-size:13px;font-weight:700;color:var(--blue);margin-bottom:8px;}
.dx-expose-li{margin:0 0 6px;font-size:13px;line-height:1.65;color:#1c2538;}
.dx-expose-li:last-child{margin-bottom:0;}

/* 法规卡：AI 多段解读 */
.rc-ai .rc-ai-int{margin:0 0 10px;font-size:13.5px;line-height:1.7;color:#3b2f57;}
.rc-ai .rc-ai-block{margin-top:8px;}
.rc-ai .rc-ai-bk{display:inline-block;font-size:12px;font-weight:600;color:#5b21b6;margin-bottom:3px;}
.rc-ai .rc-ai-ul{margin:0;padding-left:18px;}
.rc-ai .rc-ai-ul li{font-size:13px;line-height:1.6;color:#3b2f57;margin-bottom:2px;}
.rc-ai .rc-ai-time{margin-top:8px;font-size:12.5px;color:#6b21a8;background:var(--white);
  border-radius:6px;padding:6px 10px;border:1px dashed #d6c2f5;}

/* AI 校验 summary */
.av-summary{margin:0 0 10px;font-size:13.5px;line-height:1.65;color:#334155;}

@media (max-width:680px){
  .verdict{padding:18px 16px;}
  .verdict-text{font-size:15px;}
  .verdict-stats{grid-template-columns:1fr;gap:8px;}
  .verdict-stats .vs{display:flex;justify-content:space-between;align-items:baseline;gap:8px;}
  .verdict-stats .vs b{margin-bottom:0;}
  .dx-facts{grid-template-columns:1fr 1fr;}
  .dx-fact .dx-v{font-size:13px;}
}