/* ==========================================================================
   2026 亦智杯 · 亦庄具身智能开发者挑战赛 — 设计系统 v3（浅色 · 产业科技风）
   机器人圈 RobotQuan · 具身流动（北京）科技有限公司
   调性：专业 / 科技 / 清晰 / 有产业感（不政务、不过度赛博）
   主色：白底 + 科技蓝；强调按钮：橙色。纯手写 CSS，无框架 / 无 CDN 依赖。
   H5(移动) 与 PC 双端兼容。
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* surfaces */
  --bg: #ffffff;
  --bg-soft: #f3f7fd;        /* 交替区块底 */
  --bg-tint: #eaf3fc;        /* (未直接用) */
  --panel: #ffffff;
  --line: #e7edf7;
  --line-strong: #d6e0ef;

  /* text */
  --text: #0e1b33;
  --text-dim: #45557a;
  --muted: #5f6d88;

  /* brand */
  --blue: #1f63ff;           /* 科技蓝（主色） */
  --blue-deep: #1346cc;
  --blue-soft: #e9f0ff;
  --cyan: #12b5e8;           /* 视觉/数据青 */
  --cyan-soft: #e3f6fd;
  --orange: #ff6a1a;         /* 亮橙：用于填充/图标/圆点（非文字） */
  --orange-deep: #d2440a;    /* 深橙：用于文字与 CTA，保证白字/深字对比 ≥4.5:1 */
  --orange-soft: #fff1e8;
  --green: #12b886;
  --green-soft: #e4f8f1;

  /* gradients */
  --grad-blue: linear-gradient(120deg, #2f6bff 0%, #12b5e8 100%);
  --grad-text: linear-gradient(100deg, #1f63ff 0%, #0e88b4 100%);
  --grad-cta: linear-gradient(120deg, #d2440a 0%, #c23d05 100%);
  --grad-soft: linear-gradient(135deg, rgba(31, 99, 255, 0.08), rgba(18, 181, 232, 0.08));

  /* fonts */
  --font-cjk: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei",
    "微软雅黑", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei", system-ui, sans-serif;
  --font-display: "Space Grotesk", "DIN Alternate", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Space Grotesk", ui-monospace, "SF Mono", Consolas, monospace;

  /* radii */
  --r-sm: 9px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* shadows (light theme = soft blue-gray) */
  --shadow-sm: 0 2px 10px rgba(18, 40, 92, 0.06);
  --shadow-card: 0 20px 46px -24px rgba(20, 48, 104, 0.3);
  --shadow-cta: 0 14px 28px -10px rgba(255, 106, 26, 0.5);
  --shadow-blue: 0 16px 34px -14px rgba(31, 99, 255, 0.4);

  /* layout */
  --container: 1180px;
  --nav-h: 70px;

  /* z-index */
  --z-bg: 0; --z-base: 1; --z-sticky: 45; --z-nav: 50; --z-modal: 80; --z-toast: 95;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 14px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-cjk);
  background: var(--bg);
  color: var(--text);
  color-scheme: light;
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
@media (forced-colors: active) { :focus-visible { outline: 2px solid CanvasText; } }
::selection { background: rgba(31, 99, 255, 0.18); }

/* ---------- Background decoration（浅色蓝图网格 + 柔光）---------- */
.bg-deco { position: fixed; inset: 0; z-index: var(--z-bg); pointer-events: none; overflow: hidden; }
.bg-deco::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(50% 40% at 8% 2%, rgba(31, 99, 255, 0.1), transparent 60%),
    radial-gradient(46% 38% at 96% 4%, rgba(18, 181, 232, 0.1), transparent 60%),
    radial-gradient(40% 34% at 88% 64%, rgba(255, 106, 26, 0.06), transparent 60%);
}
.bg-deco .grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(31, 99, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 99, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse 90% 55% at 50% 0%, #000 30%, transparent 80%);
  mask-image: radial-gradient(ellipse 90% 55% at 50% 0%, #000 30%, transparent 80%);
}
.bg-deco .glow { display: none; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { position: relative; padding: 92px 0; z-index: var(--z-base); }
.section--tight { padding: 60px 0; }
.section--alt { background: var(--bg-soft); }
.section-head { max-width: 760px; margin: 0 0 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-size: 12.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--blue);
  padding: 6px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--blue-soft); background: var(--blue-soft);
  margin-bottom: 18px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); }

.section-title { font-size: clamp(26px, 3.8vw, 42px); line-height: 1.16; letter-spacing: -0.01em; color: var(--text); }
.section-lead { margin-top: 14px; color: var(--text-dim); font-size: clamp(15px, 1.5vw, 18px); max-width: 680px; }
.center .section-lead { margin-left: auto; margin-right: auto; }

.gradient-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.orange-text { color: var(--orange-deep); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-weight: 600; font-size: 15px; padding: 13px 24px;
  border-radius: var(--r-pill); border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap; min-height: 46px;
}
.btn svg { width: 18px; height: 18px; }
/* 主 CTA = 橙色强调 */
.btn-primary { color: #fff; background: var(--grad-cta); box-shadow: var(--shadow-cta); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px -10px rgba(255, 106, 26, 0.6); }
/* 蓝色实心 */
.btn-blue { color: #fff; background: var(--blue); box-shadow: var(--shadow-blue); }
.btn-blue:hover { transform: translateY(-2px); background: var(--blue-deep); }
/* 描边/白底 */
.btn-ghost { color: var(--text); background: #fff; border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-outline { color: var(--blue); background: var(--blue-soft); border-color: transparent; }
.btn-outline:hover { background: #dde9ff; }
.btn-lg { padding: 16px 32px; font-size: 16.5px; min-height: 56px; }
.btn-sm { padding: 9px 18px; font-size: 13.5px; min-height: 40px; gap: 7px; }
.btn-sm svg { width: 16px; height: 16px; }
.btn-block { width: 100%; }

/* ---------- Top-anchored header bar（贴顶 · 正规赛事感）---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}
.nav::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad-blue); }
.nav.scrolled { background: rgba(255, 255, 255, 0.97); border-bottom-color: var(--line-strong); box-shadow: 0 6px 22px -14px rgba(20, 48, 104, 0.3); }
.nav .container { display: flex; align-items: center; justify-content: space-between; gap: 18px; height: 100%; }

.brand { display: flex; align-items: center; gap: 11px; }
.brand-logo { height: 38px; width: auto; display: block; }
.footer .brand-logo { height: 42px; }
@media (max-width: 420px) { .brand-logo { height: 32px; } }
.brand-mark { width: 38px; height: 38px; border-radius: 11px; background: var(--grad-blue); display: grid; place-items: center; box-shadow: var(--shadow-blue); flex: none; }
.brand-mark svg { width: 22px; height: 22px; color: #fff; }
.brand-text { line-height: 1.15; }
.brand-text b { font-size: 15.5px; font-weight: 700; letter-spacing: 0.01em; display: block; color: var(--text); }
.brand-text span { display: block; font-size: 10.5px; color: var(--muted); letter-spacing: 0.16em; font-family: var(--font-display); }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a { font-size: 14.5px; color: var(--text-dim); padding: 9px 13px; border-radius: var(--r-pill); transition: color 0.2s ease, background 0.2s ease; }
.nav-links a:hover { color: var(--blue); background: var(--blue-soft); }
.nav-right { display: flex; align-items: center; gap: 10px; }

.nav-toggle { display: none; width: 42px; height: 42px; border-radius: var(--r-md); border: 1px solid var(--line-strong); background: #fff; color: var(--text); align-items: center; justify-content: center; }
.nav-toggle svg { width: 22px; height: 22px; }

.nav-drawer {
  position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: var(--z-nav);
  background: #fff; border-bottom: 1px solid var(--line-strong); box-shadow: 0 14px 30px -16px rgba(20, 48, 104, 0.3);
  transform: translateY(-130%); transition: transform 0.3s ease; padding: 8px 24px 18px;
}
.nav-drawer.open { transform: translateY(0); }
.nav-drawer a { display: block; padding: 14px 6px; font-size: 16px; font-weight: 500; color: var(--text); border-bottom: 1px solid var(--line); }
.nav-drawer a:last-of-type { border-bottom: none; }

/* 点击空白收起的半透明遮罩（仅移动端）*/
.nav-backdrop { position: fixed; inset: var(--nav-h) 0 0 0; background: rgba(14, 27, 51, 0.4); z-index: 48; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px); }
.nav-backdrop.show { opacity: 1; pointer-events: auto; }
@media (min-width: 769px) { .nav-backdrop { display: none; } }

/* 移动端菜单专属「立即报名」按钮（与 PC 分开设计）*/
.nav-drawer .drawer-cta {
  margin-top: 16px; border-bottom: none;
  display: flex; align-items: center; justify-content: center; gap: 9px;
  width: 100%; padding: 15px 18px;
  border-radius: 14px;
  font-size: 16px; font-weight: 700; letter-spacing: 0.04em; color: #fff;
  background: linear-gradient(118deg, #ff8a2b 0%, #ff6a1a 46%, #f0530a 100%);
  box-shadow: 0 14px 26px -10px rgba(255, 106, 26, 0.6);
  text-shadow: 0 1px 2px rgba(150, 50, 0, 0.32);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.nav-drawer .drawer-cta svg { width: 18px; height: 18px; }
.nav-drawer .drawer-cta:active { transform: translateY(1px); box-shadow: 0 8px 18px -10px rgba(255, 106, 26, 0.6); }

/* ---------- Live badge（开放报名中）---------- */
.live-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px 7px 12px; border-radius: var(--r-pill);
  background: var(--orange-soft); border: 1px solid #ffd8bf; color: var(--orange-deep);
  font-size: 14px; font-weight: 600;
}
.live-badge .ring { position: relative; width: 9px; height: 9px; }
.live-badge .ring i { position: absolute; inset: 0; border-radius: 50%; background: var(--orange); }
.live-badge .ring::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--orange); opacity: 0.5; animation: ping 1.8s ease-out infinite; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: calc(var(--nav-h) + 54px) 0 78px; z-index: var(--z-base); }
.hero-grid { display: grid; grid-template-columns: 1.04fr 0.96fr; gap: 54px; align-items: center; }
.hero h1 { font-size: clamp(32px, 5.4vw, 62px); line-height: 1.08; letter-spacing: -0.015em; margin: 22px 0 18px; color: var(--text); }
.hero h1 .accent { color: var(--blue); }
.hero-slogan { font-size: clamp(17px, 2vw, 23px); font-weight: 600; color: var(--text); margin-bottom: 14px; }
.hero-sub { font-size: clamp(15px, 1.6vw, 17px); color: var(--text-dim); max-width: 540px; margin-bottom: 24px; }

.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.hero-tags span { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--text-dim); padding: 8px 14px; border-radius: var(--r-pill); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); }
.hero-tags span i { width: 6px; height: 6px; border-radius: 2px; background: var(--cyan); transform: rotate(45deg); flex: none; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-note { font-size: 13px; color: var(--muted); margin-top: 16px; display: flex; align-items: center; gap: 8px; }
.hero-note svg { width: 16px; height: 16px; color: var(--green); flex: none; }

/* hero visual — 机器视觉识别面板 */
.vision { position: relative; }
.vision-card {
  position: relative; border-radius: var(--r-xl); border: 1px solid var(--line);
  background: #fff; box-shadow: var(--shadow-card); padding: 18px; overflow: hidden;
}
.vision-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.vision-head .vt { display: flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; color: var(--text); }
.vision-head .vt .ic { width: 28px; height: 28px; border-radius: 8px; background: var(--grad-blue); display: grid; place-items: center; }
.vision-head .vt .ic svg { width: 16px; height: 16px; color: #fff; }
.vision-head .live { font-family: var(--font-mono); font-size: 11px; color: #0a8f66; display: flex; align-items: center; gap: 6px; }
.vision-head .live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(18,184,134,.5); animation: ping 1.8s infinite; }
.vision-stage {
  position: relative; height: 232px; border-radius: var(--r-md);
  background:
    linear-gradient(rgba(31,99,255,.05) 1px, transparent 1px) 0 0 / 22px 22px,
    linear-gradient(90deg, rgba(31,99,255,.05) 1px, transparent 1px) 0 0 / 22px 22px,
    linear-gradient(160deg, #f6f9ff, #eef4ff);
  border: 1px solid var(--line); overflow: hidden;
}
/* detection boxes */
.det { position: absolute; border: 1.6px solid var(--blue); border-radius: 7px; background: rgba(31,99,255,.05); }
.det.cyan { border-color: var(--cyan); background: rgba(18,181,232,.06); }
.det.orange { border-color: var(--orange); background: rgba(255,106,26,.06); }
.det .tag { position: absolute; top: -11px; left: 8px; font-family: var(--font-display); font-size: 10px; font-weight: 600; color: #fff; background: var(--blue); padding: 2px 8px; border-radius: 5px; white-space: nowrap; }
.det.cyan .tag { background: #0a86ad; }
.det.orange .tag { background: var(--orange-deep); }
.det .corner { position: absolute; width: 9px; height: 9px; border: 2px solid currentColor; }
.det .obj { position: absolute; inset: 18% ; border-radius: 6px; }
.vision-foot { display: flex; gap: 10px; margin-top: 12px; }
.vmeter { flex: 1; padding: 10px 12px; border-radius: var(--r-sm); border: 1px solid var(--line); background: #fbfdff; }
.vmeter b { display: block; font-size: 12px; color: var(--text); }
.vmeter .bar { margin-top: 7px; height: 5px; border-radius: 5px; background: #eef2f9; overflow: hidden; }
.vmeter .bar i { display: block; height: 100%; border-radius: 5px; background: var(--grad-blue); }
.vmeter.o .bar i { background: var(--grad-cta); }
/* spec chips below the vision card（静态，避免浮层覆盖卡片内容）*/
.vision-specs { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 16px; }
.vision-specs span { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 600; color: var(--text); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); border-radius: var(--r-pill); padding: 8px 14px; }
.vision-specs span svg { width: 15px; height: 15px; color: var(--blue); flex: none; }

/* ---------- Generic cards ---------- */
.card { border-radius: var(--r-lg); border: 1px solid var(--line); background: #fff; padding: 26px; box-shadow: var(--shadow-sm); transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease; }
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-card); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }

/* highlight feature cards（赛事亮点：真实任务/设备/开发/展示） */
.feature .ic { width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px; background: var(--grad-soft); border: 1px solid var(--blue-soft); color: var(--blue); }
.feature .ic svg { width: 25px; height: 25px; }
.feature .kw { font-size: 13px; font-weight: 700; color: var(--orange-deep); letter-spacing: 0.04em; margin-bottom: 4px; }
.feature h3 { font-size: 18.5px; margin-bottom: 10px; color: var(--text); }
.feature p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- Audience cards ---------- */
.aud-card { position: relative; }
.aud-card .ic { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 16px; }
.aud-card .ic svg { width: 26px; height: 26px; }
.aud-card.c1 .ic { background: var(--blue-soft); color: var(--blue); }
.aud-card.c2 .ic { background: var(--cyan-soft); color: var(--cyan); }
.aud-card.c3 .ic { background: var(--orange-soft); color: var(--orange); }
.aud-card h3 { font-size: 19px; margin-bottom: 8px; }
.aud-card p { color: var(--text-dim); font-size: 14.5px; }

.info-strip {
  margin-top: 22px; display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 16px 22px; border-radius: var(--r-lg);
  background: var(--blue-soft); border: 1px dashed #b9cdfb; color: var(--blue-deep);
  font-size: 15.5px; font-weight: 600; text-align: center; flex-wrap: wrap;
}
.info-strip svg { width: 20px; height: 20px; color: var(--blue); flex: none; }
.info-strip b { color: var(--orange-deep); }

/* ---------- Task modules ---------- */
.task { position: relative; display: flex; flex-direction: column; }
.task .thead { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.task .tnum { width: 46px; height: 46px; border-radius: 13px; background: var(--grad-blue); color: #fff; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 18px; flex: none; box-shadow: var(--shadow-blue); }
.task .pill { font-size: 12px; font-weight: 700; padding: 4px 11px; border-radius: var(--r-pill); }
.pill-must { color: var(--blue); background: var(--blue-soft); }
.pill-bonus { color: var(--orange-deep); background: var(--orange-soft); }
.task h3 { font-size: 18px; margin-bottom: 8px; }
.task p { color: var(--text-dim); font-size: 14.5px; flex: 1; }
.scene-note { margin-top: 24px; display: flex; gap: 12px; align-items: flex-start; padding: 18px 20px; border-radius: var(--r-lg); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); }
.scene-note svg { width: 20px; height: 20px; color: var(--cyan); flex: none; margin-top: 2px; }
.scene-note b { color: var(--text); }
.scene-note .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.scene-note .tags span { font-size: 12.5px; color: var(--text-dim); padding: 4px 11px; border-radius: var(--r-pill); background: var(--bg-soft); border: 1px solid var(--line); }

/* ---------- Timeline（赛事周期，日期为视觉重点）---------- */
.timeline { position: relative; max-width: 960px; margin: 0 auto; }
.timeline::before { content: ""; position: absolute; left: 180px; top: 12px; bottom: 12px; width: 2px; background: linear-gradient(var(--blue), var(--cyan), var(--orange)); }
.tl-item { position: relative; display: grid; grid-template-columns: 170px 1fr; gap: 42px; padding-bottom: 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-date { text-align: right; padding-right: 18px; }
.tl-date .d { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--blue); line-height: 1.2; letter-spacing: -0.01em; white-space: nowrap; }
.tl-item.is-final .tl-date .d { color: var(--orange-deep); }
.tl-date .dur { display: inline-block; margin-top: 9px; font-size: 12px; font-weight: 600; color: var(--text-dim); background: var(--bg-soft); border: 1px solid var(--line); padding: 3px 10px; border-radius: var(--r-pill); }
.tl-node { position: absolute; left: 173px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--blue); box-shadow: 0 0 0 4px var(--blue-soft); }
.tl-item.is-final .tl-node { border-color: var(--orange); box-shadow: 0 0 0 4px var(--orange-soft); }
.tl-body { padding-left: 10px; }
.tl-body .stage { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; letter-spacing: 0.04em; color: var(--blue); background: var(--blue-soft); padding: 4px 11px; border-radius: var(--r-pill); margin-bottom: 9px; }
.tl-item.is-final .tl-body .stage { color: var(--orange-deep); background: var(--orange-soft); }
.tl-body h3 { font-size: 17px; margin-bottom: 6px; }
.tl-body p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- Resources ---------- */
.res-item { display: flex; gap: 16px; align-items: flex-start; padding: 22px; border-radius: var(--r-lg); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); transition: transform 0.2s ease, box-shadow 0.2s ease; }
.res-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.res-item .ic { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--blue-soft); color: var(--blue); flex: none; }
.res-item .ic svg { width: 24px; height: 24px; }
.res-item h3 { font-size: 17px; margin-bottom: 6px; }
.res-item p { color: var(--text-dim); font-size: 14px; }

/* ---------- Registration (QR) ---------- */
.reg-card { position: relative; overflow: hidden; border-radius: var(--r-xl); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-card); padding: 44px; }
.reg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.reg-info .meta { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 22px; }
.reg-info .meta .m { display: flex; align-items: center; gap: 9px; padding: 10px 15px; border-radius: var(--r-md); background: var(--bg-soft); border: 1px solid var(--line); }
.reg-info .meta .m svg { width: 18px; height: 18px; color: var(--blue); }
.reg-info .meta .m .k { font-size: 11.5px; color: var(--muted); }
.reg-info .meta .m .v { font-size: 14.5px; font-weight: 600; color: var(--text); }
.reg-info .tip { font-size: 13.5px; color: var(--text-dim); display: flex; gap: 9px; align-items: flex-start; }
.reg-info .tip svg { width: 17px; height: 17px; color: var(--cyan); flex: none; margin-top: 2px; }
.qr-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.qr-card { border: 1px solid var(--line); border-radius: var(--r-lg); padding: 18px; text-align: center; background: var(--bg-soft); }
.qr-card .qrbox { width: 132px; height: 132px; margin: 0 auto 12px; border-radius: var(--r-md); background: #fff; border: 1px solid var(--line-strong); display: grid; place-items: center; color: var(--muted); position: relative; }
.qr-card .qrbox svg { width: 44px; height: 44px; }
.qr-card .qrbox .ph { position: absolute; bottom: 8px; left: 0; right: 0; font-size: 10.5px; color: var(--muted); }
.qr-card b { font-size: 14.5px; display: block; }
.qr-card span { font-size: 12.5px; color: var(--muted); display: block; margin-top: 3px; }
.qr-card .label-tag { display: inline-block; margin-bottom: 12px; font-size: 11.5px; font-weight: 700; padding: 3px 11px; border-radius: var(--r-pill); }
.qr-card.report .label-tag { color: var(--orange-deep); background: var(--orange-soft); }
.qr-card.feishu .label-tag { color: var(--blue); background: var(--blue-soft); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 50px 0 30px; background: var(--bg-soft); position: relative; z-index: var(--z-base); }
.footer-top { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
.footer .brand { margin-bottom: 14px; }
.footer-org p { color: var(--muted); font-size: 14px; max-width: 360px; }
.footer-col h4 { font-size: 14px; color: var(--text); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 14px; padding: 6px 0; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 13px; }
.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--blue); }

/* placeholder note */
.tbd { font-style: normal; color: var(--orange-deep); font-size: 0.92em; border-bottom: 1px dashed rgba(240, 83, 10, 0.5); cursor: help; }

/* ---------- Mobile sticky CTA ---------- */
.mobile-cta { display: none; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.07s; } .reveal.d2 { transition-delay: 0.14s; } .reveal.d3 { transition-delay: 0.21s; } .reveal.d4 { transition-delay: 0.28s; }
@keyframes ping { 0% { transform: scale(1); opacity: 0.6; } 70%, 100% { transform: scale(2.2); opacity: 0; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
.floaty { animation: float 6s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  .floaty, .live-badge .ring::after, .vision-head .live::before { animation: none !important; }
  .btn:hover, .card:hover, .res-item:hover { transform: none; }
}

/* ==========================================================================
   Forms (register.html · 浅色)
   ========================================================================== */
.form-wrap { display: grid; grid-template-columns: 1fr 330px; gap: 32px; align-items: start; }
.form-col { min-width: 0; }
.form-card { border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; padding: 30px; box-shadow: var(--shadow-sm); }
.form-section { padding-bottom: 26px; margin-bottom: 26px; border-bottom: 1px solid var(--line); }
.form-section:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.fs-head { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.fs-head .n { width: 30px; height: 30px; border-radius: 9px; background: var(--grad-blue); color: #fff; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 14px; flex: none; }
.fs-head h3 { font-size: 18px; }
.field { margin-bottom: 18px; }
.field > label { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 9px; }
.field .req { color: var(--orange); margin-left: 4px; }
.field .hint { font-size: 12.5px; color: var(--muted); font-weight: 400; margin-left: 8px; }
.input, .select, .textarea { width: 100%; background: #fff; border: 1px solid var(--line-strong); border-radius: var(--r-md); color: var(--text); font-family: inherit; font-size: 15px; padding: 13px 15px; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.textarea { min-height: 110px; resize: vertical; }
.input::placeholder, .textarea::placeholder { color: #9aa7bf; }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 99, 255, 0.14); }
.select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238593ad' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 42px; }
.select option, .select optgroup { background-color: #fff; color: var(--text); }
.field.invalid .input, .field.invalid .select, .field.invalid .textarea { border-color: #ef4444; box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.14); }
.err-msg { display: none; color: #dc2626; font-size: 12.5px; margin-top: 7px; }
.field.invalid .err-msg, [data-consent-box].invalid .err-msg { display: block; }

.opt-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.opt { display: flex; align-items: flex-start; gap: 11px; padding: 13px 15px; border-radius: var(--r-md); border: 1px solid var(--line-strong); background: #fff; cursor: pointer; transition: all 0.18s ease; font-size: 14px; line-height: 1.4; }
.opt:hover { border-color: var(--blue); background: var(--blue-soft); }
.opt input { margin-top: 2px; accent-color: var(--blue); width: 17px; height: 17px; flex: none; }
.opt.checked { border-color: var(--blue); background: var(--blue-soft); }
.opt small { display: block; color: var(--muted); font-size: 12px; }

.upload { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 26px; border: 1.5px dashed var(--line-strong); border-radius: var(--r-md); background: var(--bg-soft); text-align: center; cursor: pointer; transition: border-color 0.2s ease, background 0.2s ease; }
.upload:hover { border-color: var(--blue); background: var(--blue-soft); }
.upload svg { width: 28px; height: 28px; color: var(--blue); }
.upload b { font-size: 14.5px; }
.upload span { font-size: 12.5px; color: var(--muted); }

.consent { display: flex; gap: 11px; align-items: flex-start; margin-bottom: 14px; font-size: 14px; color: var(--text-dim); }
.consent input { margin-top: 3px; accent-color: var(--blue); width: 17px; height: 17px; flex: none; }
.consent a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }

.form-aside { position: sticky; top: calc(var(--nav-h) + 16px); display: grid; gap: 16px; }
.aside-card { border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; padding: 22px; box-shadow: var(--shadow-sm); }
.aside-card h4 { font-size: 15px; margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.aside-card h4 svg { width: 18px; height: 18px; color: var(--blue); flex: none; }
.aside-card h4 .pct { margin-left: auto; font-family: var(--font-display); color: var(--blue); font-size: 16px; }
.aside-steps { display: grid; gap: 14px; }
.aside-steps li { display: flex; gap: 12px; font-size: 13.5px; color: var(--text-dim); }
.aside-steps .s { width: 24px; height: 24px; border-radius: 7px; background: var(--blue-soft); color: var(--blue); display: grid; place-items: center; font-family: var(--font-display); font-size: 12px; flex: none; }
.aside-card .note { font-size: 13px; color: var(--muted); }

.progress-line { position: fixed; top: var(--nav-h); left: 0; right: 0; height: 3px; background: rgba(31, 99, 255, 0.1); z-index: var(--z-sticky); }
.progress-line i { display: block; height: 100%; width: 0; background: var(--grad-cta); transition: width 0.35s ease; }
.fp-bar { height: 7px; border-radius: 7px; background: #eef2f9; overflow: hidden; }
.fp-bar i { display: block; height: 100%; width: 0; background: var(--grad-cta); border-radius: 7px; transition: width 0.35s ease; }

.reg-success { display: none; border: 1px solid var(--green); border-radius: var(--r-lg); background: var(--green-soft); padding: 30px; text-align: center; }
.reg-success.show { display: block; }
.reg-success .ok { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 18px; display: grid; place-items: center; background: var(--green); color: #fff; }
.reg-success .ok svg { width: 32px; height: 32px; }
.reg-success h3 { font-size: 22px; margin-bottom: 10px; }
.reg-success p { color: var(--text-dim); max-width: 440px; margin: 0 auto 22px; }
.reg-success .qr-row { display: flex; justify-content: center; gap: 24px; margin-bottom: 22px; }

.toast { position: fixed; bottom: 28px; left: 50%; transform: translate(-50%, 130px); z-index: var(--z-toast); background: #fff; border: 1px solid var(--green); border-radius: var(--r-md); padding: 15px 22px; display: flex; align-items: center; gap: 12px; box-shadow: var(--shadow-card); transition: transform 0.35s ease; max-width: 90vw; }
.toast.show { transform: translate(-50%, 0); }
.toast svg { width: 22px; height: 22px; color: var(--green); flex: none; }

/* QR small (footer/success) */
.qr { text-align: center; }
.qr .box { width: 92px; height: 92px; border-radius: var(--r-md); border: 1px solid var(--line-strong); background: #fff; display: grid; place-items: center; color: var(--muted); }
.qr .box svg { width: 30px; height: 30px; }
.qr span { display: block; font-size: 12px; color: var(--muted); margin-top: 8px; }

/* ==========================================================================
   PRD document page（浅色）
   ========================================================================== */
.doc-shell { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; padding-top: calc(var(--nav-h) + 40px); }
.doc-toc { position: sticky; top: calc(var(--nav-h) + 24px); max-height: calc(100vh - var(--nav-h) - 48px); overflow-y: auto; border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; padding: 20px; box-shadow: var(--shadow-sm); }
.doc-toc h4 { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.doc-toc a { display: block; font-size: 13.5px; color: var(--text-dim); padding: 7px 12px; border-radius: var(--r-sm); border-left: 2px solid transparent; transition: all 0.18s ease; }
.doc-toc a:hover { color: var(--text); background: var(--bg-soft); }
.doc-toc a.active { color: var(--blue); border-left-color: var(--blue); background: var(--blue-soft); }
.doc { max-width: 860px; }
.doc-hero { border: 1px solid var(--line); border-radius: var(--r-xl); background: linear-gradient(150deg, var(--blue-soft), var(--cyan-soft)); padding: 38px; margin-bottom: 40px; }
.doc-hero h1 { font-size: clamp(26px, 4vw, 38px); margin-bottom: 14px; }
.doc-hero p { color: var(--text-dim); max-width: 640px; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 22px; }
.doc-meta div { font-size: 13.5px; }
.doc-meta .k { color: var(--muted); margin-right: 8px; }
.doc-meta .v { color: var(--text); font-weight: 600; }
.doc section { scroll-margin-top: calc(var(--nav-h) + 24px); margin-bottom: 44px; }
.doc h2 { font-size: 23px; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); display: flex; align-items: baseline; gap: 12px; }
.doc h2 .num { font-family: var(--font-display); color: var(--blue); font-size: 18px; }
.doc h3 { font-size: 18px; margin: 26px 0 12px; }
.doc p { color: var(--text-dim); margin-bottom: 14px; }
.doc code { font-family: var(--font-mono); font-size: 0.88em; background: var(--blue-soft); border: 1px solid var(--line); border-radius: 6px; padding: 2px 7px; color: var(--blue-deep); }
.doc ul.bullets { margin: 0 0 16px; display: grid; gap: 9px; }
.doc ul.bullets li { position: relative; padding-left: 22px; color: var(--text-dim); font-size: 15px; }
.doc ul.bullets li::before { content: ""; position: absolute; left: 4px; top: 11px; width: 7px; height: 7px; border-radius: 2px; background: var(--blue); transform: rotate(45deg); }
.doc ul.bullets li b { color: var(--text); }
.doc-table { width: 100%; border-collapse: collapse; margin: 8px 0 18px; font-size: 14px; border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; }
.doc-table thead th { background: var(--blue-soft); color: var(--text); text-align: left; padding: 12px 14px; font-weight: 600; font-size: 13.5px; border-bottom: 1px solid var(--line); }
.doc-table td { padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--text-dim); vertical-align: top; }
.doc-table tbody tr:last-child td { border-bottom: none; }
.doc-table tbody tr:hover { background: var(--bg-soft); }
.doc-table .p0 { color: #dc2626; font-weight: 600; }
.doc-table .p1 { color: var(--orange-deep); font-weight: 600; }
.doc-table .p2 { color: var(--green); font-weight: 600; }
.callout { border: 1px solid #ffd8bf; background: var(--orange-soft); border-radius: var(--r-md); padding: 16px 18px; margin: 18px 0; display: flex; gap: 12px; }
.callout svg { width: 20px; height: 20px; color: var(--orange-deep); flex: none; margin-top: 2px; }
.callout div { font-size: 14px; color: var(--text-dim); }
.callout b { color: var(--orange-deep); }
.swatch-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 6px 0 18px; }
.swatch { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; width: 120px; }
.swatch .chiparea { height: 56px; }
.swatch .meta { padding: 8px 10px; font-size: 11.5px; }
.swatch .meta b { display: block; font-size: 12.5px; }
.swatch .meta code { color: var(--muted); font-family: var(--font-mono); background: none; border: none; padding: 0; }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 6px 0 18px; }
.kpi { border: 1px solid var(--line); border-radius: var(--r-md); padding: 16px; background: #fff; box-shadow: var(--shadow-sm); }
.kpi b { display: block; font-family: var(--font-display); font-size: 24px; color: var(--blue); }
.kpi span { font-size: 13px; color: var(--muted); }
.funnel { display: grid; gap: 8px; margin: 8px 0 18px; }
.funnel-step { display: flex; align-items: center; gap: 14px; padding: 14px 18px; border: 1px solid var(--line); border-radius: var(--r-md); background: #fff; }
.funnel-step .n { font-family: var(--font-display); color: var(--blue); font-size: 13px; width: 26px; flex: none; }
.funnel-step b { font-size: 15px; }
.funnel-step span { color: var(--muted); font-size: 13px; margin-left: auto; }

/* ---------- 首屏主视觉 KV 占位图 ---------- */
.kv-placeholder {
  position: relative; aspect-ratio: 4 / 3; border-radius: var(--r-xl);
  border: 1px solid var(--line); box-shadow: var(--shadow-card);
  background:
    linear-gradient(rgba(31, 99, 255, 0.05) 1px, transparent 1px) 0 0 / 26px 26px,
    linear-gradient(90deg, rgba(31, 99, 255, 0.05) 1px, transparent 1px) 0 0 / 26px 26px,
    linear-gradient(150deg, #f6f9ff, #eef4ff);
  display: grid; place-items: center; overflow: hidden;
}
.kv-placeholder::after { content: ""; position: absolute; inset: 16px; border: 1.5px dashed var(--line-strong); border-radius: var(--r-lg); pointer-events: none; }
.kv-placeholder .kv-inner { position: relative; text-align: center; display: grid; justify-items: center; gap: 6px; padding: 24px; }
.kv-placeholder .kv-ic { width: 66px; height: 66px; border-radius: 18px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--blue-soft); color: var(--blue); margin-bottom: 6px; }
.kv-placeholder .kv-ic svg { width: 32px; height: 32px; }
.kv-placeholder .kv-inner b { font-size: 17px; color: var(--text); }
.kv-placeholder .kv-sub { font-size: 13px; color: var(--muted); }

/* ---------- KV 冠名方 / 主办方（首屏右侧 KV 下方）---------- */
.kv-sponsors { margin-top: 18px; padding: 16px 18px; border-radius: var(--r-lg); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); }
.kv-sponsors .ks-label { display: inline-flex; align-items: center; gap: 7px; font-size: 11.5px; font-weight: 700; letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; }
.kv-sponsors .ks-label::before { content: ""; width: 14px; height: 2px; border-radius: 2px; background: var(--grad-blue); }
.kv-sponsors .ks-logos { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 11px; }
.kv-sponsors .ks-logos span { font-size: 13px; font-weight: 600; color: var(--text); padding: 7px 13px; border-radius: var(--r-pill); background: var(--bg-soft); border: 1px solid var(--line); }

/* ---------- 12 大真实场景网格（赛事任务）---------- */
.scene-block { margin-top: 28px; }
.scene-block .sb-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.scene-block .sb-head svg { width: 20px; height: 20px; color: var(--cyan); flex: none; }
.scene-block .sb-head b { font-size: 16px; color: var(--text); }
.scene-block .sb-head .cnt { font-size: 12px; font-weight: 700; color: var(--cyan); background: var(--cyan-soft); padding: 4px 11px; border-radius: var(--r-pill); }
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.scene-grid .sc { display: flex; align-items: center; gap: 10px; padding: 13px 15px; border-radius: var(--r-md); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); font-size: 13.5px; line-height: 1.35; color: var(--text-dim); transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease; }
.scene-grid .sc:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow-card); }
.scene-grid .sc .n { font-family: var(--font-display); font-size: 12px; font-weight: 700; color: var(--blue); background: var(--blue-soft); width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; flex: none; }
.scene-grid .sc.more { border-style: dashed; color: var(--muted); background: var(--bg-soft); }
.scene-grid .sc.more .n { color: var(--muted); background: #e7edf7; }

/* ---------- Awards（赛事奖金与激励）---------- */
.award-hero { position: relative; overflow: hidden; border-radius: var(--r-xl); border: 1px solid #ffd8bf; padding: 28px 32px; background: linear-gradient(120deg, #fff6ef 0%, #ffffff 60%); display: flex; align-items: center; gap: 28px; flex-wrap: wrap; box-shadow: var(--shadow-card); }
.award-hero::before { content: ""; position: absolute; right: -40px; top: -40px; width: 220px; height: 220px; border-radius: 50%; background: radial-gradient(circle, rgba(255, 106, 26, 0.12), transparent 70%); pointer-events: none; }
.award-hero .crown { width: 60px; height: 60px; border-radius: 16px; background: var(--grad-cta); display: grid; place-items: center; color: #fff; flex: none; box-shadow: var(--shadow-cta); }
.award-hero .crown svg { width: 30px; height: 30px; }
.award-hero .ah-main { flex: 1; min-width: 240px; }
.award-hero .tagline { font-size: 12.5px; font-weight: 700; color: var(--orange-deep); letter-spacing: 0.04em; margin-bottom: 7px; }
.award-hero h3 { font-size: 21px; margin-bottom: 9px; color: var(--text); }
.award-hero p { color: var(--text-dim); font-size: 14.5px; max-width: 520px; }
.award-hero .pool { position: relative; text-align: center; flex: none; padding-left: 28px; border-left: 1px dashed #ffd0b3; }
.award-hero .pool .amt { font-family: var(--font-display); font-size: 42px; font-weight: 700; color: var(--orange-deep); line-height: 1; letter-spacing: -0.01em; }
.award-hero .pool .amt small { font-size: 20px; margin-right: 2px; }
.award-hero .pool .lbl { font-size: 12.5px; color: var(--muted); margin-top: 8px; }

.awards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 18px; }
.award-card { position: relative; border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; padding: 22px; box-shadow: var(--shadow-sm); transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease; }
.award-card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-card); }
.award-card .medal { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 14px; font-size: 19px; font-weight: 700; color: #fff; }
.award-card .medal svg { width: 24px; height: 24px; }
.award-card.gold .medal { background: linear-gradient(135deg, #ffd66b, #f0a500); }
.award-card.silver .medal { background: linear-gradient(135deg, #d3dbe8, #9aa7bf); }
.award-card.bronze .medal { background: linear-gradient(135deg, #e8ad7d, #c5783f); }
.award-card.special .medal { background: var(--grad-blue); }
.award-card .rank { font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
.award-card h4 { font-size: 17px; margin-bottom: 12px; color: var(--text); }
.award-card .amt { font-family: var(--font-display); font-size: 28px; font-weight: 700; color: var(--text); line-height: 1; letter-spacing: -0.01em; }
.award-card .amt small { font-size: 15px; color: var(--text-dim); margin-right: 1px; }
.award-card.gold .amt, .award-card.special .amt { color: var(--orange-deep); }
.award-card .desc { font-size: 12.5px; color: var(--muted); margin-top: 9px; }

/* ==========================================================================
   Responsive — H5 / PC 双端
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .vision { max-width: 520px; }
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .awards-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .reg-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .doc-shell { grid-template-columns: 1fr; }
  .doc-toc { display: none; }
  .form-wrap { grid-template-columns: 1fr; }
  .form-aside { position: static; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .award-hero { padding: 24px 22px; gap: 20px; }
  .award-hero .pool { width: 100%; padding-left: 0; padding-top: 18px; border-left: none; border-top: 1px dashed #ffd0b3; text-align: left; }
  .award-hero .pool .amt { font-size: 36px; }
  .footer-top { grid-template-columns: 1fr; }
  .reg-card { padding: 28px 20px; }
  .qr-cards { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 26px); }
  .hero-cta { width: 100%; }
  .hero-cta .btn { flex: 1; }
  .vision-stage { height: 200px; }

  /* timeline → 紧凑：日期在上（突出）、内容在下 */
  .timeline::before { left: 7px; }
  .tl-item { grid-template-columns: 1fr; gap: 9px; padding-left: 30px; padding-bottom: 22px; }
  .tl-date { text-align: left; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
  .tl-date .d { font-size: 18px; }
  .tl-date .dur { margin-top: 0; }
  .tl-node { left: 0; top: 5px; }
  .tl-body { padding-left: 0; }

  /* 移动端底部常驻 CTA */
  .mobile-cta {
    display: flex; align-items: center; gap: 12px;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: var(--z-sticky);
    padding: 8px 14px calc(8px + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
    border-top: 1px solid var(--line-strong); box-shadow: 0 -6px 24px -12px rgba(20,48,104,.2);
  }
  .mc-bar { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: rgba(31,99,255,.1); }
  .mc-bar i { display: block; height: 100%; width: 0; background: var(--grad-cta); transition: width 0.35s ease; }
  .mobile-cta .mc-info { line-height: 1.2; min-width: 0; }
  .mobile-cta .mc-info span { font-size: 11px; color: var(--muted); display: block; }
  .mobile-cta .mc-info b { font-size: 13px; color: var(--text); }
  .mobile-cta .btn { margin-left: auto; }
  body.has-mobile-cta { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  .reg-success .qr-row { gap: 16px; }
  .doc-table { display: block; overflow-x: auto; }
}

@media (max-width: 420px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 30px; }
  .awards-grid { grid-template-columns: 1fr; }
  .qr-cards { grid-template-columns: 1fr; }
  .brand-text b { font-size: 14px; }
  .reg-card { padding: 24px 18px; }
}