/* ════════════════════════════════════════════════════════════════
   翼灵物联网工作室 · Liquid Glass Edition
   苹果液态玻璃风格：流动光斑 × 磨砂玻璃 × 高光描边
   ════════════════════════════════════════════════════════════════ */

/* ── 1. 基础与设计令牌 ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --ink: #101828;
  --ink-2: #475467;
  --ink-3: #98a2b3;

  /* 液态玻璃配方（苹果 Liquid Glass 风格） */
  --glass-hi: rgba(255, 255, 255, .72);
  --glass-lo: rgba(255, 255, 255, .34);
  --glass-stroke: rgba(255, 255, 255, .9);
  --glass-shadow: 0 28px 70px -18px rgba(23, 40, 99, .26),
                  0 4px 14px -4px rgba(23, 40, 99, .08);
  /* 顶部镜面高光层：模拟玻璃表面的光折射 */
  --glass-sheen: linear-gradient(160deg, rgba(255, 255, 255, .95) 0%, rgba(255, 255, 255, 0) 38%);

  --radius: 28px;
  --radius-sm: 18px;

  --font: "Outfit", -apple-system, "SF Pro Display", "PingFang SC",
          "HarmonyOS Sans SC", "MiSans", "Source Han Sans SC", "Microsoft YaHei", sans-serif;

  --container: 1140px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

::selection { background: rgba(56, 189, 248, .3); }

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

section { scroll-margin-top: 104px; }

/* ── 2. 背景场景：流动光斑 ────────────────────────────────────── */
.bg-scene {
  position: fixed; inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .8;
  will-change: transform;
}

.b1 { width: 560px; height: 560px; top: -12%; left: -8%;
     background: #f0f2f7; animation: drift1 26s ease-in-out infinite alternate; }
.b2 { width: 480px; height: 480px; top: -8%; right: -10%;
     background: #eceff5; animation: drift2 30s ease-in-out infinite alternate; }
.b3 { width: 520px; height: 520px; top: 32%; left: -12%;
     background: #f3f4f8; animation: drift3 34s ease-in-out infinite alternate; }
.b4 { width: 620px; height: 620px; bottom: -18%; right: -10%;
     background: #eaedf4; animation: drift1 38s ease-in-out infinite alternate-reverse; }
.b5 { width: 360px; height: 360px; top: 52%; left: 38%;
     background: #f2f4f8; animation: drift2 24s ease-in-out infinite alternate-reverse; }

@keyframes drift1 { to { transform: translate(90px, 120px) scale(1.12); } }
@keyframes drift2 { to { transform: translate(-100px, 90px) scale(.92); } }
@keyframes drift3 { to { transform: translate(120px, -80px) scale(1.08); } }

/* 颗粒质感 */
.grain {
  position: fixed; inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='160'%20height='160'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.9'%20numOctaves='2'/%3E%3C/filter%3E%3Crect%20width='160'%20height='160'%20filter='url(%23n)'/%3E%3C/svg%3E");
}

main, .nav, .footer, .to-top { position: relative; z-index: 2; }

/* 通用玻璃材质 */
.glass-surface {
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow),
              inset 0 1px 0 rgba(255, 255, 255, .9),
              inset 0 -1px 0 rgba(255, 255, 255, .25);
}

/* ── 3. 顶部胶囊导航 ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 18px; left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(880px, calc(100% - 32px));
  padding: 8px;
  border-radius: 999px;
  background: var(--glass-sheen), rgba(255, 255, 255, .55);
  -webkit-backdrop-filter: blur(32px) saturate(2.1);
  backdrop-filter: blur(32px) saturate(2.1);
  border: 1px solid rgba(255, 255, 255, .72);
  box-shadow: 0 16px 44px -12px rgba(23, 40, 99, .28),
              inset 0 1px 0 rgba(255, 255, 255, .95);
  transition: background .4s var(--ease), box-shadow .4s var(--ease);
}

.nav.scrolled {
  background: rgba(255, 255, 255, .68);
  box-shadow: 0 20px 54px -12px rgba(23, 40, 99, .34),
              inset 0 1px 0 rgba(255, 255, 255, 1);
}

.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 12px 4px 6px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid; place-items: center;
  filter: drop-shadow(0 4px 10px rgba(56, 115, 255, .35));
}
.brand-mark svg { border-radius: 9px; }

.brand-name {
  font-size: 17px; font-weight: 700; letter-spacing: .02em;
  display: flex; flex-direction: column; line-height: 1.1;
}
.brand-name i {
  font-style: normal;
  font-size: 9px; font-weight: 600;
  letter-spacing: .22em;
  color: #64748b;
  text-transform: uppercase;
}

.nav-links {
  position: relative;
  display: flex; align-items: center;
  gap: 2px;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
          mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-thumb {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .95), rgba(235, 242, 255, .85));
  box-shadow: 0 2px 8px rgba(23, 40, 99, .12),
              inset 0 1px 0 #fff;
  transition: transform .45s var(--ease), width .45s var(--ease), opacity .3s;
  z-index: 0;
}

.nav-link {
  position: relative; z-index: 1;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px; font-weight: 500;
  color: var(--ink-2);
  white-space: nowrap;
  transition: color .3s;
}
.nav-link:hover { color: var(--ink); }
.nav-link.is-active { color: #1d4ed8; font-weight: 600; }

.nav-cta {
  flex-shrink: 0;
  margin-left: 4px;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px; font-weight: 600;
  color: #fff;
  background: linear-gradient(180deg, #2f7cff, #1d4ed8);
  box-shadow: 0 8px 20px -6px rgba(37, 99, 235, .55),
              inset 0 1px 0 rgba(255, 255, 255, .4);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 26px -6px rgba(37, 99, 235, .65), inset 0 1px 0 rgba(255,255,255,.4); }

/* ── 4. HERO ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 140px 24px 90px;
}

.constellation {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: .6;
}
.c-line {
  stroke-dasharray: 6 12;
  animation: dashDrift 14s linear infinite;
}
@keyframes dashDrift { to { stroke-dashoffset: -180; } }
.c-node {
  transform-box: fill-box;
  transform-origin: center;
  animation: nodePulse 4s ease-in-out infinite;
}
.c-node:nth-child(odd)  { animation-delay: 1.3s; }
.c-node:nth-child(3n)    { animation-delay: 2.6s; }
@keyframes nodePulse {
  0%, 100% { transform: scale(1); opacity: .45; }
  50%      { transform: scale(1.9); opacity: .85; }
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 880px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px; font-weight: 600; letter-spacing: .06em;
  color: #334155;
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(24px) saturate(2);
  backdrop-filter: blur(24px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .9);
  animation: riseIn .9s var(--ease) both;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, .5);
  animation: ping 2s ease-out infinite;
}
@keyframes ping {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, .5); }
  80%  { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  margin-top: 28px;
  font-size: clamp(44px, 8.4vw, 92px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: .01em;
  background: linear-gradient(115deg, #1e3a8a 5%, #0369a1 38%, #2563eb 72%, #1e3a8a 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: riseIn 1s var(--ease) .1s both;
}
.hero-title span {
  background: linear-gradient(115deg, #0ea5e9, #6366f1 55%, #d946ef);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  margin-top: 22px;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--ink-2);
  animation: riseIn 1s var(--ease) .2s both;
}
.br-lg { display: inline; }

.hero-chips {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 10px;
  margin-top: 30px;
  animation: riseIn 1s var(--ease) .3s both;
}
.h-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13px; font-weight: 500;
  color: #334155;
  background: linear-gradient(150deg, rgba(255, 255, 255, .55), rgba(255, 255, 255, .25));
  -webkit-backdrop-filter: blur(20px) saturate(1.9);
  backdrop-filter: blur(20px) saturate(1.9);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: 0 8px 22px -8px rgba(23, 40, 99, .18), inset 0 1px 0 rgba(255, 255, 255, .85);
}
.h-chip svg { width: 14px; height: 14px; stroke: #2563eb; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.hero-cta {
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
  margin-top: 38px;
  animation: riseIn 1s var(--ease) .4s both;
}

/* 按钮 */
.btn-primary {
  position: relative;
  display: inline-flex; align-items: center; gap: 9px;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 16px; font-weight: 600;
  color: #fff;
  background: linear-gradient(180deg, #2f7cff, #1d4ed8);
  box-shadow: 0 14px 32px -8px rgba(37, 99, 235, .6),
              inset 0 1px 0 rgba(255, 255, 255, .45),
              inset 0 -2px 4px rgba(0, 20, 80, .25);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.btn-primary svg { width: 17px; height: 17px; stroke: #fff; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 42%, rgba(255, 255, 255, .55) 50%, transparent 58%);
  transform: translateX(-120%);
  transition: transform .8s var(--ease);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 40px -8px rgba(37, 99, 235, .7),
              inset 0 1px 0 rgba(255, 255, 255, .45),
              inset 0 -2px 4px rgba(0, 20, 80, .25);
}
.btn-primary:hover::after { transform: translateX(120%); }

.btn-glass {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 16px; font-weight: 600;
  color: #1e3a8a;
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(24px) saturate(2);
  backdrop-filter: blur(24px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .95);
  transition: transform .35s var(--ease);
}
.btn-glass:hover { transform: translateY(-3px); }

/* HERO 数据卡 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 58px;
  animation: riseIn 1s var(--ease) .55s both;
}
.stat-card {
  padding: 22px 12px 18px;
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(26px) saturate(2);
  backdrop-filter: blur(26px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .9);
  transition: transform .4s var(--ease);
}
.stat-card:hover { transform: translateY(-5px); }
.stat-card b {
  display: flex; align-items: baseline; justify-content: center; gap: 2px;
  font-size: 38px; font-weight: 800; line-height: 1.1;
  background: linear-gradient(150deg, #1e3a8a, #2563eb 60%, #1e3a8a);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat-card b i { font-style: normal; font-size: 20px; }
.stat-card > span {
  display: block;
  margin-top: 5px;
  font-size: 13px; font-weight: 500;
  color: var(--ink-2);
  letter-spacing: .04em;
}

/* HERO 漂浮小玻璃片 */
.float-chip {
  position: absolute;
  display: flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  color: #334155;
  background: linear-gradient(150deg, rgba(255, 255, 255, .6), rgba(255, 255, 255, .28));
  -webkit-backdrop-filter: blur(22px) saturate(2);
  backdrop-filter: blur(22px) saturate(2);
  border: 1px solid rgba(255, 255, 255, .75);
  box-shadow: 0 14px 34px -10px rgba(23, 40, 99, .25), inset 0 1px 0 rgba(255, 255, 255, .95);
  animation: floaty 7s ease-in-out infinite;
}
.float-chip svg { width: 15px; height: 15px; stroke: #2563eb; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fc1 { top: 24%; right: 9%; animation-delay: 0s; }
.fc2 { bottom: 30%; right: 16%; animation-delay: 1.8s; }
.fc3 { top: 34%; left: 7%; animation-delay: 3.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-16px) rotate(1.2deg); }
}

.scroll-hint {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: #475569;
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(22px) saturate(2);
  backdrop-filter: blur(22px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow);
  animation: hintBob 2.4s ease-in-out infinite;
}
.scroll-hint svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
@keyframes hintBob {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, 8px); }
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 5. 通用区块骨架 ──────────────────────────────────────────── */
.section { padding: 108px 0; }

.sec-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }

.sec-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 11px; font-weight: 700; letter-spacing: .24em;
  color: #475569;
  background: linear-gradient(150deg, rgba(255, 255, 255, .6), rgba(255, 255, 255, .26));
  -webkit-backdrop-filter: blur(18px) saturate(1.9);
  backdrop-filter: blur(18px) saturate(1.9);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: 0 8px 20px -8px rgba(23, 40, 99, .16), inset 0 1px 0 rgba(255, 255, 255, .9);
  text-transform: uppercase;
}
.sec-eyebrow i {
  width: 7px; height: 7px; border-radius: 50%;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  box-shadow: 0 0 8px rgba(56, 189, 248, .8);
}

.sec-title {
  margin-top: 20px;
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 800;
  letter-spacing: .01em;
  background: linear-gradient(115deg, #1e293b, #0f3e5e 60%, #1e3a8a);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sec-desc { margin-top: 14px; color: var(--ink-2); font-size: 16px; }

/* 滚动浮现 */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: calc(var(--d, 0) * 110ms); }
.reveal.in { opacity: 1; transform: none; }

/* ── 6. 关于我们 ──────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 26px;
  align-items: start;
}

.about-text p {
  color: var(--ink-2);
  font-size: 15.5px;
}
.about-text p + p { margin-top: 16px; }
.about-text b { color: #0f3e5e; font-weight: 700; }

.values {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 30px;
}
.value-card {
  padding: 18px 10px 14px;
  text-align: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(24px) saturate(1.9);
  backdrop-filter: blur(24px) saturate(1.9);
  border: 1px solid var(--glass-stroke);
  box-shadow: 0 14px 34px -12px rgba(23, 40, 99, .18), inset 0 1px 0 rgba(255, 255, 255, .9);
  transition: transform .4s var(--ease);
}
.value-card:hover { transform: translateY(-4px) rotate(-.5deg); }
.value-card b { display: block; font-size: 19px; font-weight: 700; color: #0f3e5e; }
.value-card span { font-size: 11px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; }

.about-card {
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .92);
}

.ios-list { list-style: none; }
.ios-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 17px 24px;
  border-top: 1px solid rgba(16, 24, 40, .07);
  font-size: 14.5px;
}
.ios-list li:first-child { border-top: 0; }
.ios-list li span { color: var(--ink-2); }
.ios-list li b { font-weight: 700; color: #0f3e5e; }

/* ── 7. 技术方向 Bento ────────────────────────────────────────── */
.dir-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.dir-card {
  position: relative;
  overflow: hidden;
  padding: 30px 28px 26px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .92);
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(var(--ty, 0));
  transition: transform .18s ease-out, box-shadow .4s var(--ease);
}
.dir-card:hover {
  --ty: -6px;
  box-shadow: 0 34px 70px -18px rgba(23, 40, 99, .3), inset 0 1px 0 rgba(255, 255, 255, .95);
}

.dir-card.big { grid-column: span 4; min-height: 300px; }
.dir-card:not(.big) { grid-column: span 2; }

/* 顶部渐变发丝线 */
.dir-card::before {
  content: "";
  position: absolute;
  top: 0; left: 24px; right: 24px;
  height: 3px;
  border-radius: 999px;
  background: var(--ac);
  opacity: .85;
}

.dir-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 16px;
  color: #fff;
  background: var(--ac);
  box-shadow: 0 10px 24px -6px rgba(var(--ac-soft), .55), inset 0 1px 0 rgba(255, 255, 255, .5);
  position: relative;
}
.dir-icon svg { width: 26px; height: 26px; stroke: #fff; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.dir-en {
  display: block;
  margin-top: 20px;
  font-size: 10.5px; font-weight: 700;
  letter-spacing: .26em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.dir-card h3 {
  margin-top: 6px;
  font-size: 22px; font-weight: 700;
  color: #0f2b46;
}
.dir-card p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-2);
}
.dir-card.big p { font-size: 14.5px; max-width: 88%; }

.dir-tags {
  display: flex; flex-wrap: wrap; gap: 7px;
  margin-top: 18px;
}
.dir-tags span {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px; font-weight: 600;
  color: rgba(var(--ac-soft), 1);
  background: rgba(var(--ac-soft), .1);
  border: 1px solid rgba(var(--ac-soft), .18);
}

.dir-art {
  position: absolute;
  right: 14px; bottom: 10px;
  width: 220px; height: 140px;
  color: rgba(var(--ac-soft), .5);
  opacity: .35;
  pointer-events: none;
}

/* ── 8. 荣誉奖项 ──────────────────────────────────────────────── */
.award-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.award-card {
  padding: 26px 26px 24px;
  border-radius: var(--radius);
  background: var(--glass-sheen), linear-gradient(155deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .92);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.award-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 34px 72px -18px rgba(23, 40, 99, .3), inset 0 1px 0 rgba(255, 255, 255, 1);
}

.award-top {
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.award-year {
  font-size: 15px; font-weight: 800;
  color: #0f3e5e;
  padding: 4px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(255, 255, 255, .8);
  font-variant-numeric: tabular-nums;
}
.award-level {
  font-style: normal;
  padding: 5px 13px;
  border-radius: 999px;
  font-size: 12.5px; font-weight: 700;
  white-space: nowrap;
}
.award-level.gold   { color: #92400e; background: rgba(245, 158, 11, .16); border: 1px solid rgba(245, 158, 11, .35); }
.award-level.blue   { color: #1e40af; background: rgba(37, 99, 235, .10); border: 1px solid rgba(37, 99, 235, .28); }
.award-level.violet { color: #5b21b6; background: rgba(139, 92, 246, .12); border: 1px solid rgba(139, 92, 246, .3); }

.award-card h3 { font-size: 16.5px; font-weight: 700; color: #0f2b46; line-height: 1.45; min-height: 3.2em; }
.award-card h3 span { font-size: 13px; font-weight: 600; color: var(--ink-3); }

.award-meta { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.meta-row {
  display: flex; align-items: baseline; gap: 10px;
  padding: 10px 14px;
  border-radius: 13px;
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(255, 255, 255, .85);
}
.meta-label {
  flex-shrink: 0;
  font-size: 11px; font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink-3);
}
.meta-val { font-size: 13.5px; font-weight: 600; color: #25405e; line-height: 1.5; }

/* ── 9. 成员去向 ──────────────────────────────────────────────── */
.dest-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}
.dest-grid > .dest-panel { min-width: 0; }
.member-list.cols > .member-row { min-width: 0; }

.dest-panel {
  padding: 26px 26px 24px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .92);
  transition: transform .45s var(--ease);
}
.dest-panel:hover { transform: translateY(-5px); }

.dest-panel header {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 20px;
}
.dest-ico {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: linear-gradient(150deg, #f8fafc, #e2e8f0);
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: 0 8px 18px -6px rgba(23, 40, 99, .18);
  flex-shrink: 0;
}
.dest-ico svg { width: 23px; height: 23px; stroke: #2563eb; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.dest-panel header h3 { font-size: 18px; font-weight: 700; color: #0f2b46; line-height: 1.3; }
.dest-en { font-size: 10px; letter-spacing: .22em; color: var(--ink-3); text-transform: uppercase; }
.dest-count {
  margin-left: auto;
  font-size: 12px; font-weight: 700;
  color: #1e40af;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, .09);
  border: 1px solid rgba(37, 99, 235, .2);
  white-space: nowrap;
}

/* 分组小标题（正在实习 / 已签约） */
.group-label {
  display: flex; align-items: center; gap: 8px;
  margin: 20px 0 10px;
  font-size: 12.5px; font-weight: 700;
  letter-spacing: .12em;
  color: var(--ink-2);
}
.dest-panel header + .group-label { margin-top: 0; }
.member-list + .group-label { margin-top: 22px; }
.dot-live {
  width: 7px; height: 7px; border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 0 0 rgba(245, 158, 11, .5);
  animation: ping 2s ease-out infinite;
}
.dot-done {
  width: 7px; height: 7px; border-radius: 50%;
  background: #8b5cf6;
  box-shadow: 0 0 6px rgba(139, 92, 246, .6);
}

/* 成员条目 */
.member-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.member-list.cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.member-row {
  display: flex; align-items: center; gap: 13px;
  padding: 11px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(255, 255, 255, .85);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.member-row:hover {
  transform: translateX(4px);
  box-shadow: 0 10px 22px -10px rgba(23, 40, 99, .22);
}
.avatar {
  flex-shrink: 0;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 15px; font-weight: 700;
  color: #fff;
  background: linear-gradient(150deg, #60a5fa, #6366f1);
  box-shadow: 0 4px 10px -2px rgba(56, 115, 255, .45), inset 0 1px 0 rgba(255, 255, 255, .4);
}
.member-info { min-width: 0; }
.member-info b { display: block; font-size: 14.5px; font-weight: 700; color: #0f2b46; line-height: 1.35; }
.member-info span {
  display: block;
  font-size: 12px; color: var(--ink-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tag {
  margin-left: auto;
  flex-shrink: 0;
  font-style: normal;
  font-size: 11px; font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.tag.rec    { color: #4338ca; background: rgba(79, 70, 229, .10); border: 1px solid rgba(79, 70, 229, .25); }
.tag.exam   { color: #1e40af; background: rgba(37, 99, 235, .10); border: 1px solid rgba(37, 99, 235, .25); }
.tag.intern { color: #b45309; background: rgba(245, 158, 11, .14); border: 1px solid rgba(245, 158, 11, .3); }
.tag.offer  { color: #6d28d9; background: rgba(139, 92, 246, .12); border: 1px solid rgba(139, 92, 246, .3); }

/* ── 10. 团队风采：单卡左右切换轮播 ────────────────────────────── */
.g-flip {
  display: flex; flex-direction: column;
  gap: 22px;
  max-width: 860px;
  margin-inline: auto;
}

.flip-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .75);
  box-shadow: var(--glass-shadow);
  cursor: pointer;
  perspective: 1400px;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.flip-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 34px 72px -18px rgba(23, 40, 99, .3);
}

/* 切换视口：图片左右滑入滑出的舞台 */
.flip-viewport {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #e8ecf4;
  transform-style: preserve-3d;
}
.flip-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  backface-visibility: hidden;
  transition: transform .65s var(--ease), opacity .65s var(--ease);
}
/* 离场（下一张）：向左滑走 */
.flip-img.is-out {
  transform: translateX(-56%) rotateY(28deg) scale(.92);
  opacity: 0;
}
/* 入场（下一张）：从右侧滑入 */
.flip-img.is-in {
  transform: translateX(56%) rotateY(-28deg) scale(.92);
  opacity: 0;
  transition: none;
}
/* 离场（上一张）：向右滑走 */
.flip-img.is-out-rev {
  transform: translateX(56%) rotateY(-28deg) scale(.92);
  opacity: 0;
}
/* 入场（上一张）：从左侧滑入 */
.flip-img.is-in-rev {
  transform: translateX(-56%) rotateY(28deg) scale(.92);
  opacity: 0;
  transition: none;
}

/* 图注条（仅照片编号） */
.flip-card figcaption {
  position: absolute;
  left: 14px; bottom: 14px;
  padding: 8px 16px;
  border-radius: 999px;
  color: #0f2b46;
  font-size: 13px; font-weight: 600;
  background: linear-gradient(150deg, rgba(255, 255, 255, .74), rgba(255, 255, 255, .42));
  -webkit-backdrop-filter: blur(22px) saturate(2);
  backdrop-filter: blur(22px) saturate(2);
  border: 1px solid rgba(255, 255, 255, .82);
  box-shadow: 0 10px 26px -10px rgba(23, 40, 99, .3), inset 0 1px 0 rgba(255, 255, 255, .95);
  pointer-events: none;
}

/* 透明侧箭头 */
.flip-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 50%;
  cursor: pointer;
  color: #fff;
  background: rgba(255, 255, 255, .08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 6px 16px -6px rgba(23, 40, 99, .35);
  opacity: 0;
  transition: opacity .35s var(--ease), transform .35s var(--ease), background .35s var(--ease);
}
.flip-prev { left: 14px; }
.flip-next { right: 14px; }

.flip-card:hover .flip-arrow,
.flip-arrow:focus-visible { opacity: 1; }
.flip-arrow:hover {
  background: rgba(255, 255, 255, .3);
  transform: translateY(-50%) scale(1.1);
}
.flip-arrow:active { transform: translateY(-50%) scale(.94); }
.flip-arrow svg {
  width: 20px; height: 20px;
  stroke: currentColor; fill: none;
  stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round;
  filter: drop-shadow(0 1px 3px rgba(8, 15, 40, .6));
}
/* 触屏设备无 hover：箭头常显 */
@media (hover: none) {
  .flip-arrow { opacity: .75; }
}

@media (prefers-reduced-motion: reduce) {
  .flip-img { transition: opacity .01ms; transform: none !important; }
}

/* ── 11. 加入我们 ─────────────────────────────────────────────── */
.join-grid {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  gap: 26px;
  align-items: start;
}

.join-col-title {
  font-size: 13px; font-weight: 800;
  letter-spacing: .2em;
  color: #64748b;
  text-transform: uppercase;
  margin: 0 0 18px 4px;
}
.join-col > .join-col-title:first-child { margin-top: 0; }
.join-col .join-col-title:not(:first-child) { margin-top: 34px; }

.steps {
  list-style: none;
  position: relative;
  display: flex; flex-direction: column; gap: 14px;
}
.steps::before {
  content: "";
  position: absolute;
  left: 27px; top: 22px; bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(56, 189, 248, .55), rgba(99, 102, 241, .55));
}
.step {
  position: relative;
  display: flex; gap: 18px; align-items: flex-start;
  padding: 20px 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(24px) saturate(1.9);
  backdrop-filter: blur(24px) saturate(1.9);
  border: 1px solid var(--glass-stroke);
  box-shadow: 0 14px 34px -12px rgba(23, 40, 99, .18), inset 0 1px 0 rgba(255, 255, 255, .9);
  transition: transform .4s var(--ease);
}
.step:hover { transform: translateX(6px); }
.step-num {
  position: relative; z-index: 1;
  flex-shrink: 0;
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  font-size: 13px; font-weight: 800;
  color: #fff;
  background: linear-gradient(150deg, #38bdf8, #6366f1);
  box-shadow: 0 8px 18px -4px rgba(56, 115, 255, .5), inset 0 1px 0 rgba(255, 255, 255, .5);
  font-variant-numeric: tabular-nums;
}
.step h4 { font-size: 16px; font-weight: 700; color: #0f2b46; }
.step p { margin-top: 5px; font-size: 13.5px; color: var(--ink-2); }

/* iOS 分段控制器 */
.seg-wrap {
  padding: 22px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(30px) saturate(2);
  backdrop-filter: blur(30px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .92);
}
/* 考核时间提示 */
.join-time {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 16px;
}
.jt-item {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px; font-weight: 500;
  color: var(--ink-2);
  background: var(--glass-sheen), linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(24px) saturate(2);
  backdrop-filter: blur(24px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .95);
}
.jt-item b { color: #0f3e5e; font-weight: 700; }

/* 考核内容说明 */
.exam-note {
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--ink-2);
}
.exam-note b { color: #0f3e5e; font-weight: 700; }

.task-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.task-list li {
  position: relative;
  padding: 12px 14px 12px 42px;
  border-radius: 14px;
  font-size: 14px;
  color: #25405e;
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(255, 255, 255, .85);
}
.task-list li::before {
  content: "✓";
  position: absolute;
  left: 13px; top: 50%;
  transform: translateY(-50%);
  display: grid; place-items: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  font-size: 11px; font-weight: 800;
  color: #fff;
  background: linear-gradient(150deg, #3b82f6, #1d4ed8);
  box-shadow: 0 3px 8px rgba(37, 99, 235, .4);
}

.rules { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.rules li {
  padding: 14px 18px 14px 16px;
  border-radius: 14px;
  font-size: 14px;
  color: var(--ink-2);
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(22px) saturate(1.9);
  backdrop-filter: blur(22px) saturate(1.9);
  border: 1px solid var(--glass-stroke);
  box-shadow: 0 10px 24px -10px rgba(23, 40, 99, .16), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.rules li b { color: #0f3e5e; margin-right: 6px; }

/* CTA 大卡：左二维码 + 右文字 */
.join-cta {
  position: relative;
  overflow: hidden;
  margin-top: 44px;
  padding: 48px 56px;
  border-radius: 36px;
  display: flex; align-items: center; gap: 48px;
  background: linear-gradient(150deg, var(--glass-hi), var(--glass-lo));
  -webkit-backdrop-filter: blur(26px) saturate(1.9);
  backdrop-filter: blur(26px) saturate(1.9);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .95);
}
.cta-glow {
  position: absolute;
  top: -45%; left: 50%;
  transform: translateX(-50%);
  width: 720px; height: 460px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(56, 189, 248, .28), rgba(99, 102, 241, .18), transparent 70%);
  filter: blur(30px);
  pointer-events: none;
}

/* 大号二维码 */
.qr-large {
  position: relative;
  flex-shrink: 0;
  width: 168px; height: 168px;
  border-radius: 22px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: 0 16px 36px -12px rgba(23, 40, 99, .25), inset 0 0 0 1px rgba(16, 24, 40, .05);
}
.qr-large img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

/* 右侧文字区 */
.cta-text { position: relative; text-align: left; flex: 1; min-width: 0; }
.join-cta h3 {
  position: relative;
  font-size: clamp(28px, 4.4vw, 42px);
  font-weight: 800;
  background: linear-gradient(115deg, #1e3a8a, #0369a1 55%, #4f46e5);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}
.join-cta > p { position: relative; margin-top: 10px; color: var(--ink-2); }
.cta-text > p { position: relative; margin-top: 10px; color: var(--ink-2); }

.contact-row {
  position: relative;
  display: flex; justify-content: flex-start; flex-wrap: wrap; gap: 14px;
  margin: 26px 0 0;
}
.contact-item {
  display: flex; align-items: center; gap: 13px;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .55);
  border: 1px solid rgba(255, 255, 255, .88);
  box-shadow: 0 12px 28px -10px rgba(23, 40, 99, .18), inset 0 1px 0 rgba(255, 255, 255, .95);
  text-align: left;
}
.contact-item svg { width: 26px; height: 26px; stroke: #1d4ed8; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.contact-item span { display: block; font-size: 11.5px; color: var(--ink-3); letter-spacing: .04em; }
.contact-item b { display: block; font-size: 15px; font-weight: 700; color: #0f2b46; font-variant-numeric: tabular-nums; }

.cta-btn { position: relative; padding: 16px 40px; font-size: 16.5px; }

/* ── 12. 页脚 / 返回顶部 ───────────────────────────────────────── */
.footer {
  padding: 44px 0 40px;
}
.footer-inner {
  display: flex; align-items: center; flex-wrap: wrap; gap: 20px;
  padding: 26px 32px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(255, 255, 255, .5), rgba(255, 255, 255, .24));
  -webkit-backdrop-filter: blur(26px) saturate(2);
  backdrop-filter: blur(26px) saturate(2);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15.5px; color: #0f2b46; }
.brand-mark.sm svg { border-radius: 8px; }
.footer-nav { margin-left: auto; display: flex; gap: 22px; }
.footer-nav a { font-size: 13.5px; font-weight: 500; color: var(--ink-2); transition: color .3s; }
.footer-nav a:hover { color: #1d4ed8; }
.footer-copy { width: 100%; margin-top: 4px; font-size: 12.5px; color: var(--ink-3); text-align: center; }

.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  z-index: 90;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border: 0;
  border-radius: 50%;
  color: #1e3a8a;
  cursor: pointer;
  background: linear-gradient(150deg, rgba(255, 255, 255, .72), rgba(255, 255, 255, .4));
  -webkit-backdrop-filter: blur(24px) saturate(2);
  backdrop-filter: blur(24px) saturate(2);
  border: 1px solid rgba(255, 255, 255, .85);
  box-shadow: 0 14px 34px -10px rgba(23, 40, 99, .3), inset 0 1px 0 rgba(255, 255, 255, .95);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .4s var(--ease), transform .4s var(--ease), visibility .4s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-3px); }
.to-top svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

/* ── 13. 响应式 ────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .nav-cta { display: none; }
}

@media (max-width: 960px) {
  .brand-name i { display: none; }
  .nav-thumb { opacity: 0; }
  .nav-link.is-active {
    background: linear-gradient(180deg, rgba(255, 255, 255, .95), rgba(235, 242, 255, .9));
    box-shadow: 0 2px 8px rgba(23, 40, 99, .12), inset 0 1px 0 #fff;
  }

  .float-chip { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }

  .about-grid { grid-template-columns: 1fr; }
  .values { grid-template-columns: repeat(4, 1fr); gap: 10px; }

  .dir-grid { grid-template-columns: repeat(2, 1fr); }
  .dir-card.big, .dir-card:not(.big) { grid-column: span 2; }
  .dir-card.big p { max-width: 100%; }

  .award-grid { grid-template-columns: repeat(2, 1fr); }

  .join-grid { grid-template-columns: 1fr; }

  .g-grid { grid-auto-rows: 220px; }
  .flip-viewport { aspect-ratio: 4 / 3; }
}

@media (max-width: 640px) {
  .container { width: calc(100% - 36px); }
  .section { padding: 76px 0; }
  .br-lg { display: none; }

  .hero { padding-top: 118px; }
  .hero-stats { gap: 10px; }
  .stat-card { padding: 16px 8px 14px; }
  .stat-card b { font-size: 30px; }
  .stat-card b i { font-size: 16px; }

  .award-grid { grid-template-columns: 1fr; }
  .award-card h3 { min-height: 0; }

  .member-list.cols { grid-template-columns: 1fr; }

  .flip-viewport { aspect-ratio: 3 / 2; }
  .flip-card figcaption { font-size: 12px; padding: 8px 10px 8px 14px; }
  .flip-btn { padding: 6px 12px; font-size: 11.5px; }

  .values { grid-template-columns: repeat(2, 1fr); }

  .contact-row { flex-direction: column; align-items: stretch; }
  .contact-item { justify-content: flex-start; }

  .join-cta { flex-direction: column; text-align: center; padding: 40px 24px 36px; gap: 28px; }
  .qr-large { width: 150px; height: 150px; }
  .cta-text { text-align: center; }
  .contact-row { align-items: center; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-nav { margin-left: 0; }

  .to-top { right: 16px; bottom: 16px; }
}

/* ── 14. 动效偏好 ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}