/* ============================================================
   中启智元官网 · v003 全站样式
   配色风格参考 wanxueai-studio.cn：蓝紫青渐变 + 白/浅灰底 + 深色页脚
   ============================================================ */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-violet: #7c3aed;
  --color-cyan: #06b6d4;
  --gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 55%, #06b6d4 130%);
  --color-ink: #0f172a;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-soft: #f8fafc;
  --color-line: #e2e8f0;
  --color-tint: #eef2ff;
  --color-footer: #0f172a;
  --color-on-gradient: #ffffff;
  --max: 1140px;
  --radius: 16px;
  --radius-btn: 999px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: "Space Grotesk", "PingFang SC", sans-serif;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, .14);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
.wrap { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid var(--color-line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; min-height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-weight: 700; font-size: 1.125rem;
  color: var(--color-ink);
}
.brand img {
  width: 40px; height: 40px; object-fit: contain;
  object-position: center; flex-shrink: 0; padding: 1px;
}
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; color: var(--color-text); font-size: 0.95rem; }
.nav-links a { padding: 8px 14px; border-radius: 8px; transition: background .2s, color .2s; }
.nav-links a:hover, .nav-links a.active { background: var(--color-tint); color: var(--color-primary); }
.nav-cta {
  margin-left: 10px; padding: 9px 20px; border-radius: var(--radius-btn);
  background: var(--gradient); color: #fff !important; font-weight: 600; font-size: 0.9rem;
  box-shadow: 0 6px 16px rgba(79, 70, 229, .35);
  transition: filter .2s, transform .2s;
}
.nav-cta:hover { filter: brightness(1.08); transform: translateY(-1px); }

/* ---------- 汉堡菜单（移动端） ---------- */
.nav-toggle { display: none; }
.nav-toggle-label {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  align-items: center; justify-content: center; cursor: pointer;
  border: 1px solid var(--color-line); background: #fff;
}
.nav-toggle-label span, .nav-toggle-label span::before, .nav-toggle-label span::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--color-ink);
  border-radius: 2px; position: relative; transition: transform .25s ease;
}
.nav-toggle-label span::before { position: absolute; top: -7px; }
.nav-toggle-label span::after { position: absolute; top: 7px; }

/* ---------- Hero（浅色光晕底） ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(124, 58, 237, .18), transparent 60%),
    radial-gradient(800px 420px at -10% 30%, rgba(6, 182, 212, .16), transparent 60%),
    linear-gradient(180deg, #f5f7ff 0%, #ffffff 100%);
  padding: 96px 0 88px;
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--color-primary); background: #fff; border: 1px solid #e0e7ff;
  border-radius: 999px; padding: 6px 16px; font-size: 0.85rem; font-weight: 600;
  margin-bottom: 22px; box-shadow: var(--shadow);
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #22c55e; }
.hero h1 {
  font-family: var(--font-en);
  font-size: clamp(2.5rem, 5vw, 3.6rem);
  font-weight: 900; line-height: 1.22; letter-spacing: .01em;
  color: var(--color-ink); margin-bottom: 14px;
}
.hero h1 em {
  font-style: normal;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .tagline { font-size: 1.15rem; font-weight: 600; margin-bottom: 12px; color: var(--color-ink); }
.hero .desc { color: var(--color-text-light); max-width: 34rem; margin-bottom: 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius-btn); font-weight: 600; font-size: 0.95rem;
  transition: transform .2s, box-shadow .2s, filter .2s; cursor: pointer; border: 0;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--gradient); color: var(--color-on-gradient);
  box-shadow: 0 10px 24px rgba(79, 70, 229, .4);
}
.btn-primary:hover { filter: brightness(1.06); box-shadow: 0 14px 30px rgba(79, 70, 229, .5); }
.btn-ghost { background: #fff; color: var(--color-ink); border: 1.5px solid var(--color-line); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-soft {
  background: var(--color-primary); color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .35);
}
.btn-soft:hover { background: var(--color-primary-dark); }
.hero-visual { position: relative; display: grid; place-items: center; }
.hero-visual .logo-wrap {
  width: min(360px, 100%);
  position: relative;
  padding: 0;
  background: none;
  border: 0;
  box-shadow: none;
  transform: none;
}
.hero-visual img { width: 100%; height: auto; object-fit: contain; max-height: 300px; }

/* AI 获客闭环 · GEO 原生支持（首页右侧）玻璃拟态 */
.geo-card {
  width: min(400px, 100%);
  position: relative;
  background: linear-gradient(165deg, rgba(255,255,255,.86), rgba(237,242,255,.62) 55%, rgba(244,240,255,.55));
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(79, 70, 229, .16), inset 0 1px 0 rgba(255,255,255,.9);
  padding: 28px 26px;
  backdrop-filter: blur(20px) saturate(1.15);
  -webkit-backdrop-filter: blur(20px) saturate(1.15);
  overflow: hidden;
}
.geo-card::before {
  content: "";
  position: absolute; inset: 0; pointer-events: none; border-radius: 24px;
  background:
    radial-gradient(420px 200px at 85% -8%, rgba(124, 58, 237, .16), transparent 60%),
    radial-gradient(360px 200px at -8% 105%, rgba(6, 182, 212, .14), transparent 60%),
    radial-gradient(300px 160px at 108% 60%, rgba(37, 99, 235, .1), transparent 65%);
}
.geo-head, .geo-flow, .geo-tags, .geo-cta { position: relative; z-index: 1; }
.geo-head { text-align: center; margin-bottom: 22px; }
.geo-badge {
  display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  color: var(--color-primary); background: var(--color-tint);
  border: 1px solid #e0e7ff; border-radius: 999px; padding: 4px 12px; margin-bottom: 10px;
}
.geo-title {
  font-family: var(--font-en); font-size: 1.3rem; font-weight: 800; color: var(--color-ink);
}
.geo-title em {
  font-style: normal;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.geo-sub { font-size: .82rem; color: var(--color-text-light); margin-top: 4px; }

/* 纵向时间轴流程（流动渐变 + 高亮光效） */
.geo-flow { position: relative; padding-left: 34px; }
.geo-flow::before {
  content: ""; position: absolute; left: 11px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-violet), var(--color-cyan));
  background-size: 100% 300%;
  border-radius: 2px;
  animation: geo-flow-slide 3.2s linear infinite;
}
.geo-flow::after {
  content: ""; position: absolute; left: 6px; top: 0; width: 12px; height: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, .9), rgba(124, 58, 237, .35) 60%, transparent 75%);
  filter: blur(1px);
  animation: geo-flow-dot 3.2s linear infinite;
}
.geo-node { position: relative; padding: 0 0 20px; }
.geo-node:last-child { padding-bottom: 4px; }
.geo-node::before {
  content: ""; position: absolute; left: -30px; top: 4px; width: 12px; height: 12px;
  border-radius: 50%; background: #fff; border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-tint);
  animation: geo-node-pulse 2.4s ease-in-out infinite;
}
.geo-node:nth-child(2)::before { animation-delay: .3s; }
.geo-node:nth-child(3)::before { animation-delay: .6s; }
.geo-node:nth-child(4)::before { animation-delay: .9s; }
.geo-node .geo-step {
  font-size: .7rem; font-weight: 700; letter-spacing: .06em; color: var(--color-violet);
  margin-bottom: 2px;
}
.geo-node h4 { font-size: 1.02rem; font-weight: 700; color: var(--color-ink); margin-bottom: 3px; }
.geo-node p { font-size: .82rem; color: var(--color-text-light); }

@keyframes geo-flow-slide {
  0% { background-position: 0 0; }
  100% { background-position: 0 300%; }
}
@keyframes geo-flow-dot {
  0% { top: 0; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { top: calc(100% - 8px); opacity: 0; }
}
@keyframes geo-node-pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--color-tint), 0 0 0 0 rgba(37, 99, 235, .35); }
  50% { box-shadow: 0 0 0 4px var(--color-tint), 0 0 0 9px rgba(37, 99, 235, 0); }
}

/* 底部注脚标签 */
.geo-tags {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--color-line);
}
.geo-tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .74rem; font-weight: 600; color: var(--color-ink);
  background: var(--color-bg-soft); border: 1px solid var(--color-line);
  border-radius: 999px; padding: 4px 12px;
}
.geo-tag .tick { color: var(--color-primary); font-weight: 800; }

/* CTA 行动区 */
.geo-cta { margin-top: 18px; text-align: center; }
.geo-cta .btn { width: 100%; }
.hero-visual .logo-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    115deg,
    transparent 0%,
    transparent 42%,
    rgba(255, 255, 255, .7) 50%,
    transparent 58%,
    transparent 100%
  );
  background-size: 220% 100%;
  animation: logo-sheen 12s ease-in-out infinite;
  mix-blend-mode: screen;
  -webkit-mask-image: url("assets/logo-hero.png");
  mask-image: url("assets/logo-hero.png");
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
}
.hero-stats { display: flex; gap: 40px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats .num { font-family: var(--font-en); font-size: 1.7rem; font-weight: 800; color: var(--color-ink); }
.hero-stats .num span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .label { font-size: .82rem; color: var(--color-text-light); margin-top: 2px; }

/* 内页小 Hero */
.hero-sub {
  position: relative; overflow: hidden;
  background:
    radial-gradient(700px 320px at 90% -10%, rgba(124, 58, 237, .16), transparent 60%),
    linear-gradient(180deg, #f5f7ff, #fff);
  padding: 72px 0 60px;
}
.hero-sub-inner { position: relative; z-index: 2; }
.hero-sub h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 900; color: var(--color-ink); margin-bottom: 12px; }
.hero-sub p { color: var(--color-text-light); max-width: 42rem; }
.crumb { display: inline-block; margin-bottom: 16px; font-size: .85rem; color: var(--color-text-light); }
.crumb b { color: var(--color-primary); font-weight: 600; }

/* ---------- 区块 ---------- */
section { padding: 84px 0; }
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800; color: var(--color-ink);
  margin-bottom: 12px; letter-spacing: .01em; line-height: 1.3;
}
.section-head h2 em {
  font-style: normal;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-head p { color: var(--color-text-light); }
.overline {
  display: inline-block; font-size: .82rem; font-weight: 600; color: var(--color-primary);
  background: var(--color-tint); border: 1px solid #e0e7ff; padding: 4px 14px;
  border-radius: 999px; margin-bottom: 14px; letter-spacing: .5px;
}

/* ---------- 卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #c7d2fe; }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--gradient); color: #fff; margin-bottom: 18px; font-size: 1.5rem;
  box-shadow: 0 8px 20px rgba(124, 58, 237, .3);
}
.card .icon .svg-icon { width: 28px; height: 28px; }
.card h3 { font-size: 1.15rem; color: var(--color-ink); margin-bottom: 10px; }
.card p { font-size: .9rem; color: var(--color-text-light); margin-bottom: 14px; }
.card .more { color: var(--color-primary); font-weight: 600; font-size: .88rem; }
.card .more:hover { color: var(--color-violet); }
.card .badge {
  display: inline-block; background: var(--color-tint); color: var(--color-primary);
  border: 1px solid #e0e7ff; font-size: .78rem; font-weight: 600;
  padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
}
.card .num {
  font-family: var(--font-en); font-size: 2.2rem; font-weight: 800;
  color: var(--color-ink); line-height: 1; margin-bottom: 8px;
}
.card .num small { font-size: 1rem; color: var(--color-text-light); font-weight: 500; }

/* 交替浅灰带 */
.band { background: var(--color-bg-soft); }

/* ---------- 步骤条 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  position: relative; background: #fff;
  border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 26px 22px; transition: transform .25s, box-shadow .25s;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--font-en); font-size: 2.1rem; font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: 10px; line-height: 1;
}
.step h3 { font-size: 1.05rem; color: var(--color-ink); margin-bottom: 8px; }
.step p { font-size: .9rem; color: var(--color-text-light); }

/* ---------- 案例 ---------- */
.case {
  display: flex; gap: 18px; align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.case:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case .logo-slot {
  width: 64px; height: 64px; border-radius: 14px; flex-shrink: 0;
  display: grid; place-items: center; font-family: var(--font-en); font-weight: 700;
  background: var(--gradient); color: #fff; font-size: 1.35rem;
  box-shadow: 0 8px 20px rgba(124, 58, 237, .3);
}
.case .label { color: var(--color-primary); font-size: .8rem; font-weight: 700; letter-spacing: .08em; margin-bottom: 6px; }
.case h3 { margin-bottom: 8px; font-size: 1.1rem; color: var(--color-ink); }
.case p { font-size: .93rem; color: var(--color-text-light); }

/* ---------- 特性列表 ---------- */
.feat-list { display: grid; gap: 16px; }
.feat {
  display: flex; gap: 14px; align-items: flex-start;
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.feat:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feat .tick {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0; margin-top: 2px;
  background: var(--gradient); color: #fff; display: grid; place-items: center; font-size: .82rem; font-weight: 700;
}
.feat h3 { font-size: 1.05rem; margin-bottom: 4px; color: var(--color-ink); }
.feat p { font-size: .93rem; color: var(--color-text-light); }

/* ---------- 表格（课程） ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--color-line); box-shadow: var(--shadow); background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { text-align: left; padding: 14px 18px; font-size: .93rem; }
thead th {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff; font-weight: 600; font-size: .9rem;
}
tbody tr:nth-child(even) { background: var(--color-bg-soft); }
tbody td { border-top: 1px solid var(--color-line); color: var(--color-text-light); }
tbody td:first-child { color: var(--color-ink); font-weight: 600; }

/* ---------- 数据条幅 ---------- */
.banner-stats {
  background: var(--gradient); border-radius: 24px; color: #fff;
  padding: 48px 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center;
  box-shadow: 0 24px 60px rgba(79, 70, 229, .35);
}
.banner-stats .num { font-family: var(--font-en); font-size: 2.4rem; font-weight: 900; }
.banner-stats .label { font-size: .88rem; opacity: .85; margin-top: 4px; }

/* ---------- 表单 ---------- */
.form-card {
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: 6px; color: var(--color-ink); }
.form-group label .req { color: var(--color-primary); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 11px 14px; font-size: .95rem;
  border: 1.5px solid var(--color-line); border-radius: 10px; background: #fff;
  transition: border-color .2s, box-shadow .2s; color: var(--color-ink);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: .8rem; color: var(--color-text-light); margin-top: 12px; }

/* ---------- 联系信息 ---------- */
.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow);
}
.contact-item .ico {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; background: var(--color-tint); color: var(--color-primary); font-size: 1.2rem;
}
.contact-item .ico .svg-icon { width: 24px; height: 24px; }
.contact-item h3 { font-size: .88rem; color: var(--color-text-light); font-weight: 600; margin-bottom: 4px; }
.contact-item p { font-size: 1rem; color: var(--color-ink); font-weight: 600; }

/* ---------- 最终 CTA ---------- */
.final-cta { text-align: center; padding: 70px 24px; background: var(--color-bg); }
.final-cta h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; color: var(--color-ink); margin-bottom: 12px; }
.final-cta h2 em { font-style: normal; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.final-cta p { color: var(--color-text-light); margin-bottom: 28px; }
.final-cta .btn-primary { box-shadow: 0 10px 24px rgba(79, 70, 229, .4); }

/* ---------- 页脚（深色） ---------- */
footer {
  background: var(--color-footer); color: #94a3b8;
  padding: 56px 0 0; margin-top: 40px; font-size: .9rem;
}
.foot-inner {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; justify-content: space-between;
  padding-bottom: 40px;
}
.foot-brand { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 600; }
.foot-brand img {
  width: 52px; height: 52px; object-fit: cover; object-position: center;
  flex-shrink: 0; padding: 0; border-radius: 14px;
  background: #fff;
}
.foot-links { display: flex; gap: 18px; flex-wrap: wrap; }
.foot-links a { font-size: .9rem; transition: color .2s; }
.foot-links a:hover { color: #93c5fd; }
.foot-line {
  width: 100%; text-align: center; font-size: .82rem; opacity: .7;
  border-top: 1px solid #1e293b; padding: 20px 0;
}

/* ---------- 动画 ---------- */
@keyframes float {
  0%, 100% { transform: rotate(1.5deg) translateY(0); }
  50% { transform: rotate(1.5deg) translateY(-12px); }
}
@keyframes logo-sheen {
  0% { background-position: 120% 0; }
  100% { background-position: -20% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-visual .logo-wrap::after { animation: none; }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: none; }
}
.fade-up { animation: fade-up .6s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }

/* reveal 滚动显现（配合 js/reveal.js） */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 64px 0; }
  .hero h1 { font-size: 2.25rem; }
  .hero-visual { order: -1; }
  .hero-visual .logo-wrap { width: min(250px, 72vw); padding: 0; background: none; border: 0; box-shadow: none; }
  .geo-card { width: min(340px, 100%); padding: 24px 20px; }
  .banner-stats { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid-3, .grid-2, .steps { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
  .nav-toggle-label { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff;
    border-bottom: 1px solid var(--color-line); padding: 12px 24px 20px;
    box-shadow: var(--shadow);
  }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-toggle:checked ~ .nav-toggle-label span { background: transparent; }
  .nav-toggle:checked ~ .nav-toggle-label span::before { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-toggle-label span::after { transform: translateY(-7px) rotate(-45deg); }
  .nav-links a { padding: 12px 8px; border-radius: 8px; }
  .nav-cta { display: none; }
  .hero-stats { gap: 24px; }
  .banner-stats { grid-template-columns: 1fr 1fr; padding: 36px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}