/* ============================================================
   合同闪签 · 产品官网 设计系统 V3
   精致企业风（Stripe / 飞书）— 大留白 · 柔和色 · 精细排版
   品牌 #4263eb · 中性色为主 · 蓝只做点睛
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --primary-50: #eef2ff;  --primary-100: #dbe4ff;  --primary-200: #bccbff;
  --primary-300: #93aaff; --primary-400: #6682f5;  --primary-500: #4263eb;
  --primary-600: #3452d8; --primary-700: #2b44c0;  --primary-800: #243a9e;
  --primary-900: #1f3180;
  --primary: var(--primary-500);
  --primary-dark: var(--primary-600);
  --primary-deep: var(--primary-900);

  --gray-25: #fcfcfd;  --gray-50: #f7f8fa;  --gray-100: #eef0f4;
  --gray-200: #e2e5ec; --gray-300: #c8cdd8; --gray-400: #9aa2b1;
  --gray-500: #6f7686; --gray-600: #4c5364; --gray-700: #343b49;
  --gray-800: #232936; --gray-900: #141821;
  --ink: var(--gray-900);
  --ink-2: var(--gray-600);
  --ink-3: var(--gray-500);

  --gold: #f59f00;      --gold-light: #fff6e3;
  --green: #2f9e44;     --green-light: #e9fbee;
  --red: #e03131;       --red-light: #fff0f0;

  --grad-brand: linear-gradient(135deg, #5b7bfa 0%, #4263eb 60%, #3452d8 100%);
  --grad-soft: linear-gradient(180deg, #ffffff 0%, #f7f9ff 100%);

  --line: var(--gray-100);
  --bg: #f7f9fc;

  --r-sm: 10px; --r-md: 14px; --r-lg: 18px; --r-xl: 24px;

  --shadow-xs: 0 1px 2px rgba(20, 24, 33, .04);
  --shadow-1: 0 1px 3px rgba(20, 24, 33, .05), 0 6px 16px rgba(20, 24, 33, .05);
  --shadow-2: 0 2px 6px rgba(20, 24, 33, .06), 0 14px 32px rgba(20, 24, 33, .09);
  --shadow-3: 0 4px 10px rgba(20, 24, 33, .07), 0 24px 52px rgba(20, 24, 33, .12);
  --shadow-brand: 0 10px 26px rgba(66, 99, 235, .28);
  --shadow-ring: 0 0 0 4px rgba(66, 99, 235, .12);

  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px; --sp-5: 20px;
  --sp-6: 24px; --sp-8: 32px; --sp-10: 40px; --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-num: -apple-system, "SF Pro Display", "Helvetica Neue", "PingFang SC", sans-serif;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: #fff;
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.3; }
img { max-width: 100%; display: block; }
a { color: var(--primary-600); text-decoration: none; }
::selection { background: var(--primary-500); color: #fff; }
:focus-visible { outline: none; box-shadow: var(--shadow-ring); border-radius: 6px; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 var(--sp-5); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-bottom-color: var(--gray-100); box-shadow: 0 6px 24px rgba(20, 24, 33, .05); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: var(--sp-4); }
.nav-logo { display: flex; align-items: center; gap: 11px; }
.nav-logo img.logo-img {
  width: 38px; height: 38px; border-radius: 10px; object-fit: cover;
  box-shadow: var(--shadow-xs), 0 0 0 1px rgba(20, 24, 33, .05);
  transition: transform .2s;
}
.nav-logo:hover img.logo-img { transform: translateY(-1px); }
.nav-logo .logo-text { font-size: 19px; font-weight: 800; color: var(--gray-900); letter-spacing: .01em; }
.nav-logo:hover .logo-text { color: var(--primary-600); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  color: var(--gray-600); font-size: 15px; font-weight: 500;
  padding: 10px 18px; border-radius: 10px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--primary-600); background: var(--gray-50); }
.nav-links a.active { color: var(--primary-600); font-weight: 600; background: var(--gray-50); }
.nav-cta { display: flex; align-items: center; gap: var(--sp-3); }
.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 42px; height: 42px; border-radius: 12px; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--gray-800); transition: transform .3s, opacity .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-drawer-cta { display: none; }
.nav-backdrop { display: none; }

@media (max-width: 880px) {
  .nav-links {
    position: fixed; top: 0; right: 0; bottom: 0; z-index: 99;
    width: min(80vw, 320px); background: #fff;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 88px 20px 24px;
    transform: translateX(105%); transition: transform .32s cubic-bezier(.22,.8,.3,1);
    box-shadow: -20px 0 60px rgba(20, 24, 33, .12); overflow-y: auto;
  }
  .nav-links.open { transform: none; }
  .nav-links a { font-size: 16px; padding: 13px 16px; border-radius: 12px; }
  .nav-links a.active { color: var(--primary-600); background: var(--primary-50); }
  .nav-drawer-cta { display: block; margin-top: 18px; }
  .nav-drawer-cta .btn { width: 100%; }
  .nav-backdrop {
    display: block; position: fixed; inset: 0; z-index: 98;
    background: rgba(20, 24, 33, .4); backdrop-filter: blur(2px);
    opacity: 0; pointer-events: none; transition: opacity .3s;
  }
  .nav-backdrop.show { opacity: 1; pointer-events: auto; }
  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer;
  transition: all .2s cubic-bezier(.22,.8,.3,1);
  white-space: nowrap; font-family: var(--font);
}
.btn:active { transform: translateY(0) scale(.98); }
.btn-primary { background: var(--primary-500); color: #fff; box-shadow: 0 4px 12px rgba(66, 99, 235, .22); }
.btn-primary:hover { background: var(--primary-600); box-shadow: 0 8px 20px rgba(66, 99, 235, .3); transform: translateY(-1px); }
.btn-gold { background: #f59f00; color: #fff; box-shadow: 0 4px 12px rgba(245, 159, 0, .22); }
.btn-gold:hover { background: #e69500; box-shadow: 0 8px 20px rgba(245, 159, 0, .3); transform: translateY(-1px); }
.btn-outline { background: #fff; color: var(--primary-600); border-color: var(--gray-200); }
.btn-outline:hover { border-color: var(--primary-300); background: var(--primary-50); transform: translateY(-1px); }
.btn-white { background: #fff; color: var(--primary-600); box-shadow: var(--shadow-1); }
.btn-white:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn-ghost-white { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.45); }
.btn-ghost-white:hover { background: rgba(255,255,255,.26); transform: translateY(-1px); }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none !important; }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Hero（浅色大气版） ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 124px 0 110px;
  background:
    radial-gradient(880px 420px at 88% -10%, rgba(66, 99, 235, .08), transparent 62%),
    radial-gradient(760px 400px at -6% 108%, rgba(66, 99, 235, .06), transparent 60%),
    linear-gradient(180deg, #fbfcff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--gray-100);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(66, 99, 235, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 99, 235, .045) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(70% 62% at 30% 20%, #000 0%, transparent 100%);
  mask-image: radial-gradient(70% 62% at 30% 20%, #000 0%, transparent 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero-inner { max-width: 620px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--gray-100);
  color: var(--gray-600); font-size: 14px; font-weight: 500;
  border-radius: 999px; padding: 7px 16px;
  box-shadow: var(--shadow-xs); margin-bottom: 26px;
  animation: heroIn .7s cubic-bezier(.22,.8,.3,1) both;
}
.hero-badge b { color: var(--primary-600); font-weight: 700; }
.hero h1 {
  font-size: clamp(38px, 5.2vw, 58px); font-weight: 800; line-height: 1.22;
  letter-spacing: 0; color: var(--gray-900); margin-bottom: 24px;
  animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .06s both;
}
.hero h1 .hl {
  background: linear-gradient(115deg, var(--primary-500) 0%, var(--primary-700) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero .hero-sub {
  font-size: clamp(16px, 1.8vw, 18px); line-height: 1.8; color: var(--gray-500);
  max-width: 560px; margin-bottom: 34px;
  animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .12s both;
}
.hero .hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 22px; animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .18s both; }
.hero .hero-note { font-size: 13.5px; color: var(--gray-400); margin-bottom: 34px; animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .24s both; }
.trust-row {
  display: flex; gap: 26px; flex-wrap: wrap; margin-bottom: 40px;
  animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .3s both;
}
.trust-row span { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--gray-600); }
.trust-row .tick {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0;
  background: var(--green-light); color: var(--green);
  display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 800;
}
@keyframes heroIn { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

/* 产品 Mockup */
.hero-visual { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); z-index: 3; width: 436px; }
.hero-visual::before {
  content: ""; position: absolute; inset: -60px -50px; z-index: -1;
  background: radial-gradient(circle, rgba(66,99,235,.16) 0%, transparent 65%);
  filter: blur(6px);
}
@media (max-width: 1120px) { .hero-visual { display: none; } }
.hv-wrap { position: relative; animation: floaty 7s ease-in-out infinite alternate; }
.hv-wrap::after {
  content: ""; position: absolute; inset: 14px -10px -14px 12px; z-index: -1;
  background: #fff; border: 1px solid var(--gray-100); border-radius: 20px;
  box-shadow: var(--shadow-2);
}
@keyframes floaty { from { transform: translateY(-7px); } to { transform: translateY(9px); } }
.hv-main {
  background: #fff; border-radius: 20px; padding: 24px;
  border: 1px solid var(--gray-100);
  box-shadow: 0 30px 70px rgba(20, 24, 33, .12), 0 4px 14px rgba(20, 24, 33, .05);
  color: var(--ink);
}
.hv-head { display: flex; align-items: center; gap: 6px; padding-bottom: 14px; border-bottom: 1px solid var(--gray-100); }
.hv-dot { width: 8px; height: 8px; border-radius: 50%; }
.hv-dot.d1 { background: #f87171; } .hv-dot.d2 { background: #fbbf24; } .hv-dot.d3 { background: #34d399; }
.hv-bolt { margin-left: auto; width: 26px; height: 26px; border-radius: 8px; background: var(--primary-50); color: var(--primary-600); display: flex; align-items: center; justify-content: center; font-size: 13px; }
.hv-lines { display: flex; flex-direction: column; gap: 10px; padding: 18px 2px 8px; }
.hv-lines i { display: block; height: 8px; border-radius: 99px; background: var(--gray-100); }
.hv-lines i:nth-child(1) { width: 78%; background: linear-gradient(90deg, #dbe4ff, #eef2ff); }
.hv-lines i:nth-child(2) { width: 92%; background: linear-gradient(90deg, #c9d6ff, #e8edff); }
.hv-lines i:nth-child(3) { width: 64%; background: linear-gradient(90deg, #b9c9ff, #e3e9ff); }
.hv-progress { height: 6px; border-radius: 99px; background: var(--gray-100); margin: 10px 0 14px; overflow: hidden; }
.hv-progress i { display: block; height: 100%; border-radius: 99px; background: var(--grad-brand); }
.hv-status { display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: var(--green); background: var(--green-light); border-radius: 9px; padding: 8px; }
.hv-mini {
  position: absolute; display: flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 14px; font-size: 20px;
  background: #fff; border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-2);
}
.hv-mini1 { top: -22px; left: -26px; }
.hv-mini2 { bottom: -18px; right: -22px; }
.hv-chip {
  position: absolute; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; font-size: 13px; font-weight: 700;
}
.hv-chip1 { top: 42%; right: -40px; width: 34px; height: 34px; background: var(--primary-50); color: var(--primary-600); box-shadow: var(--shadow-1); }
.hv-chip2 { bottom: 12%; left: -34px; width: 34px; height: 34px; background: var(--green-light); color: var(--green); box-shadow: var(--shadow-1); }

/* 数字栏 */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); max-width: 620px; animation: heroIn .7s cubic-bezier(.22,.8,.3,1) .36s both; }
.stat { text-align: center; padding: 0 18px; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 1px; background: var(--gray-100); }
.stat-num {
  font-size: 38px; font-weight: 800; line-height: 1.1; font-family: var(--font-num);
  color: var(--gray-900); font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 13px; color: var(--gray-500); margin-top: 6px; }
@media (max-width: 720px) { .stats-bar { gap: 12px; } .stat { min-width: 44%; padding: 0 12px; } .stat + .stat::before { display: none; } }

/* ---------- 通用区块 ---------- */
.section { padding: var(--sp-24) 0; }
@media (max-width: 720px) { .section { padding: var(--sp-16) 0; } }
.section.alt { background: var(--bg); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto var(--sp-12); }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--primary-600); font-size: 13px; font-weight: 600; letter-spacing: .1em;
  margin-bottom: var(--sp-4);
}
.section-head .eyebrow::before { content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--primary-400); }
.section-head .eyebrow::after { content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--primary-400); }
.section-head h2 { font-size: clamp(30px, 3.6vw, 42px); font-weight: 800; letter-spacing: 0; color: var(--gray-900); }
.section-head p { color: var(--gray-500); margin-top: 16px; font-size: 16px; line-height: 1.8; }

/* ---------- 卡片 ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 920px) { .value-grid { grid-template-columns: 1fr; } }
.value-card {
  background: #fff; border: 1px solid #e8ebf1;
  border-radius: var(--r-lg); padding: 34px 30px;
  box-shadow: var(--shadow-1);
  transition: transform .25s cubic-bezier(.22,.8,.3,1), box-shadow .25s, border-color .25s;
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-2); border-color: var(--primary-200); }
.value-icon {
  width: 58px; height: 58px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 27px; margin-bottom: 22px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.v-blue { background: var(--primary-50); }
.v-gold { background: var(--gold-light); }
.v-green { background: var(--green-light); }
.value-card h3 { font-size: 18.5px; font-weight: 700; margin-bottom: 12px; color: var(--gray-900); }
.value-card p { color: var(--gray-500); font-size: 14.5px; line-height: 1.8; }
.value-card .quote { font-size: 14px; color: var(--gray-500); line-height: 1.85; }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, 1fr); } }
.step {
  position: relative; text-align: center;
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--r-lg);
  padding: 26px 16px 22px; box-shadow: var(--shadow-xs);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-1); border-color: var(--gray-200); }
.step-num {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--gray-900); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; margin: 0 auto 16px;
  box-shadow: 0 6px 14px rgba(20, 24, 33, .12);
}
.step h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 7px; color: var(--gray-900); }
.step p { font-size: 12.5px; color: var(--gray-500); line-height: 1.7; }
@media (min-width: 981px) {
  .step:not(:last-child)::after {
    content: "→";
    position: absolute; right: -14px; top: 50%; transform: translateY(-50%); z-index: 2;
    width: 26px; height: 26px; border-radius: 50%;
    background: #fff; border: 1.5px solid var(--primary-200);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; color: var(--primary-600); font-weight: 800;
    box-shadow: var(--shadow-xs);
  }
}
.steps.steps-3 { grid-template-columns: repeat(3, 1fr); }
.steps.steps-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .steps.steps-3, .steps.steps-4 { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 功能宫格 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 920px) { .feature-grid { grid-template-columns: 1fr; } }
.feature {
  display: flex; gap: 16px;
  background: #fff; border: 1px solid #e8ebf1;
  border-radius: var(--r-md); padding: 24px; box-shadow: var(--shadow-1);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); border-color: var(--primary-200); }
.feature .f-icon {
  font-size: 23px; flex-shrink: 0; width: 48px; height: 48px; border-radius: 14px;
  background: var(--primary-50); display: flex; align-items: center; justify-content: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.feature h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 5px; color: var(--gray-900); }
.feature p { font-size: 13px; color: var(--gray-500); line-height: 1.75; }

/* ---------- 角色卡 ---------- */
.role-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
@media (max-width: 820px) { .role-grid { grid-template-columns: 1fr; } }
.role-card {
  background: #fff; border: 1px solid var(--gray-100);
  border-radius: var(--r-lg); padding: 30px; box-shadow: var(--shadow-xs);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.role-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-1); border-color: var(--gray-200); }
.role-card .role-tag {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary-600);
  background: var(--primary-50); border-radius: 999px; padding: 4px 13px; margin-bottom: 14px;
}
.role-card h3 { font-size: 19px; margin-bottom: 16px; color: var(--gray-900); }
.role-card .pain {
  color: #b3401f; font-size: 13.5px; line-height: 1.75;
  background: var(--red-light); border-left: 3px solid var(--red);
  border-radius: 0 10px 10px 0; padding: 11px 15px; margin-bottom: 14px;
}
.role-card .fix { font-size: 14.5px; color: var(--gray-600); line-height: 1.9; }
.role-card blockquote {
  border-left: 3px solid var(--primary-200); padding: 2px 0 2px 16px; margin-top: 18px;
  font-size: 14px; color: var(--gray-500); line-height: 1.9;
}

/* ---------- 套餐 ---------- */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
@media (max-width: 920px) { .plan-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; } }
.plan-card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--gray-100); border-radius: 20px;
  padding: 32px 26px 26px; box-shadow: var(--shadow-xs);
  transition: transform .28s cubic-bezier(.22,.8,.3,1), box-shadow .28s, border-color .28s;
}
.plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-1); border-color: var(--gray-200); }
.plan-card.popular {
  border: 2px solid var(--primary-400);
  box-shadow: 0 0 0 4px rgba(66, 99, 235, .06), 0 22px 52px rgba(66, 99, 235, .16);
  transform: scale(1.05);
}
.plan-card.popular:hover { transform: scale(1.05) translateY(-4px); box-shadow: 0 0 0 4px rgba(66, 99, 235, .08), 0 28px 60px rgba(66, 99, 235, .2); }
.plan-card .plan-name { font-size: 17px; font-weight: 800; color: var(--gray-900); display: flex; align-items: center; gap: 8px; }
.plan-card .plan-team { font-size: 13px; color: var(--gray-500); margin-top: 3px; }
.plan-card .plan-price { margin: 18px 0 2px; display: flex; align-items: baseline; gap: 6px; }
.plan-card .plan-price .num { font-size: 42px; font-weight: 800; font-family: var(--font-num); letter-spacing: -1px; color: var(--gray-900); line-height: 1; font-variant-numeric: tabular-nums; }
.plan-card.popular .plan-price .num { color: var(--primary-600); }
.plan-card .plan-price .unit { font-size: 14px; color: var(--gray-500); }
.plan-card .plan-quota {
  display: inline-block; align-self: flex-start;
  background: var(--primary-50); color: var(--primary-600);
  font-size: 13px; font-weight: 600; border-radius: 999px; padding: 5px 14px;
  margin: 14px 0 16px;
}
.plan-card .plan-desc { font-size: 13.5px; color: var(--gray-500); min-height: 42px; line-height: 1.7; }
.plan-card .plan-feats { list-style: none; margin: 14px 0 22px; flex: 1; }
.plan-card .plan-feats li { font-size: 13.5px; color: var(--gray-600); padding: 7px 0 7px 28px; position: relative; line-height: 1.65; }
.plan-card .plan-feats li::before {
  content: "✓"; position: absolute; left: 0; top: 9px;
  width: 18px; height: 18px; border-radius: 6px;
  background: var(--green-light); color: var(--green);
  font-size: 11px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.plan-card .btn { width: 100%; }
.plan-badge {
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
  background: var(--grad-brand); color: #fff; font-size: 12.5px; font-weight: 700;
  border-radius: 999px; padding: 6px 16px; white-space: nowrap;
  box-shadow: 0 8px 20px rgba(66, 99, 235, .3); letter-spacing: .02em;
  margin-bottom: 16px;
}
.plan-strip { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 24px; }
@media (max-width: 820px) { .plan-strip { grid-template-columns: 1fr; } }
.plan-strip-card {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: #fff; border: 1px solid #e8ebf1;
  border-radius: var(--r-lg); padding: 20px 24px;
  box-shadow: var(--shadow-xs);
  transition: background .2s, transform .2s, box-shadow .2s, border-color .2s;
}
.plan-strip-card:hover { background: var(--gray-25); transform: translateY(-2px); box-shadow: var(--shadow-1); border-color: var(--primary-200); }
.plan-strip-card .left .t { font-weight: 700; font-size: 15.5px; color: var(--gray-800); }
.plan-strip-card .left .d { font-size: 13px; color: var(--gray-500); margin-top: 3px; }

/* ---------- 对比表 ---------- */
.compare-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--gray-100); border-radius: var(--r-lg); box-shadow: var(--shadow-xs); }
.compare { width: 100%; border-collapse: collapse; min-width: 780px; }
.compare th, .compare td { padding: 14px 16px; text-align: center; font-size: 14px; border-bottom: 1px solid var(--gray-100); }
.compare th { background: var(--gray-50); font-weight: 600; color: var(--gray-700); font-size: 13.5px; }
.compare tbody tr:nth-child(even) td { background: var(--gray-25); }
.compare tbody tr:hover td { background: var(--primary-50); }
.compare td:first-child, .compare th:first-child { text-align: left; color: var(--gray-500); font-size: 13px; min-width: 150px; }
.compare tr:last-child td { border-bottom: 0; }
.compare .hl-cell { color: var(--primary-600); font-weight: 700; }
.compare .col-team { background: var(--primary-50); }
.compare .col-team th { background: var(--primary-500); color: #fff; font-weight: 700; }
.compare .col-team td { background: rgba(238, 242, 255, .4); }
.compare tbody tr:nth-child(even) .col-team td { background: rgba(238, 242, 255, .65); }
.compare td:not(:first-child) { color: var(--gray-600); }

/* ---------- 购买页 ---------- */
.checkout-grid { display: grid; grid-template-columns: 392px 1fr; gap: 26px; align-items: start; }
@media (max-width: 920px) { .checkout-grid { grid-template-columns: 1fr; } }
.order-box {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--r-lg);
  padding: 26px; box-shadow: var(--shadow-1); position: sticky; top: 92px;
}
.order-box h3 { font-size: 16px; margin-bottom: 16px; color: var(--gray-900); }
.order-row { display: flex; justify-content: space-between; padding: 11px 0; font-size: 14px; border-bottom: 1px dashed var(--gray-100); }
.order-row .k { color: var(--gray-500); }
.order-row .v { font-weight: 600; color: var(--gray-800); }
.order-total { display: flex; justify-content: space-between; align-items: baseline; padding: 18px 0 6px; }
.order-total .t { font-size: 15px; font-weight: 700; color: var(--gray-900); }
.order-total .p { font-size: 32px; font-weight: 800; font-family: var(--font-num); color: var(--primary-600); }

/* 表单 */
.form { background: #fff; border: 1px solid var(--gray-100); border-radius: var(--r-lg); padding: 30px; box-shadow: var(--shadow-1); }
.form h3 { font-size: 18px; margin-bottom: 8px; color: var(--gray-900); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 13.5px; font-weight: 600; color: var(--gray-700); }
.form-group label .req { color: var(--red); }
.form-group input, .form-group select, .form-group textarea {
  font-family: var(--font); font-size: 15px; padding: 12px 15px;
  border: 1.5px solid var(--gray-200); border-radius: 12px;
  background: #fff; color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary-400); box-shadow: var(--shadow-ring);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--gray-300); }
.form-check { display: flex; align-items: flex-start; gap: 9px; font-size: 13px; color: var(--gray-500); margin-top: 8px; }
.form-check input { margin-top: 4px; accent-color: var(--primary-500); }
.form .btn { margin-top: 24px; }
.form-note { font-size: 12.5px; color: var(--gray-400); margin-top: 14px; text-align: center; }

/* 支付二维码占位 */
.pay-box {
  background: var(--gray-25); border: 1.5px dashed var(--gray-200);
  border-radius: var(--r-lg); padding: 24px; text-align: center; margin-bottom: 24px; position: relative;
}
.pay-box .pay-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary-500); color: #fff; font-size: 12px; font-weight: 700;
  border-radius: 999px; padding: 4px 14px; white-space: nowrap; box-shadow: var(--shadow-brand);
}
.pay-box .qr {
  width: 168px; height: 168px; margin: 16px auto;
  border-radius: 14px; background: #fff; border: 1px solid var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--gray-400); box-shadow: var(--shadow-xs);
}
.pay-box .t { font-weight: 700; font-size: 15.5px; color: var(--gray-900); }
.pay-box .d { font-size: 13px; color: var(--gray-500); margin-top: 5px; line-height: 1.7; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--gray-100);
  border-radius: var(--r-md); margin-bottom: 10px; overflow: hidden;
  transition: box-shadow .25s, border-color .25s;
}
.faq-item:hover { border-color: var(--gray-200); }
.faq-item.open { box-shadow: var(--shadow-1); border-color: var(--gray-200); }
.faq-q {
  padding: 19px 24px; font-weight: 600; font-size: 15.5px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  color: var(--gray-800); user-select: none;
}
.faq-q .arr {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  background: var(--gray-50); color: var(--gray-500);
  display: flex; align-items: center; justify-content: center; font-size: 12px;
  transition: transform .3s cubic-bezier(.22,.8,.3,1), background .2s, color .2s;
}
.faq-item.open .faq-q .arr { transform: rotate(180deg); background: var(--primary-500); color: #fff; }
.faq-a { display: none; padding: 0 24px 20px; font-size: 14.5px; color: var(--gray-600); line-height: 1.9; }
.faq-item.open .faq-a { display: block; animation: fadeIn .3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
.faq-list h3 { font-size: 17px; margin: 28px 0 14px; color: var(--gray-900); display: flex; align-items: center; gap: 8px; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, #1a2130 0%, #131823 100%);
  color: #aab2c2; padding: 64px 0 28px;
}
.site-footer::before {
  content: ""; position: absolute; width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(66, 99, 235, .16), transparent 62%);
  top: -260px; right: -140px; pointer-events: none;
}
.footer-grid { position: relative; display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 44px; }
@media (max-width: 920px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-logo { display: flex; align-items: center; gap: 11px; }
.footer-logo img.footer-logo-img {
  width: 40px; height: 40px; border-radius: 11px; object-fit: cover;
  box-shadow: 0 0 0 2px rgba(255,255,255,.16), 0 6px 16px rgba(0,0,0,.35);
}
.footer-logo .logo-text { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: .01em; }
.footer-brand .slogan { margin-top: 16px; font-size: 14px; opacity: .8; max-width: 320px; line-height: 1.85; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; color: #9aa2b1; font-size: 14px; padding: 6.5px 0; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  position: relative; border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 56px; padding-top: 26px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: #8a93a6;
}

/* ---------- 内页 Hero（浅色） ---------- */
.page-hero {
  position: relative; overflow: hidden;
  padding: 84px 0 64px;
  background:
    radial-gradient(760px 380px at 88% -20%, rgba(66, 99, 235, .07), transparent 62%),
    linear-gradient(180deg, #fbfcff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--gray-100);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(30px, 4vw, 42px); font-weight: 800; color: var(--gray-900); letter-spacing: 0; }
.page-hero p { color: var(--gray-500); margin-top: 14px; max-width: 660px; font-size: 16px; line-height: 1.8; }
.breadcrumb { font-size: 14px; color: var(--gray-400); margin-bottom: 16px; }
.breadcrumb a { color: var(--gray-600); }
.breadcrumb a:hover { color: var(--primary-600); text-decoration: underline; }

/* ---------- CTA 横幅（保留品牌色，作为全站唯一点睛） ---------- */
.cta-band {
  position: relative; overflow: hidden; text-align: center; color: #fff;
  background:
    radial-gradient(600px 320px at 85% -30%, rgba(255,255,255,.14), transparent 62%),
    radial-gradient(520px 300px at 10% 120%, rgba(255,255,255,.08), transparent 62%),
    linear-gradient(135deg, #4a67f2 0%, #4263eb 52%, #3452d8 100%);
  border-radius: 24px; padding: 72px 24px;
  box-shadow: 0 24px 60px rgba(66, 99, 235, .25);
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(70% 80% at 50% 0%, #000 0%, transparent 90%);
  mask-image: radial-gradient(70% 80% at 50% 0%, #000 0%, transparent 90%);
}
.cta-band > * { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
.cta-band p { opacity: .92; margin: 14px 0 30px; font-size: 16px; }
.cta-band .cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-band .btn-gold { background: #fff; color: var(--primary-600); box-shadow: 0 10px 26px rgba(20, 30, 90, .25); }
.cta-band .btn-gold:hover { background: #f2f5ff; transform: translateY(-1px); box-shadow: 0 14px 30px rgba(20, 30, 90, .3); }

.notice {
  background: var(--gold-light); border: 1px solid #ffe3b3; color: #7a5b00;
  border-radius: 12px; padding: 15px 19px; font-size: 14px; line-height: 1.8;
}
.notice.blue { background: var(--primary-50); border-color: var(--primary-100); color: var(--primary-800); }

.legal { max-width: 780px; margin: 0 auto; }
.legal h2 { font-size: 20px; margin: 36px 0 14px; color: var(--gray-900); }
.legal p, .legal li { font-size: 14.5px; color: var(--gray-600); margin-bottom: 10px; line-height: 1.9; }
.legal ul { padding-left: 22px; }

/* 移动端吸底 CTA */
.mobile-cta {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-top: 1px solid var(--gray-100);
  padding: 10px 16px; gap: 12px; box-shadow: 0 -8px 24px rgba(20, 24, 33, .06);
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
}
.mobile-cta .btn { flex: 1; }
@media (max-width: 880px) { .mobile-cta { display: flex; } body { padding-bottom: 70px; } body.no-pad { padding-bottom: 0; } }

/* 动画 */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity .55s cubic-bezier(.22,.8,.3,1), transform .55s cubic-bezier(.22,.8,.3,1); will-change: opacity, transform; }
.fade-up.in { opacity: 1; transform: none; }
.value-grid .value-card:nth-child(2), .feature-grid .feature:nth-child(2), .role-grid .role-card:nth-child(2) { transition-delay: .07s; }
.value-grid .value-card:nth-child(3), .feature-grid .feature:nth-child(3), .role-grid .role-card:nth-child(3) { transition-delay: .14s; }
.value-grid .value-card:nth-child(4) { transition-delay: .07s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .fade-up { opacity: 1; transform: none; }
}