/* ============================================================
   LawGO 官网设计规范 —— 淡紫色系 × 苹果官网极简风格
   主色: #805AD5  |  渐变: 紫 #805AD5 → 蓝 #4C6FFF
   ============================================================ */
:root {
  --purple: #805AD5;
  --purple-deep: #6B46C1;
  --purple-light: #9F7AEA;
  --blue: #4C6FFF;
  --lav-50: #FAF8FF;
  --lav-100: #F3EFFF;
  --lav-200: #E9E2FD;
  --lav-300: #D6CBF9;
  --ink: #1D1D1F;
  --ink-2: #3A3A3C;
  --gray: #6E6E73;
  --gray-2: #86868B;
  --line: #E8E6F0;
  --grad: linear-gradient(135deg, #805AD5 0%, #4C6FFF 100%);
  --grad-soft: linear-gradient(135deg, #F3EFFF 0%, #EDF1FF 100%);
  --shadow-card: 0 4px 24px rgba(128, 90, 213, 0.08), 0 1px 4px rgba(29, 29, 31, 0.04);
  --shadow-float: 0 24px 80px rgba(107, 70, 193, 0.16), 0 8px 24px rgba(29, 29, 31, 0.06);
  --radius: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }

body {
  font-family: -apple-system, "SF Pro SC", "SF Pro Display", "PingFang SC",
    "Noto Sans CJK SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: #FFFFFF;
  line-height: 1.6;
  overflow-x: hidden;
}

.wrap { width: 1200px; margin: 0 auto; }

/* ---------- LawGO 标识 ---------- */
.logo { display: inline-flex; align-items: baseline; font-weight: 800; letter-spacing: -0.02em; user-select: none; }
.logo .law { color: #111113; font-weight: 800; }
.logo .go {
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  position: relative;
}
.logo.lg { font-size: 34px; }
.logo.md { font-size: 26px; }

/* ---------- 顶部导航（苹果风格半透明毛玻璃） ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(251, 250, 255, 0.82);
  border-bottom: 1px solid rgba(232, 230, 240, 0.7);
}
.nav-inner {
  width: 1200px; margin: 0 auto; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-links { display: flex; gap: 44px; align-items: center; }
.nav-links a {
  font-size: 14px; color: var(--ink-2); text-decoration: none;
  letter-spacing: 0.01em; transition: color .2s;
}
.nav-links a:hover { color: var(--purple-deep); }
.nav-links a.active { color: var(--purple-deep); font-weight: 600; }
.nav-cta {
  font-size: 13px; font-weight: 600; color: #fff !important;
  background: var(--grad); padding: 7px 18px; border-radius: 980px;
  box-shadow: 0 4px 14px rgba(128, 90, 213, 0.28);
}

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-size: 15px; font-weight: 700; letter-spacing: 0.12em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 18px;
}
h1.hero-title {
  font-size: 64px; line-height: 1.15; font-weight: 700;
  letter-spacing: -0.022em; color: var(--ink);
}
h2.section-title {
  font-size: 44px; line-height: 1.2; font-weight: 700;
  letter-spacing: -0.02em; color: var(--ink);
}
.lead { font-size: 19px; color: var(--gray); line-height: 1.75; }
.center { text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 16px; font-weight: 600; text-decoration: none;
  padding: 14px 30px; border-radius: 980px; transition: transform .2s, box-shadow .2s;
}
.btn-primary { color: #fff; background: var(--grad); box-shadow: 0 8px 24px rgba(128, 90, 213, 0.32); }
.btn-ghost { color: var(--purple-deep); background: #fff; border: 1.5px solid var(--lav-300); }
.btn .arr { font-weight: 500; }

/* ---------- 区块 ---------- */
.section { padding: 110px 0; }
.section.tint { background: var(--lav-50); }
.section-head { max-width: 760px; margin: 0 auto 72px; text-align: center; }
.section-head .lead { margin-top: 20px; }

/* ---------- Hero 光斑背景 ---------- */
.hero {
  position: relative; text-align: center;
  padding: 96px 0 80px; overflow: hidden;
  background: linear-gradient(180deg, #FBFAFF 0%, #F6F3FF 55%, #FFFFFF 100%);
}
.hero .blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55; pointer-events: none;
}
.blob.b1 { width: 560px; height: 560px; background: #DCD0FB; top: -180px; left: -120px; }
.blob.b2 { width: 480px; height: 480px; background: #D3DCFF; top: -100px; right: -140px; }
.blob.b3 { width: 420px; height: 420px; background: #EFE7FF; bottom: -220px; left: 38%; }
.hero > .wrap { position: relative; z-index: 2; }
.hero .lead { max-width: 680px; margin: 26px auto 0; }
.hero-actions { margin-top: 40px; display: flex; gap: 16px; justify-content: center; }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--purple-deep);
  background: rgba(255,255,255,0.75); border: 1px solid var(--lav-200);
  padding: 7px 16px; border-radius: 980px; margin-bottom: 28px;
  box-shadow: 0 2px 10px rgba(128,90,213,.08);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--grad); }

/* ---------- 设备 / 浏览器样机 ---------- */
.browser {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-float); border: 1px solid rgba(232,230,240,.9);
}
.browser-bar {
  height: 44px; display: flex; align-items: center; gap: 8px;
  padding: 0 18px; background: #FBFAFD; border-bottom: 1px solid var(--line);
}
.browser-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.browser-bar i:nth-child(1) { background: #FF5F57; }
.browser-bar i:nth-child(2) { background: #FEBC2E; }
.browser-bar i:nth-child(3) { background: #28C840; }
.browser-bar .url {
  margin-left: 14px; flex: 0 1 340px; height: 26px; border-radius: 8px;
  background: #F1EFF6; color: var(--gray-2); font-size: 12px;
  display: flex; align-items: center; padding: 0 12px;
}
.browser img { width: 100%; display: block; }

.phone {
  width: 300px; border-radius: 44px; background: #fff; padding: 10px;
  box-shadow: var(--shadow-float); border: 1px solid rgba(232,230,240,.9);
  position: relative;
}
.phone img { width: 100%; border-radius: 34px; display: block; }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-float); }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--grad-soft); display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.card .icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.01em; }
.card p { font-size: 14.5px; color: var(--gray); line-height: 1.7; }

/* ---------- 特性左右布局 ---------- */
.feature { display: flex; align-items: center; gap: 80px; }
.feature.rev { flex-direction: row-reverse; }
.feature .text { flex: 1; }
.feature .media { flex: 1.15; }
.feature .text h3 { font-size: 36px; font-weight: 700; letter-spacing: -0.018em; line-height: 1.25; margin: 14px 0 18px; }
.feature .text .lead { font-size: 17px; }
.checks { margin-top: 28px; display: flex; flex-direction: column; gap: 16px; }
.checks li { list-style: none; display: flex; gap: 12px; font-size: 15px; color: var(--ink-2); }
.checks li b { font-weight: 700; color: var(--ink); }
.checks .tick {
  flex: 0 0 22px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--grad); color: #fff; font-size: 12px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; margin-top: 2px;
}

.tag {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--purple-deep);
  background: var(--lav-100); padding: 6px 14px; border-radius: 980px;
}

/* ---------- 数据 ---------- */
.stat { text-align: center; }
.stat .num {
  font-size: 52px; font-weight: 700; letter-spacing: -0.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat .label { font-size: 15px; color: var(--gray); margin-top: 6px; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative; overflow: hidden; text-align: center;
  background: linear-gradient(135deg, #6B46C1 0%, #805AD5 45%, #4C6FFF 100%);
  border-radius: 32px; padding: 88px 60px; color: #fff;
  box-shadow: 0 30px 90px rgba(107, 70, 193, 0.35);
}
.cta-band h2 { font-size: 42px; font-weight: 700; letter-spacing: -0.018em; }
.cta-band p { margin-top: 16px; font-size: 17px; color: rgba(255,255,255,.85); }
.cta-band .btn { margin-top: 36px; }
.btn-white { background: #fff; color: var(--purple-deep); box-shadow: 0 12px 32px rgba(0,0,0,.18); }
.cta-band .glow { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .4; }
.cta-band .g1 { width: 420px; height: 420px; background: #B794F6; top: -160px; right: -80px; }
.cta-band .g2 { width: 360px; height: 360px; background: #7F9CF5; bottom: -160px; left: -60px; }

/* ---------- 页脚 ---------- */
.footer { background: #FBFAFD; border-top: 1px solid var(--line); padding: 64px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer h4 { font-size: 14px; font-weight: 700; margin-bottom: 18px; }
.footer a, .footer p { display: block; font-size: 13.5px; color: var(--gray); text-decoration: none; line-height: 2.1; }
.footer .brand-note { margin-top: 16px; max-width: 300px; }
.footer-bottom {
  margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; font-size: 12.5px; color: var(--gray-2);
}

/* ---------- 品牌 LOGO 图片 ---------- */
.logo-img { height: 26px; width: auto; display: inline-block; }
.logo-img.xl { height: 92px; }

/* ---------- 创始人照片 ---------- */
.founder-photo {
  width: 108px; height: 108px; border-radius: 32px; object-fit: cover;
  box-shadow: 0 12px 32px rgba(107, 70, 193, 0.18);
  border: 3px solid #fff; margin-bottom: 24px;
}

/* ---------- 品牌理念（Slogan 大字区） ---------- */
.slogan-big {
  font-size: 56px; font-weight: 700; letter-spacing: 0.04em; line-height: 1.2;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 1920px 大屏适配：等比放大 1440 设计稿 ---------- */
@media (min-width: 1700px) {
  body { zoom: 1.3333; }
}

/* ---------- 手机端适配（≤820px）：内容不变，布局重排 ---------- */
.menu-btn { display: none; }
.mobile-menu { display: none; }

@media (max-width: 820px) {
  .wrap, .nav-inner { width: auto; padding-left: 22px; padding-right: 22px; }

  /* 导航：收起为汉堡菜单，保留注册按钮 */
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-links { gap: 12px; }
  .menu-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 12px;
    border: 1px solid var(--lav-200); background: #fff; cursor: pointer;
  }
  .menu-btn svg { width: 18px; height: 18px; }
  .mobile-menu {
    display: block; position: sticky; top: 64px; z-index: 99;
    background: rgba(251, 250, 255, 0.97);
    backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .32s ease;
  }
  body.menu-open .mobile-menu { max-height: 420px; }
  .mobile-menu a {
    display: block; padding: 15px 26px; font-size: 15px;
    color: var(--ink-2); text-decoration: none; border-top: 1px solid var(--line);
  }
  .mobile-menu a.active { color: var(--purple-deep); font-weight: 600; }

  /* 排版缩放 */
  h1.hero-title { font-size: 38px; letter-spacing: -0.018em; }
  h2.section-title { font-size: 29px; }
  .page-hero { padding: 64px 0 56px; }
  .page-hero h1 { font-size: 33px; }
  .lead { font-size: 16px; }
  .lead br { display: none; }
  .hero { padding: 60px 0 56px; }
  .hero .lead { margin-top: 20px; }
  .hero-actions { flex-direction: column; align-items: center; gap: 14px; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 44px; }
  .slogan-big { font-size: 34px; }
  .eyebrow { font-size: 13px; }

  /* 栅格全部转单列 */
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }

  /* 左右特性区转纵向 */
  .feature, .feature.rev { flex-direction: column; gap: 40px; align-items: stretch; }
  .feature .text h3 { font-size: 26px !important; }
  .feature .text h3 br { display: none; }
  .feature .media { width: 100%; }
  .checks li { font-size: 14px; }
  .stat .num { font-size: 34px !important; }

  /* 样机与卡片 */
  .logo-img.xl { width: 78%; height: auto; }
  .phone { width: 262px; margin: 0 auto; }
  .card { padding: 28px 24px; }
  .browser-bar .url { flex: 1; min-width: 0; }

  /* CTA 与页脚 */
  .cta-band { padding: 56px 26px; border-radius: 24px; }
  .cta-band h2 { font-size: 27px; }
  .footer { padding: 48px 0 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: center; gap: 8px; text-align: center; }
}

/* ---------- 页面 Hero（内页） ---------- */
.page-hero {
  position: relative; overflow: hidden; text-align: center;
  padding: 100px 0 90px;
  background: linear-gradient(180deg, #FBFAFF 0%, #F5F2FF 60%, #FFFFFF 100%);
}
.page-hero h1 { font-size: 56px; font-weight: 700; letter-spacing: -0.022em; line-height: 1.15; }
.page-hero .lead { max-width: 700px; margin: 24px auto 0; }

/* ---------- 知识库公式卡 ---------- */
.formula-card { padding: 48px 40px; text-align: center; }
.formula-row { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.formula-box { background: var(--lav-100); border: 1px solid var(--lav-200); border-radius: 16px; padding: 22px 26px; }
.formula-box .fi { font-size: 26px; }
.formula-box .ft { font-size: 15px; font-weight: 700; margin-top: 8px; }
.formula-plus { font-size: 24px; color: var(--purple-light); font-weight: 300; }
.formula-arrow { margin: 30px 0 0; font-size: 22px; color: var(--purple-light); }
.formula-result { margin-top: 14px; background: var(--grad); color: #fff; border-radius: 18px; padding: 24px 20px; box-shadow: 0 16px 40px rgba(128,90,213,.3); }
.formula-result .fr-t { font-size: 20px; font-weight: 700; }
.formula-result .fr-s { font-size: 13.5px; color: rgba(255,255,255,.85); margin-top: 6px; }

/* ---------- 移动端修正（置于文件末尾，确保覆盖后续基础样式） ---------- */
@media (max-width: 820px) {
  /* 内页 Hero：字号收敛、自然换行 */
  .page-hero { padding: 58px 0 50px; }
  .page-hero h1 { font-size: 29px; letter-spacing: -0.018em; line-height: 1.3; }
  .page-hero h1 br { display: none; }
  .page-hero .lead { margin-top: 18px; }

  /* 公式卡：知识库+提示词+Skills 三项并排一行 */
  .formula-card { padding: 30px 14px; }
  .formula-row { flex-wrap: nowrap; gap: 6px; }
  .formula-box { flex: 1 1 0; min-width: 0; padding: 14px 6px; border-radius: 13px; }
  .formula-box .fi { font-size: 20px; }
  .formula-box .ft { font-size: 12.5px; margin-top: 6px; white-space: nowrap; }
  .formula-plus { font-size: 15px; }
  .formula-arrow { margin-top: 22px; font-size: 18px; }
  .formula-result { margin-top: 12px; padding: 18px 14px; border-radius: 15px; }
  .formula-result .fr-t { font-size: 16.5px; }
  .formula-result .fr-s { font-size: 12px; margin-top: 5px; }
}

/* ---------- 法律条款页 ---------- */
.legal { padding: 24px 0 96px; }
.legal-wrap { width: min(780px, calc(100% - 48px)); margin: 0 auto; }
.legal-notice {
  background: var(--lav-100); border: 1px solid var(--lav-200);
  border-radius: 16px; padding: 22px 26px; margin-bottom: 40px;
}
.legal-notice p { margin-bottom: 10px; }
.legal-notice p:last-child { margin-bottom: 0; }
.legal h2 {
  font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em;
  margin: 48px 0 16px; padding-left: 14px; border-left: 4px solid var(--purple);
}
.legal h3 { font-size: 15.5px; font-weight: 700; color: var(--ink); margin: 28px 0 10px; }
.legal h4 { font-size: 14px; font-weight: 700; color: var(--ink-2); margin: 20px 0 8px; }
.legal p { font-size: 14px; color: var(--ink-2); line-height: 1.95; margin-bottom: 14px; }
.legal p strong, .legal li strong { color: var(--ink); }
.legal ul { margin: 0 0 16px; padding: 0; list-style: none; }
.legal li {
  position: relative; font-size: 14px; color: var(--ink-2);
  line-height: 1.95; padding-left: 20px; margin-bottom: 8px;
}
.legal li::before {
  content: ""; position: absolute; left: 4px; top: 13px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--purple-light);
}
.legal ol { margin: 0 0 16px; padding-left: 22px; }
.legal ol li { padding-left: 6px; }
.legal ol li::before { display: none; }
.legal .contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 26px; box-shadow: var(--shadow-card);
}
.legal .contact-card p { margin-bottom: 8px; }
@media (max-width: 820px) {
  .legal { padding: 12px 0 72px; }
  .legal h2 { font-size: 18px; margin: 38px 0 14px; }
  .legal-wrap { width: calc(100% - 44px); }
}


/* ===== 导航品牌区：logo + 口号 ===== */
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand-slogan { font-size: 15px; font-weight: 800; color: var(--ink); letter-spacing: .04em; white-space: nowrap; }

/* ===== 首屏强调副文案 ===== */
.hero .lead-em { margin-top: 26px; font-size: 23px; font-weight: 800; color: var(--purple-deep); line-height: 1.9; letter-spacing: .01em; }

/* ===== 系统截图轮播 ===== */
.carousel .slides { position: relative; aspect-ratio: 1920 / 1083; background: #fff; }
.carousel .slide {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  opacity: 0; transition: opacity .7s ease; pointer-events: none;
}
.carousel .slide.active { opacity: 1; pointer-events: auto; }
.carousel .dots { display: flex; justify-content: center; gap: 10px; margin-top: 26px; }
.carousel .dots .dot {
  width: 9px; height: 9px; border-radius: 999px; border: none; cursor: pointer;
  background: #D6CBF9; padding: 0; transition: all .3s ease;
}
.carousel .dots .dot:hover { background: var(--purple-light); }
.carousel .dots .dot.active { width: 30px; background: var(--purple); }

@media (max-width: 820px) {
  .brand-slogan { display: none; }
  .hero .lead { font-size: 15px; line-height: 1.9; }
  .hero .lead br { display: block; }
  .hero .lead-em { font-size: 19px; margin-top: 20px; }
  .carousel .dots { margin-top: 18px; gap: 8px; }
  .carousel .dots .dot { width: 8px; height: 8px; }
  .carousel .dots .dot.active { width: 24px; }

  /* ===== 法律条款页手机端适配 ===== */
  .legal { padding: 12px 0 72px; }
  .legal-wrap { width: calc(100% - 32px); }
  .legal-notice { padding: 18px 18px; border-radius: 14px; margin-bottom: 32px; font-size: 13px; }
  .legal h2 { font-size: 17px; margin: 36px 0 12px; padding-left: 11px; border-left-width: 3px; }
  .legal h3 { font-size: 15px; }
  .legal h4 { font-size: 14px; }
  .legal p, .legal li { font-size: 13px; line-height: 1.9; }
}