/* ============================================================
   小豆AI助手 官网 · 设计系统 v4
   统一的高级视觉语言：Ink 深色基底 + 品牌蓝紫渐变 + 琥珀点缀
   v4：去掉 Google Fonts（国内加载慢、阻塞首屏），全站改系统字体；
       导航改通栏；对比度提到 WCAG AA。
   ============================================================ */

:root {
  /* 品牌色 */
  --brand: #2563eb;
  --brand-strong: #1d4ed8;
  --brand-deep: #1e3a8a;
  --brand-soft: #eff6ff;
  --brand-line: #dbeafe;
  --brand-grad: linear-gradient(135deg, #2563eb 0%, #4f6ef7 52%, #7c5cf6 100%);
  --violet: #7c5cf6;

  /* 强调色 */
  --gold: #8a5d10;
  --gold-soft: #fdf6e9;
  --gold-line: #f0e0c0;

  /* 中性色 */
  --ink: #0b1220;
  --ink-2: #111b2e;
  --text: #16202f;
  --text-2: #4b5768;
  --text-3: #5f6b7e;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-alt: #f1f4f9;
  --line: #e6eaf1;
  --line-strong: #d5dce7;

  /* 兼容旧变量名 */
  --primary: var(--brand);
  --primary-dark: var(--brand-strong);
  --primary-light: var(--brand-soft);
  --accent: var(--gold);
  --accent-light: var(--gold-soft);
  --text-muted: var(--text-2);
  --text-light: var(--text-3);
  --bg-subtle: var(--bg-soft);
  --border: var(--line);

  /* 圆角 / 阴影 */
  --r-sm: 10px;
  --r: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --radius: var(--r);
  --radius-lg: var(--r-lg);
  --sh-1: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
  --sh-2: 0 2px 6px rgba(16, 24, 40, .04), 0 12px 28px -8px rgba(16, 24, 40, .10);
  --sh-3: 0 4px 10px rgba(16, 24, 40, .05), 0 28px 60px -18px rgba(16, 24, 40, .18);
  --sh-brand: 0 10px 26px -10px rgba(37, 99, 235, .55);
  --shadow: var(--sh-1);
  --shadow-lg: var(--sh-3);

  /* 字体 */
  /* 系统字体：苹果 PingFang / 鸿蒙 HarmonyOS Sans / 小米 MiSans / Windows 微软雅黑。
     --font-serif 保留变量名兼容旧选择器，标题统一走无衬线。 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'PingFang SC', 'HarmonyOS Sans SC', 'MiSans', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: var(--font-sans);
  --font-num: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --maxw: 1200px;
}

/* ========= RESET ========= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
::selection { background: var(--brand-line); color: var(--brand-deep); }

/* ========= 布局工具 ========= */
/* 内容栏统一：外框 1200（含 24px 槽），内容实宽 1152。
   首页 .container、子页 .page-hero / .section / .content-band / .cta-section
   全部对齐到这条中轴，深色底的 .section.muted 只有背景通栏。 */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 普通区块：外框 1200（含 24px 槽），内容实宽 1152 —— 全站统一这一条中轴。
   首页没有 <main>，所以选择器不能加 main > 前缀。 */
.section,
.page-hero {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section { padding-top: 96px; padding-bottom: 96px; }
.page-hero { padding-top: 76px; padding-bottom: 56px; }

/* 通栏底色的区块：背景铺满视口，内容仍落在同一条 1152 中轴上 */
.section.muted,
.tools-section.section {
  max-width: none;
  padding-left: 24px;
  padding-right: 24px;
}
.section.muted > *,
.tools-section.section > * {
  max-width: calc(var(--maxw) - 48px);
  margin-inline: auto;
  padding-inline: 0;
}
.section.muted { background: var(--bg-soft); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 44px; flex-wrap: wrap; }

.eyebrow, .section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}
.section-label {
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  padding: 5px 13px;
  border-radius: 999px;
  letter-spacing: .12em;
}
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 700; line-height: 1.3; letter-spacing: -.015em; color: var(--text); }
.section-title, .section h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 16px; }
.section-desc {
  font-size: 16px;
  color: var(--text-2);
  max-width: 760px;
  line-height: 1.9;
}
.section-desc strong { color: var(--text); font-weight: 700; }
.text-center { text-align: center; }
.center-head { text-align: center; }
.center-head .section-desc { margin-inline: auto; }

/* ========= 按钮 ========= */
.btn, .btn-primary, .btn-ghost, .btn-nav, .header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: var(--r-sm);
  transition: transform .18s cubic-bezier(.2,.8,.3,1), box-shadow .2s, background .2s, border-color .2s, color .2s;
  white-space: nowrap;
}
.btn-primary, .btn.primary, .header-cta, .btn-nav {
  background: var(--brand-grad);
  color: #fff;
  box-shadow: var(--sh-brand);
}
.btn-primary:hover, .btn.primary:hover, .header-cta:hover, .btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px -12px rgba(37, 99, 235, .62);
}
.btn-ghost, .btn.ghost, .btn.outline {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line-strong);
  box-shadow: var(--sh-1);
}
.btn-ghost:hover, .btn.ghost:hover, .btn.outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
}
.btn.dark {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 12px 28px -12px rgba(11, 18, 32, .7);
}
.btn.dark:hover { transform: translateY(-2px); background: var(--ink-2); }
.btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 12px; }
.btn-nav, .header-cta { padding: 10px 20px; font-size: 14px; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; color: var(--brand); font-weight: 800; font-size: 14px; }
.link-arrow:hover { gap: 10px; }

/* ========= 顶部导航（统一） ========= */
.site-header, .navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(230, 234, 241, .9);
}
.site-header {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: none;
  margin: 0;
  /* 通栏背景，内容对齐 1152 中轴 */
  padding: 0 max(24px, calc((100% - var(--maxw)) / 2 + 24px));
  height: 68px;
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand, .logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  flex-shrink: 0;
}
.brand-mark, .logo-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--brand-grad);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  font-family: var(--font-serif);
  box-shadow: var(--sh-brand);
}
img.brand-mark { display: block; padding: 0; background: none; border-radius: 50%; object-fit: cover; box-shadow: 0 6px 16px -6px rgba(37, 99, 235, .55); }
.logo-icon { background: none; box-shadow: none; font-size: 24px; width: auto; height: auto; }
.logo-text em, .brand em { font-style: normal; color: var(--brand); }
.brand-badge {
  margin-left: 2px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  padding: 2px 8px;
  border-radius: 999px;
}

.site-nav, .nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: auto;
  flex-wrap: wrap;
}
.site-nav a, .nav-links a {
  position: relative;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  padding: 8px 12px;
  border-radius: 8px;
  transition: color .18s, background .18s;
}
.site-nav a:hover, .nav-links a:hover { color: var(--brand); background: var(--brand-soft); }
.site-nav a.active, .nav-links a.active { color: var(--brand); font-weight: 800; }
.nav-tag {
  margin-left: 5px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .04em;
  color: #fff;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  padding: 1px 6px;
  border-radius: 999px;
  vertical-align: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.nav-toggle {
  display: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-2);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 7px 12px;
}

/* ========= HERO ========= */
.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 24px 88px;
  text-align: center;
  background: linear-gradient(180deg, #fbfcff 0%, #ffffff 62%);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.hero-blob.b1 { width: 520px; height: 520px; left: -180px; top: -220px; background: radial-gradient(circle, #c7dbff, transparent 70%); }
.hero-blob.b2 { width: 480px; height: 480px; right: -160px; top: -140px; background: radial-gradient(circle, #ffe9c4, transparent 70%); }
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(37,99,235,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(37,99,235,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000, transparent 78%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000, transparent 78%);
}
.hero-content { position: relative; max-width: 980px; margin: 0 auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-deep);
  background: rgba(255,255,255,.8);
  border: 1px solid var(--brand-line);
  padding: 7px 16px;
  border-radius: 999px;
  box-shadow: var(--sh-1);
  margin-bottom: 26px;
}
.hero-title, .hero h1 {
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.22;
  letter-spacing: -.02em;
  margin-bottom: 22px;
}
.hero-accent {
  background: linear-gradient(120deg, #2563eb 0%, #4f46e5 50%, #7c3aed 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.95;
  max-width: 780px;
  margin: 0 auto 34px;
}
.hero-desc strong { color: var(--text); font-weight: 700; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 46px; }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  flex-wrap: wrap;
  padding: 24px 32px;
  max-width: 860px;
  margin: 0 auto;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-2);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-num { font-family: var(--font-serif); font-size: 30px; font-weight: 800; color: var(--brand-deep); line-height: 1.1; }
.stat-label { font-size: 13px; color: var(--text-2); }
.stat-divider { width: 1px; height: 34px; background: var(--line-strong); }

.platform-row { display: flex; align-items: center; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 26px; }
.platform-row-label { font-size: 13px; color: var(--text-3); margin-right: 4px; }
.platform-tag {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  padding: 5px 13px;
  border-radius: 999px;
  transition: all .2s;
}
.platform-tag:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }

/* 页面级 hero（子页） */
.page-hero {
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.page-hero h1 { font-size: clamp(30px, 4.4vw, 46px); margin-bottom: 18px; }
.page-hero > p { font-size: 17px; color: var(--text-2); max-width: 800px; line-height: 1.95; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); margin-bottom: 22px; }
.breadcrumb a:hover { color: var(--brand); }

/* ========= 优势条 ========= */
.advantage-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: -40px;
  position: relative;
  z-index: 3;
  box-shadow: var(--sh-2);
}
.advantage-item { background: #fff; padding: 26px 24px; display: flex; flex-direction: column; gap: 4px; }
.adv-num { font-family: var(--font-serif); font-size: 22px; font-weight: 800; color: var(--brand); }
.adv-label { font-size: 13.5px; color: var(--text-2); line-height: 1.7; }

/* ========= 卡片网格 ========= */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 8px; }
.feature-card, .tool-grid > article, .card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  box-shadow: var(--sh-1);
  transition: transform .24s cubic-bezier(.2,.8,.3,1), box-shadow .24s, border-color .24s;
}
.feature-card:hover, .tool-grid > article:hover, .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-3);
  border-color: var(--brand-line);
}
.feature-icon, .icon-chip {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  font-size: 24px;
  margin-bottom: 18px;
}
.feature-card h3, .tool-grid h3, .card h3 { font-size: 19px; margin-bottom: 12px; }
.feature-card p, .tool-grid p, .card p { font-size: 14.5px; color: var(--text-2); line-height: 1.9; }
.feature-card strong, .tool-grid strong, .card strong { color: var(--text); font-weight: 700; }
.feature-card ul { margin-top: 16px; display: grid; gap: 9px; }
.feature-card li { font-size: 13.5px; color: var(--text-2); }

.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }

/* 工具矩阵 */
.tools-section { background: var(--bg-soft); }
.tools-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.tool-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 24px 22px;
  box-shadow: var(--sh-1);
  transition: transform .24s cubic-bezier(.2,.8,.3,1), box-shadow .24s, border-color .24s;
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.tool-card-icon { font-size: 26px; }
.tool-card h3 { font-size: 16px; margin: 0; }
.tool-card p { font-size: 13px; color: var(--text-2); line-height: 1.75; margin: 0; }
.tool-card .tool-card-link { margin-top: auto; padding-top: 12px; font-size: 12.5px; font-weight: 800; color: var(--brand); }
.tool-card-badge {
  align-self: flex-start;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .04em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--gold-soft);
  border: 1px solid var(--gold-line);
  color: var(--gold);
}
.tool-card-badge.blue { background: var(--brand-soft); border-color: var(--brand-line); color: var(--brand); }

/* ========= 双入口对比（网页版 / 时长版） ========= */
.route-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 44px; }
.route-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 36px 34px;
  background: #fff;
  box-shadow: var(--sh-2);
  transition: transform .24s cubic-bezier(.2,.8,.3,1), box-shadow .24s;
}
.route-card:hover { transform: translateY(-4px); box-shadow: var(--sh-3); }
.route-card.dark {
  background: linear-gradient(150deg, #0b1220 0%, #16223c 55%, #1b2c4f 100%);
  border-color: #22304d;
  color: #e8eefc;
}
.route-card.dark h3, .route-card.dark h2 { color: #fff; }
.route-card.dark p, .route-card.dark li { color: #aebbd4; }
.route-card.dark .route-kicker { color: #ffd8a1; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); }
.route-card.dark .route-list li strong { color: #fff; }
.route-card.dark::after {
  content: "";
  position: absolute;
  right: -110px; top: -110px;
  width: 300px; height: 300px;
  border-radius: 50%;
  border: 46px solid rgba(96,165,250,.14);
  pointer-events: none;
}
.route-kicker {
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.route-card h3 { font-size: 24px; margin-bottom: 10px; }
.route-card > p { font-size: 15px; line-height: 1.9; color: var(--text-2); }
.route-list { display: grid; gap: 11px; margin: 22px 0 26px; }
.route-list li { position: relative; padding-left: 24px; font-size: 14px; color: var(--text-2); line-height: 1.8; }
.route-list li::before {
  content: "";
  position: absolute;
  left: 3px; top: 11px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand);
}
.route-card.dark .route-list li::before { background: #7fb0ff; }
.route-actions { margin-top: auto; display: flex; gap: 12px; flex-wrap: wrap; }
.route-meta { margin-top: 16px; font-size: 12.5px; color: var(--text-3); }
.route-card.dark .route-meta { color: #8595b3; }

/* ========= 步骤 ========= */
.steps { display: flex; align-items: stretch; gap: 16px; margin-top: 44px; }
.step {
  flex: 1;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 24px;
  box-shadow: var(--sh-1);
}
.step-num {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .1em;
  color: #fff;
  background: var(--brand-grad);
  width: 38px; height: 38px;
  border-radius: 11px;
  display: grid; place-items: center;
  margin-bottom: 16px;
  box-shadow: var(--sh-brand);
}
.step h3 { font-size: 17px; margin-bottom: 10px; }
.step p { font-size: 13.5px; color: var(--text-2); line-height: 1.85; }
.step p a { color: var(--brand); font-weight: 700; }
.step-arrow { display: grid; place-items: center; color: var(--line-strong); font-size: 20px; }

/* ========= 平台入口卡 ========= */
.platform-cards-v2 { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 22px; margin-top: 44px; align-items: start; }
.pcard {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 32px 28px;
  box-shadow: var(--sh-1);
  transition: transform .24s, box-shadow .24s;
}
.pcard:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.pcard-featured { border-color: var(--brand-line); background: linear-gradient(170deg, #f7faff 0%, #fff 60%); box-shadow: var(--sh-2); }
.pcard-label {
  align-self: flex-start;
  font-size: 11.5px; font-weight: 800; letter-spacing: .1em;
  color: var(--brand); background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  padding: 4px 11px; border-radius: 999px;
}
.pcard-icon { font-size: 30px; }
.pcard h3 { font-size: 19px; }
.pcard p { font-size: 14px; color: var(--text-2); line-height: 1.85; }
.pcard ul { display: grid; gap: 8px; margin: 6px 0 12px; }
.pcard li { font-size: 13.5px; color: var(--text-2); }
.pcard .btn-primary { margin-top: auto; align-self: flex-start; }
.pcard-qr { margin-top: 8px; text-align: center; }
.pcard-qr img { width: 148px; margin: 0 auto 8px; border-radius: 12px; border: 1px solid var(--line); }
.pcard-qr p { font-size: 12.5px; color: var(--text-3); }

/* ========= 场景 ========= */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.scenario-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px 26px;
  box-shadow: var(--sh-1);
  transition: transform .24s, box-shadow .24s, border-color .24s;
}
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.scenario-icon { font-size: 28px; margin-bottom: 14px; }
.scenario-card h3 { font-size: 18px; margin-bottom: 12px; }
.scenario-card p { font-size: 14px; color: var(--text-2); line-height: 1.9; }
.scenario-card ul { margin-top: 16px; display: grid; gap: 8px; }
.scenario-card li { font-size: 13.5px; color: var(--text-2); }

/* ========= 教程卡 ========= */
.tutorial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 44px; }
.tutorial-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 20px 22px;
  box-shadow: var(--sh-1);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.tutorial-card:hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.tut-icon { font-size: 22px; line-height: 1.3; }
.tutorial-card h4 { font-size: 15px; margin-bottom: 4px; }
.tutorial-card p { font-size: 12.5px; color: var(--text-3); line-height: 1.7; }

/* ========= 关键词云 ========= */
.seo-keywords { background: var(--bg-soft); padding: 76px 0; }
.keyword-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.kw-tag {
  font-size: 13px;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
  transition: all .2s;
}
.kw-tag:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }

/* ========= FAQ ========= */
.faq-list { display: grid; gap: 12px; margin-top: 40px; max-width: 900px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 4px 24px;
  box-shadow: var(--sh-1);
  transition: border-color .2s, box-shadow .2s;
}
.faq-item[open] { border-color: var(--brand-line); box-shadow: var(--sh-2); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  padding: 18px 32px 18px 0;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--text-3);
  transition: transform .22s;
}
.faq-item[open] summary::after { content: "−"; color: var(--brand); }
.faq-item > p, .faq-item > div {
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.95;
  padding: 0 0 20px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

/* ========= 表格 ========= */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--sh-1); }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 14px; min-width: 640px; }
th, td { text-align: left; padding: 15px 20px; border-bottom: 1px solid var(--line); }
th { background: var(--bg-soft); font-family: var(--font-serif); font-weight: 700; font-size: 13.5px; color: var(--text); }
tbody tr:last-child td { border-bottom: 0; }
td { color: var(--text-2); }

/* ========= 代码块 ========= */
.code-block {
  position: relative;
  border-radius: var(--r-lg);
  background: #0a1120;
  border: 1px solid #1b2740;
  overflow: hidden;
  box-shadow: var(--sh-2);
}
.code-block pre {
  margin: 0;
  padding: 22px 24px;
  overflow-x: auto;
  color: #d7e4ff;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
}
.code-block .code-label {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 20px;
  border-bottom: 1px solid #1b2740;
  background: #0d1526;
  color: #7f93b8;
  font-family: var(--font-mono);
  font-size: 12px;
}
.code-dot { width: 9px; height: 9px; border-radius: 50%; background: #2b3a58; }

/* ========= CTA ========= */
.cta { padding: 92px 0; }
.cta-inner {
  position: relative;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(140deg, #0b1220 0%, #16233d 52%, #1d3260 100%);
  border-radius: var(--r-xl);
  padding: 68px 40px;
  box-shadow: var(--sh-3);
}
.cta-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  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: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, #000, transparent 75%);
}
.cta-inner > * { position: relative; }
.cta-inner h2 { color: #fff; font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.cta-inner p { color: #a9b8d4; font-size: 16px; margin-bottom: 30px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta-inner .btn-ghost { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.22); color: #fff; }
.cta-inner .btn-ghost:hover { background: rgba(255,255,255,.13); border-color: rgba(255,255,255,.4); color: #fff; }

/* ========= FOOTER ========= */
.footer, .site-footer { background: var(--ink); color: #97a4bd; padding: 66px 0 0; }
.site-footer {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 66px 24px 44px;
  background: transparent;
}
.footer { padding-bottom: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 44px; }
.footer .brand, .footer .logo, .site-footer .brand { color: #fff; margin-bottom: 16px; }
.footer .logo-text em, .site-footer .brand em { color: #7fb0ff; }
.footer-brand p, .site-footer > div > p { font-size: 13.5px; line-height: 1.9; max-width: 380px; color: #8695b0; }
.footer-meta { display: flex; flex-direction: column; gap: 5px; margin-top: 16px; font-size: 13px; }
.footer-meta strong { color: #cdd8ec; }
.footer-links h3, .footer-links h4, .footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 16px; font-family: var(--font-serif); }
.footer-links a, .footer-links span, .footer-col a, .footer-col span {
  display: block;
  font-size: 13.5px;
  color: #8695b0;
  padding: 5px 0;
  transition: color .18s;
}
.footer-links a:hover, .footer-col a:hover { color: #7fb0ff; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 24px 26px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12.5px;
  color: #6f7e99;
}
body > .footer-bottom { background: var(--ink); max-width: none; }
body > .footer-bottom > * { }

/* ========= 浮动菜单 / sticky bar ========= */
.float-menu { position: fixed; right: 22px; bottom: 26px; z-index: 90; display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.float-toggle {
  background: var(--brand-grad);
  color: #fff;
  font-size: 13.5px;
  font-weight: 800;
  padding: 12px 22px;
  border-radius: 999px;
  box-shadow: var(--sh-brand);
  transition: transform .2s;
}
.float-toggle:hover { transform: translateY(-2px); }
.float-links { display: none; flex-direction: column; gap: 8px; align-items: flex-end; }
.float-links.open { display: flex; }
.float-links a {
  background: #fff;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  box-shadow: var(--sh-2);
  transition: all .18s;
}
.float-links a:hover { color: var(--brand); border-color: var(--brand-line); background: var(--brand-soft); }
.sticky-bar { display: none; }

/* ========= 动效 ========= */
@keyframes fadeSlideUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeSlideDown { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
.hero-badge, .hero-title, .hero-desc, .hero-actions, .hero-stats, .platform-row { animation: fadeSlideDown .7s ease both; }
.hero-title { animation-delay: .05s; }
.hero-desc { animation-delay: .12s; }
.hero-actions { animation-delay: .18s; }
.hero-stats { animation-delay: .24s; }
.platform-row { animation-delay: .3s; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ========= 响应式 ========= */
@media (max-width: 1100px) {
  .tools-grid { grid-template-columns: repeat(3, 1fr); }
  .platform-cards-v2 { grid-template-columns: 1fr 1fr; }
  .site-nav a, .nav-links a { padding: 8px 9px; font-size: 13.5px; }
}
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .features-grid, .scenario-grid, .tutorial-grid { grid-template-columns: 1fr 1fr; }
  .route-grid { grid-template-columns: 1fr; }
  .advantage-bar { grid-template-columns: 1fr 1fr; }
  .footer-grid, .site-footer { grid-template-columns: 1fr 1fr; }
  .steps { flex-wrap: wrap; }
  .step { flex: 1 1 45%; }
  .step-arrow { display: none; }
}
@media (max-width: 820px) {
  /* 手机：品牌 | 主按钮 | 菜单 一行排下，菜单展开在下方 */
  .site-header, .nav-inner { height: auto; min-height: 60px; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; gap: 10px; }
  .header-cta, .btn-nav, .nav-actions { order: 3; margin-left: auto; padding: 8px 16px; font-size: 13.5px; }
  .nav-toggle { display: inline-block; order: 4; }
  .site-nav, .nav-links { order: 5; width: 100%; margin-right: 0; gap: 2px; display: none; padding-bottom: 6px; }
  .site-nav.open, .nav-links.open { display: flex; }
  .site-nav a, .nav-links a { flex: 1 1 30%; text-align: center; }
}
@media (max-width: 720px) {
  .section { padding: 60px 0; }
  .hero { padding: 72px 18px 60px; }
  .hero-stats { gap: 20px; padding: 20px; }
  .stat-divider { display: none; }
  .stat { flex: 1 1 40%; }
  .features-grid, .scenario-grid, .tutorial-grid, .tools-grid, .platform-cards-v2 { grid-template-columns: 1fr; }
  .advantage-bar { grid-template-columns: 1fr; margin-top: -20px; }
  .footer-grid, .site-footer { grid-template-columns: 1fr; }
  .step { flex: 1 1 100%; }
  .cta-inner { padding: 48px 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .container { padding: 0 18px; }
}

/* ============================================================
   子页面组件（此前缺失样式，统一补齐）
   ============================================================ */
:root { --content: 1152px; }

/* 内容带 */
.content-band { max-width: var(--maxw); margin: 0 auto; padding: 72px 24px; }
.content-band > * { max-width: 100%; }
.section-lede { font-size: 16px; color: var(--text-2); line-height: 1.9; max-width: 760px; margin-bottom: 22px; }

/* 提示框 */
.callout {
  border: 1px solid var(--brand-line);
  border-left: 4px solid var(--brand);
  border-radius: var(--r);
  background: var(--brand-soft);
  padding: 18px 22px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-2);
}
.callout strong { color: var(--text); }
.callout.tip { border-color: #bbf7d0; border-left-color: #16a34a; background: #f0fdf4; }
.callout.warn { border-color: var(--gold-line); border-left-color: #d97706; background: var(--gold-soft); }

/* 卡片式长文容器 */
.prose-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  box-shadow: var(--sh-1);
}
.prose-card h3 { font-size: 19px; margin-bottom: 14px; }
.prose-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.9; }

/* 表格变体 */
.spec-table, .tier-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td, .tier-table th, .tier-table td {
  text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line);
}
.spec-table th, .tier-table th { background: var(--bg-soft); font-family: var(--font-serif); font-weight: 700; font-size: 13.5px; }
.spec-table tbody tr:last-child td, .tier-table tbody tr:last-child td { border-bottom: 0; }
.spec-table td, .tier-table td { color: var(--text-2); }
.tier-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--sh-1); }
.tier-table { min-width: 680px; background: #fff; }
.prose-card .spec-table { border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }

/* 步骤网格 */
.how-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; margin-top: 12px; }
.how-step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 22px;
  box-shadow: var(--sh-1);
  transition: transform .22s, box-shadow .22s;
}
.how-step:hover { transform: translateY(-3px); box-shadow: var(--sh-2); }
.how-step .label, .how-step > span.label {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--brand-grad); color: #fff;
  font-family: var(--font-serif); font-size: 13px; font-weight: 800;
  margin-bottom: 14px; box-shadow: var(--sh-brand);
}
.how-step h3, .how-step h4 { font-size: 16px; margin-bottom: 8px; }
.how-step p { font-size: 13.5px; color: var(--text-2); line-height: 1.85; }

/* 有序步骤列表 */
.step-list { display: grid; gap: 14px; counter-reset: stepnum; }
.step-list > * {
  position: relative;
  counter-increment: stepnum;
  padding: 18px 22px 18px 58px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--sh-1);
}
.step-list > *::before {
  content: counter(stepnum);
  position: absolute;
  left: 20px; top: 19px;
  display: grid; place-items: center;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  color: var(--brand);
  font-family: var(--font-serif);
  font-size: 12.5px; font-weight: 800;
}
.step-list h3, .step-list h4 { font-size: 15.5px; margin-bottom: 5px; }
.step-list p { font-size: 13.5px; color: var(--text-2); line-height: 1.85; }

/* 通用卡片网格 */
.case-grid, .article-grid, .feature-grid, .coin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}
.case-grid > *, .article-grid > *, .feature-grid > * {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 26px;
  box-shadow: var(--sh-1);
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.case-grid > *:hover, .article-grid > *:hover, .feature-grid > *:hover {
  transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--brand-line);
}
.case-grid h3, .article-grid h3, .feature-grid h3 { font-size: 18px; margin-bottom: 10px; }
.case-grid h4, .article-grid h4, .feature-grid h4 { font-size: 15.5px; margin-bottom: 8px; }
.case-grid p, .article-grid p, .feature-grid p { font-size: 14px; color: var(--text-2); line-height: 1.9; }
.case-grid ul, .feature-grid ul { margin-top: 14px; display: grid; gap: 8px; }
.case-grid li, .feature-grid li { font-size: 13.5px; color: var(--text-2); }

/* 金币卡 */
.coin-card {
  position: relative;
  display: flex; flex-direction: column; gap: 6px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 26px;
  box-shadow: var(--sh-1);
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.coin-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.coin-badge {
  align-self: flex-start;
  font-size: 11px; font-weight: 800; letter-spacing: .06em;
  color: var(--gold); background: var(--gold-soft);
  border: 1px solid var(--gold-line);
  padding: 3px 10px; border-radius: 999px;
  margin-bottom: 6px;
}
.coin-amount { font-family: var(--font-serif); font-size: 30px; font-weight: 800; color: var(--text); line-height: 1.2; }
.coin-unit { font-size: 13px; color: var(--text-3); font-weight: 600; }
.coin-price { font-size: 20px; font-weight: 800; color: var(--brand); }
.coin-desc { font-size: 13.5px; color: var(--text-2); line-height: 1.8; }

/* 对比区 */
.compare-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.compare-col {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 26px;
  box-shadow: var(--sh-1);
}
.compare-col h3, .compare-col h4 { font-size: 17px; margin-bottom: 14px; }
.compare-col ul { display: grid; gap: 10px; }
.compare-col li { font-size: 13.5px; color: var(--text-2); line-height: 1.8; padding-left: 22px; position: relative; }
.compare-col li::before { content: "•"; position: absolute; left: 6px; color: var(--text-3); }
.compare-col.ours { border-color: var(--brand-line); background: linear-gradient(170deg, #f7faff, #fff 60%); }
.compare-col.ours h3, .compare-col.ours h4 { color: var(--brand-deep); }
.compare-col.ours li::before { content: "✓"; color: var(--brand); font-weight: 800; }
.compare-col.theirs { background: var(--bg-soft); }
.compare-col.theirs li::before { content: "×"; color: #b45309; font-weight: 800; }

/* 标签 */
.tag-list { display: flex; flex-wrap: wrap; gap: 9px; }
.tag, .platform-chip {
  font-size: 13px; font-weight: 600;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
  transition: all .2s;
}
.tag:hover, .platform-chip:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }
.check { color: #16a34a; font-weight: 800; }

/* FAQ 分组 */
.faq-category { margin-bottom: 40px; }
.faq-category > h2, .faq-category > h3 { font-size: 21px; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.faq-category .faq-list { margin-top: 0; }

/* 左右分栏 */
.section.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.phone-stack {
  display: grid; gap: 14px;
  background: linear-gradient(160deg, #f7faff, #eef4ff);
  border: 1px solid var(--brand-line);
  border-radius: var(--r-xl);
  padding: 26px;
  box-shadow: var(--sh-2);
}
.phone-stack img { border-radius: var(--r); box-shadow: var(--sh-2); }

/* 子页 CTA */
.cta-section {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  max-width: calc(var(--maxw) - 48px);
  margin: 0 auto 80px;
  padding: 52px 44px;
  border-radius: var(--r-xl);
  background: linear-gradient(140deg, #0b1220 0%, #16233d 52%, #1d3260 100%);
  box-shadow: var(--sh-3);
}
.cta-section::before {
  content: "";
  position: absolute; inset: 0;
  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: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 60% 80% at 40% 40%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 80% at 40% 40%, #000, transparent 75%);
}
.cta-section > * { position: relative; }
.cta-section .eyebrow { color: #ffd8a1; }
.cta-section h2 { color: #fff; font-size: clamp(22px, 2.8vw, 30px); margin-bottom: 8px; }
.cta-section p { color: #a9b8d4; font-size: 15px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
/* 浅色底上的次按钮（子页 hero 等）；深色 CTA 区里单独覆盖 */
.btn.secondary {
  background: #fff;
  border: 1px solid var(--line-strong);
  color: var(--text);
  box-shadow: var(--sh-1);
}
.btn.secondary:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.cta-section .btn.secondary {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.22);
  color: #fff;
  box-shadow: none;
}
.cta-section .btn.secondary:hover { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.4); }

@media (max-width: 960px) {
  .section.split { grid-template-columns: 1fr; gap: 32px; }
  .cta-section { padding: 40px 26px; }
}

/* ===== 滚动渐显（由 main.js 添加 .reveal / .is-revealed） =====
   使用独立的 translate 属性，避免覆盖各卡片 :hover 上的 transform */
.reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity .55s cubic-bezier(.2,.8,.3,1), translate .55s cubic-bezier(.2,.8,.3,1);
}
.reveal.is-revealed { opacity: 1; translate: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; translate: none; } }


/* ============================================================
   卡片内操作区底部对齐
   Grid 行内卡片本就等高，把按钮组 margin-top:auto 顶到底部，
   同一行的按钮才会落在同一条水平线上。
   ============================================================ */
.tool-grid > article,
.case-grid > *,
.article-grid > *,
.feature-grid > * {
  display: flex;
  flex-direction: column;
}
.tool-grid > article > .route-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.tool-grid > article > .route-actions > .btn-primary,
.tool-grid > article > .route-actions > .btn-ghost,
.tool-grid > article > .route-actions > .btn {
  width: 100%;
  padding-left: 12px;
  padding-right: 12px;
  text-align: center;
}
/* !important 是刻意的：卡片按钮贴底是这个组件的布局不变量，
   不能被卡片里临时加的内联 margin-top 破坏（历史上就是这么错位的）。
   注意选择器只覆盖卡片内部，页面级 .route-actions 的内联间距不受影响。 */
.tool-grid > article > .route-actions,
.tool-grid > article > .cta-actions,
.case-grid > * > .cta-actions,
.article-grid > * > .cta-actions,
.feature-grid > * > .cta-actions,
.card > .route-actions {
  margin-top: auto !important;
  padding-top: 6px;
}
/* 卡片里的图标块不要被 flex 拉伸 */
.tool-grid > article > .icon-chip,
.case-grid > * > .icon-chip,
.article-grid > * > .icon-chip,
.feature-grid > * > .icon-chip,
.feature-card > .feature-icon {
  flex: 0 0 auto;
  align-self: flex-start;
}

/* 使用入口三张卡：等高 + 主按钮贴底 */
.platform-cards-v2 { align-items: stretch; }
.pcard > ul { margin-bottom: 18px; }
.pcard > .btn-primary,
.pcard > .btn,
.pcard > .pcard-qr { margin-top: auto; }
.pcard-qr { padding-top: 8px; }

/* 特性卡：列表撑开，卡片等高时底边整齐 */
.feature-card { display: flex; flex-direction: column; }
.feature-card > ul { margin-top: 16px; }

/* ============================================================
   首页 v4（body.hp）
   结构：深色首屏 + 前后对比滑块 → 工具直达 → 三步流程 → 优势 bento
        → 版本选择 → 全部工具 → 场景 → 大家都在问 → FAQ → 收尾 CTA
   ============================================================ */
.ico { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.ico-sm { width: 16px; height: 16px; }
.ico-lg { width: 26px; height: 26px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* 首页导航：深色玻璃，和首屏连成一体 */
/* 顶部透明、融进首屏渐变；滚动后变深色毛玻璃 */
body.hp .site-header {
  background: transparent;
  border-bottom-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
body.hp .site-header.is-scrolled {
  background: rgba(8, 12, 24, .86);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  backdrop-filter: saturate(160%) blur(18px);
  border-bottom-color: rgba(255, 255, 255, .08);
  box-shadow: 0 10px 30px -18px rgba(0, 0, 0, .6);
}
body.hp .header-cta {
  background: #fff;
  color: #0b1122;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .1), 0 8px 24px -10px rgba(120, 140, 255, .55);
}
body.hp .header-cta:hover { background: #eef2ff; box-shadow: 0 0 0 1px rgba(255, 255, 255, .2), 0 12px 30px -10px rgba(120, 140, 255, .7); }
/* 手机菜单展开时导航变高，超出首屏的部分要有实底 */
body.hp .site-header:has(.site-nav.open) { background: rgba(8, 12, 24, .96); }
body.hp .brand, body.hp .site-header .logo-text { color: #fff; }
body.hp .site-header .logo-text em { color: #9db4ff; }
body.hp .site-nav a { color: #b9c3d8; }
body.hp .site-nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
body.hp .nav-toggle { color: #dbe3f3; border-color: rgba(255, 255, 255, .22); }
body.hp .nav-tag { color: #1b1300; background: linear-gradient(135deg, #fcd34d, #f59e0b); }

/* ---------- 首屏 ---------- */
.hp-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: #070b17;
  color: #fff;
  /* 往上顶到导航下面，让导航透明时背后也是首屏渐变 */
  margin-top: -68px;
  padding: 144px 0 148px;
}
.hp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(42% 52% at 78% 30%, rgba(99, 102, 241, .34), transparent 70%),
    radial-gradient(40% 50% at 8% 0%, rgba(37, 99, 235, .32), transparent 72%),
    radial-gradient(30% 30% at 55% 100%, rgba(168, 85, 247, .18), transparent 70%);
}
.hp-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  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: 56px 56px;
  -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000 30%, transparent 80%);
  mask-image: radial-gradient(70% 60% at 50% 30%, #000 30%, transparent 80%);
}
.hp-hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  gap: 56px;
  align-items: center;
}
.hp-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 14px 5px 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  font-size: 13px;
  color: #cdd6ea;
}
.hp-pill b {
  font-size: 11.5px;
  font-weight: 700;
  color: #052e16;
  background: linear-gradient(135deg, #86efac, #4ade80);
  padding: 2px 9px;
  border-radius: 999px;
}
.hp-title {
  color: #fff;
  font-size: clamp(38px, 5.2vw, 62px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
  margin: 24px 0 22px;
}
.hp-kw {
  display: block;
  font-size: clamp(14px, 1.3vw, 17px);
  font-weight: 700;
  letter-spacing: .08em;
  color: #9db4ff;
  margin-bottom: 16px;
}
.grad-text {
  background: linear-gradient(100deg, #7da2ff 0%, #a78bfa 48%, #f0abfc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hp-lead { font-size: 17px; line-height: 1.85; color: #aab6cc; max-width: 540px; }
.hp-lead strong { color: #e6ebf5; font-weight: 600; }
.hp-cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.btn-glow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #3b6cff 0%, #6d5cf6 60%, #8b5cf6 100%);
  box-shadow: 0 12px 32px -10px rgba(99, 102, 241, .8), inset 0 1px 0 rgba(255, 255, 255, .25);
  transition: transform .18s cubic-bezier(.2, .8, .3, 1), box-shadow .2s;
  white-space: nowrap;
}
.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -12px rgba(99, 102, 241, .9), inset 0 1px 0 rgba(255, 255, 255, .25); }
.btn-glow .ico { transition: transform .18s; }
.btn-glow:hover .ico { transform: translateX(3px); }
.btn-glass {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: #e6ebf5;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .16);
  transition: background .2s, border-color .2s, transform .18s;
  white-space: nowrap;
}
.btn-glass:hover { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .3); transform: translateY(-2px); }
.hp-trust { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 28px; font-size: 13.5px; color: #93a0b8; }
.hp-trust span { display: inline-flex; align-items: center; gap: 7px; }
.hp-trust .ico { color: #4ade80; width: 16px; height: 16px; stroke-width: 2.4; }

/* ---------- 前后对比滑块 ---------- */
.hp-demo { position: relative; }
.hp-demo::before {
  content: "";
  position: absolute;
  inset: 8% 4% -6%;
  z-index: -1;
  border-radius: 40px;
  background: linear-gradient(135deg, rgba(59, 108, 255, .55), rgba(139, 92, 246, .45));
  filter: blur(60px);
  opacity: .55;
}
.ba { margin: 0; }
.ba-frame {
  --pos: 50%;
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background: #0d1426;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .85), 0 0 0 7px rgba(255, 255, 255, .035);
  cursor: ew-resize;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}
.ba-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.ba-before { clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.ba-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos);
  width: 2px;
  margin-left: -1px;
  background: #fff;
  box-shadow: 0 0 16px rgba(255, 255, 255, .55);
  pointer-events: none;
}
.ba-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 42px;
  height: 42px;
  margin: -21px 0 0 -21px;
  border-radius: 50%;
  background: #fff;
  color: #3b4cca;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .35);
}
.ba-knob .ico { width: 20px; height: 20px; stroke-width: 2.2; }
.ba-tag {
  position: absolute;
  bottom: 14px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: rgba(7, 11, 23, .62);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  pointer-events: none;
}
.ba-tag-l { left: 14px; }
.ba-tag-r { right: 14px; background: linear-gradient(135deg, rgba(59, 108, 255, .92), rgba(139, 92, 246, .92)); }
.ba-range {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.ba-range:focus-visible ~ .ba-line .ba-knob { outline: 3px solid #a5b4fc; outline-offset: 3px; }
.ba-cap { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 16px; font-size: 13px; color: #8f9bb3; }
.ba-cap .ico { width: 16px; height: 16px; }
.hp-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 12.5px;
  color: #dbe3f3;
  background: rgba(15, 22, 42, .82);
  border: 1px solid rgba(255, 255, 255, .12);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .7);
  pointer-events: none;
  white-space: nowrap;
}
.hp-chip i { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74, 222, 128, .18); }
.hp-chip b { color: #fff; font-weight: 700; }
.hp-chip.c1 { left: -28px; top: 44%; }
.hp-chip.c2 { right: 26px; top: -18px; }

/* ---------- 工具直达（压在首屏底边） ---------- */
.hp-launch { position: relative; z-index: 2; max-width: var(--maxw); margin: -96px auto 0; padding: 0 24px; }
.hp-launch-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.hp-tool {
  --tint: #2563eb;
  --tint-soft: #eef3fe;
  --tint-line: #bfd0fb;
  --tint-glow: rgba(37, 99, 235, .4);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 22px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 28px 50px -28px rgba(16, 24, 40, .28);
  transition: transform .2s cubic-bezier(.2, .8, .3, 1), box-shadow .2s, border-color .2s;
}
.hp-tool:hover { transform: translateY(-5px); border-color: var(--tint-line); box-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 34px 60px -26px var(--tint-glow); }
.hp-tool-ico {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  color: var(--tint);
  background: var(--tint-soft);
  margin-bottom: 6px;
}
.hp-tool h3 { font-size: 17.5px; margin: 0; }
.hp-tool p { font-size: 13.5px; color: var(--text-2); line-height: 1.7; }
.hp-tool .go { margin-top: auto; padding-top: 10px; display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--tint); }
.hp-tool .go .ico { width: 16px; height: 16px; transition: transform .18s; }
.hp-tool:hover .go .ico { transform: translateX(4px); }
.hp-tool.t-video { --tint: #2563eb; --tint-soft: #eef3fe; --tint-line: #bfd0fb; --tint-glow: rgba(37, 99, 235, .4); }
.hp-tool.t-drop { --tint: #0e7490; --tint-soft: #e9f7fa; --tint-line: #a9dde8; --tint-glow: rgba(14, 116, 144, .35); }
.hp-tool.t-image { --tint: #7c3aed; --tint-soft: #f3eefe; --tint-line: #d5c4fb; --tint-glow: rgba(124, 58, 237, .35); }
.hp-tool.t-text { --tint: #c2410c; --tint-soft: #fdf1ea; --tint-line: #f5c9b0; --tint-glow: rgba(194, 65, 12, .3); }
.hp-launch-note { margin-top: 18px; text-align: center; font-size: 14px; color: var(--text-2); }
.hp-launch-note a { color: var(--brand); font-weight: 700; }
.hp-launch-note a:hover { text-decoration: underline; text-underline-offset: 3px; }

.hp-platforms { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 10px 30px; max-width: var(--maxw); margin: 0 auto; padding: 46px 24px 0; font-size: 13.5px; color: var(--text-3); }
.hp-platforms b { font-size: 15px; font-weight: 700; color: #3f4a5c; letter-spacing: .02em; }

/* ---------- 通用区块 ---------- */
.hp-sec { max-width: var(--maxw); margin: 0 auto; padding: 108px 24px; }
.hp-band { background: var(--bg-soft); }
.hp-head { text-align: center; max-width: 780px; margin: 0 auto 54px; }
.hp-eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em; color: var(--brand); }
.hp-h2 { font-size: clamp(28px, 3.6vw, 44px); font-weight: 800; line-height: 1.22; letter-spacing: -.025em; margin: 12px 0 16px; }
.hp-sub { font-size: 16.5px; line-height: 1.85; color: var(--text-2); }

/* ---------- 三步流程 ---------- */
.hp-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.hp-step { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 12px 12px 26px; box-shadow: var(--sh-1); }
.hp-step-vis { position: relative; aspect-ratio: 16 / 10; border-radius: 14px; overflow: hidden; background: #f1f4fb; }
.hp-step-vis img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hp-step h3 { display: flex; align-items: center; gap: 10px; font-size: 18.5px; margin: 20px 12px 8px; }
.hp-step h3 .n { font-family: var(--font-num); font-size: 12.5px; font-weight: 700; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-line); padding: 1px 8px; border-radius: 7px; letter-spacing: .04em; }
.hp-step p { margin: 0 12px; font-size: 14px; line-height: 1.8; color: var(--text-2); }
/* 第 1 步：上传面板示意 */
.mock-upload { position: absolute; inset: 14px; border-radius: 12px; border: 1.5px dashed #b9c6ef; background: linear-gradient(180deg, #f8faff, #eef2ff); display: grid; place-items: center; align-content: center; gap: 10px; text-align: center; color: #3b4cca; }
.mock-upload .ico { width: 30px; height: 30px; }
.mock-upload strong { font-size: 14px; color: #1e2a55; }
.mock-file { display: inline-flex; align-items: center; gap: 8px; margin-top: 4px; padding: 7px 12px; border-radius: 10px; background: #fff; border: 1px solid var(--line); font-size: 12px; color: var(--text-2); box-shadow: var(--sh-1); }
.mock-file .bar { width: 64px; height: 5px; border-radius: 9px; background: #e5e9f5; overflow: hidden; }
.mock-file .bar::after { content: ""; display: block; width: 72%; height: 100%; border-radius: inherit; background: var(--brand-grad); }
/* 第 2 步：框选示意（框住演示图底部字幕） */
.mock-select { position: absolute; left: 28%; top: 80%; width: 33%; height: 11%; border: 2px solid #fff; border-radius: 4px; box-shadow: 0 0 0 1px rgba(59, 76, 202, .9), 0 0 0 999px rgba(7, 11, 23, .38); }
.mock-select::before, .mock-select::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: #fff; border: 2px solid #4f46e5; }
.mock-select::before { left: -6px; top: -6px; }
.mock-select::after { right: -6px; bottom: -6px; }
.mock-badge { position: absolute; left: 12px; top: 12px; display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 999px; font-size: 11.5px; font-weight: 700; color: #fff; background: rgba(7, 11, 23, .66); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.mock-badge .ico { width: 13px; height: 13px; stroke-width: 2.4; }
.mock-badge.ok { background: rgba(22, 163, 74, .9); }
.mock-dl { position: absolute; right: 12px; bottom: 12px; display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 10px; font-size: 12px; font-weight: 700; color: #1e2a55; background: #fff; box-shadow: 0 8px 20px -8px rgba(0, 0, 0, .45); }
.mock-dl .ico { width: 14px; height: 14px; color: var(--brand); stroke-width: 2.2; }

/* ---------- 优势 bento ---------- */
.hp-bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.bx { position: relative; overflow: hidden; grid-column: span 2; padding: 30px; border-radius: 22px; border: 1px solid var(--line); background: #fff; box-shadow: var(--sh-1); }
.bx.wide { grid-column: span 4; }
.bx h3 { font-size: 20px; margin-bottom: 8px; }
.bx p { font-size: 14.5px; line-height: 1.8; color: var(--text-2); }
.bx .link-arrow { margin-top: 16px; }
.bx-kicker { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; color: var(--brand); margin-bottom: 14px; }
.bx.dark { background: #0b1122; border-color: #0b1122; color: #fff; }
.bx.dark::before { content: ""; position: absolute; right: -80px; top: -80px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(99, 102, 241, .5), transparent 70%); }
.bx.dark > * { position: relative; }
.bx.dark h3 { color: #fff; }
.bx.dark p { color: #a9b6cd; }
.bx.dark .bx-kicker { color: #fcd34d; }
.bx.dark .link-arrow { color: #a5b4fc; }
.bx-num { font-family: var(--font-num); font-size: 52px; font-weight: 800; letter-spacing: -.03em; line-height: 1; margin: 6px 0 14px; }
.bx-num small { font-size: 20px; font-weight: 700; margin-left: 4px; letter-spacing: 0; }
.bx-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.bx-specs span { font-size: 12.5px; font-weight: 600; padding: 5px 11px; border-radius: 999px; background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .14); color: #dbe3f3; }
/* 三种去字幕方式对比 */
.mc { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.mc figure { margin: 0; }
.mc-shot { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #0d1426; }
.mc-zoom { position: absolute; inset: 0; transform: scale(1.65); transform-origin: 44% 88%; }
.mc-zoom img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.mc-blur { position: absolute; left: 29%; top: 81%; width: 31%; height: 10%; -webkit-backdrop-filter: blur(5px); backdrop-filter: blur(5px); background: rgba(120, 120, 120, .25); }
.mc-crop { position: absolute; left: 0; right: 0; bottom: 0; height: 30%; background: repeating-linear-gradient(-45deg, #1b2236 0 8px, #222b42 8px 16px); display: grid; place-items: center; font-size: 11.5px; font-weight: 700; color: #9aa6c0; }
.mc figcaption { display: flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 13px; font-weight: 600; color: var(--text-2); }
.mc figcaption .ico { width: 16px; height: 16px; stroke-width: 2.6; }
.mc .bad .ico { color: #dc2626; }
.mc .good figcaption { color: #15803d; }
.mc .good .ico { color: #16a34a; }
.mc .good .mc-shot { box-shadow: 0 0 0 2px #22c55e; }
/* 图片去水印小对比 */
.bx .ba-frame { border-radius: 14px; margin-top: 20px; border-color: var(--line); box-shadow: none; }
.bx .ba-tag { bottom: 10px; font-size: 11px; padding: 4px 9px; }
.bx .ba-tag-l { left: 10px; }
.bx .ba-tag-r { right: 10px; }
.bx .ba-knob { width: 34px; height: 34px; margin: -17px 0 0 -17px; }
/* API 代码 */
.bx-code { margin-top: 18px; padding: 16px 18px; border-radius: 12px; background: #0b1122; color: #c7d2fe; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.75; overflow-x: auto; white-space: pre; }
.bx-code .k { color: #f0abfc; }
.bx-code .s { color: #86efac; }
.bx-code .c { color: #8a98b3; }
/* 三端 */
.bx-ends { display: grid; gap: 10px; margin-top: 18px; }
.bx-ends div { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; background: var(--bg-soft); border: 1px solid var(--line); font-size: 14px; font-weight: 600; }
.bx-ends div span { margin-left: auto; font-size: 12.5px; font-weight: 500; color: var(--text-3); }
.bx-ends .ico { color: var(--brand); }

/* ---------- 版本选择 ---------- */
.hp-plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.hp-plan { position: relative; display: flex; flex-direction: column; padding: 36px; border-radius: 24px; border: 1px solid var(--line); background: #fff; box-shadow: var(--sh-2); }
.hp-plan.dark { background: #0b1122; border-color: #0b1122; color: #fff; overflow: hidden; }
.hp-plan.dark::before { content: ""; position: absolute; left: -60px; bottom: -120px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(circle, rgba(139, 92, 246, .4), transparent 70%); }
.hp-plan.dark > * { position: relative; }
.hp-plan-tag { align-self: flex-start; font-size: 12.5px; font-weight: 700; padding: 5px 12px; border-radius: 999px; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-line); }
.hp-plan.dark .hp-plan-tag { color: #fcd34d; background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .14); }
.hp-plan h3 { font-size: 26px; margin: 18px 0 8px; }
.hp-plan.dark h3 { color: #fff; }
.hp-plan > p { font-size: 15px; line-height: 1.85; color: var(--text-2); }
.hp-plan.dark > p { color: #a9b6cd; }
.hp-plan ul { display: grid; gap: 12px; margin: 24px 0 30px; }
.hp-plan li { display: flex; gap: 10px; font-size: 14.5px; line-height: 1.7; color: var(--text-2); }
.hp-plan li .ico { width: 18px; height: 18px; margin-top: 3px; color: #16a34a; stroke-width: 2.4; }
.hp-plan li strong { color: var(--text); font-weight: 700; }
.hp-plan.dark li { color: #b8c3d9; }
.hp-plan.dark li strong { color: #fff; }
.hp-plan.dark li .ico { color: #4ade80; }
.hp-plan-actions { margin-top: auto; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hp-plan-fit { margin-top: 18px; font-size: 13px; color: var(--text-3); }
.hp-plan.dark .hp-plan-fit { color: #8b98b3; }
.hp-plan.dark .btn-ghost { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .2); color: #fff; box-shadow: none; }
.hp-plan.dark .btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; }

/* ---------- 全部工具（紧凑） ---------- */
.hp-tools { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.hp-mini { display: flex; flex-direction: column; gap: 6px; padding: 20px; border-radius: 16px; background: #fff; border: 1px solid var(--line); transition: transform .2s, box-shadow .2s, border-color .2s; }
.hp-mini:hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.hp-mini .ico { color: var(--brand); margin-bottom: 8px; }
.hp-mini h3 { font-size: 15.5px; margin: 0; }
.hp-mini p { font-size: 12.5px; line-height: 1.65; color: var(--text-3); }
.hp-mini em { align-self: flex-start; font-style: normal; font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 999px; color: var(--gold); background: var(--gold-soft); border: 1px solid var(--gold-line); }

/* ---------- 场景 ---------- */
.hp-scn { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.hp-scn a { display: flex; flex-direction: column; gap: 8px; padding: 26px; border-radius: 18px; border: 1px solid var(--line); background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
.hp-scn a:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.hp-scn .ico { color: var(--brand); width: 26px; height: 26px; margin-bottom: 8px; }
.hp-scn h3 { font-size: 17.5px; margin: 0; }
.hp-scn p { font-size: 14px; line-height: 1.8; color: var(--text-2); }
.hp-scn .more { margin-top: auto; padding-top: 6px; font-size: 13.5px; font-weight: 700; color: var(--brand); }

/* ---------- 大家都在问（内链） ---------- */
.hp-q { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; max-width: 1000px; margin: 0 auto; }
.hp-q a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 4px; border-bottom: 1px solid var(--line); font-size: 15.5px; font-weight: 600; color: var(--text); transition: color .18s, padding .18s; }
.hp-q a span { font-size: 12.5px; font-weight: 500; color: var(--text-3); margin-left: 10px; }
.hp-q a .ico { width: 18px; height: 18px; color: var(--text-3); transition: transform .18s, color .18s; }
.hp-q a:hover { color: var(--brand); }
.hp-q a:hover .ico { color: var(--brand); transform: translateX(4px); }

/* ---------- 收尾 CTA ---------- */
.hp-final-wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px 108px; }
.hp-final {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  padding: 64px;
  border-radius: 28px;
  background: #070b17;
  color: #fff;
}
.hp-final::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(50% 80% at 0% 0%, rgba(59, 108, 255, .45), transparent 70%), radial-gradient(40% 70% at 100% 100%, rgba(139, 92, 246, .38), transparent 70%); }
.hp-final h2 { color: #fff; font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; letter-spacing: -.02em; margin-bottom: 14px; }
.hp-final p { color: #aab6cc; font-size: 16px; line-height: 1.8; }
.hp-final .hp-cta-row { margin-top: 28px; }
.hp-qr { text-align: center; padding: 16px 16px 12px; border-radius: 18px; background: #fff; color: var(--text-2); box-shadow: 0 20px 40px -20px rgba(0, 0, 0, .6); }
.hp-qr img { width: 140px; height: 140px; border-radius: 10px; }
.hp-qr p { margin-top: 8px; font-size: 12.5px; color: var(--text-2); line-height: 1.5; }
.hp-qr strong { display: block; color: var(--text); font-size: 13.5px; }

/* ---------- 手机端底部常驻按钮 ---------- */
.hp-mbar { display: none; }

/* ---------- 首页响应式 ---------- */
@media (max-width: 1100px) {
  .hp-tools { grid-template-columns: repeat(4, 1fr); }
  .hp-chip.c1 { left: 12px; }
  .hp-chip.c2 { right: 12px; }
}
@media (max-width: 960px) {
  .hp-hero { padding: 124px 0 132px; }
  .hp-hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hp-copy { text-align: center; }
  .hp-lead { margin-inline: auto; }
  .hp-cta-row, .hp-trust { justify-content: center; }
  .hp-demo { max-width: 680px; margin: 0 auto; width: 100%; }
  .hp-launch-grid { grid-template-columns: repeat(2, 1fr); }
  .hp-steps { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .bx, .bx.wide { grid-column: span 6; }
  .hp-plans { grid-template-columns: 1fr; }
  .hp-tools { grid-template-columns: repeat(3, 1fr); }
  .hp-scn { grid-template-columns: 1fr 1fr; }
  .hp-q { grid-template-columns: 1fr; }
  .hp-final { grid-template-columns: 1fr; padding: 48px 36px; text-align: center; }
  .hp-final .hp-cta-row { justify-content: center; }
  .hp-qr { justify-self: center; }
  .hp-sec { padding: 84px 24px; }
}
@media (max-width: 720px) {
  .hp-hero { margin-top: -60px; padding: 92px 0 112px; }
  /* 手机首屏：标题 → 效果对比 → 按钮，说明文字放到按钮后面，保证对比图和主按钮都在第一屏 */
  .hp-hero-inner { display: flex; flex-direction: column; gap: 0; padding: 0 18px; }
  .hp-copy { display: contents; }
  .hp-pill { order: 1; align-self: center; }
  .hp-title { order: 2; }
  .hp-demo { order: 3; margin-bottom: 4px; }
  .hp-cta-row { order: 4; margin-top: 22px; }
  .hp-lead { order: 5; margin-top: 22px; text-align: center; }
  .hp-trust { order: 6; }
  .ba-cap { margin-top: 10px; }
  .hp-title { margin: 20px 0 16px; }
  .hp-lead { font-size: 15.5px; }
  .hp-cta-row { flex-direction: column; align-items: stretch; }
  .hp-cta-row .btn-glow, .hp-cta-row .btn-glass { justify-content: center; }
  .hp-chip { display: none; }
  .hp-launch { padding: 0 14px; margin-top: -84px; }
  .hp-launch-grid { gap: 10px; }
  .hp-tool { padding: 16px 14px 14px; border-radius: 16px; }
  .hp-tool-ico { width: 40px; height: 40px; border-radius: 11px; }
  .hp-tool h3 { font-size: 15.5px; }
  .hp-tool p { display: none; }
  .hp-tool .go { font-size: 13px; padding-top: 4px; }
  .hp-platforms { gap: 8px 18px; padding-top: 34px; }
  .hp-sec { padding: 68px 18px; }
  .hp-head { margin-bottom: 36px; }
  .hp-sub { font-size: 15px; }
  .bx { padding: 24px 20px; }
  .mc { gap: 8px; }
  .mc figcaption { font-size: 11.5px; }
  .hp-plan { padding: 28px 22px; }
  .hp-tools { grid-template-columns: repeat(2, 1fr); }
  .hp-scn { grid-template-columns: 1fr; }
  .hp-final-wrap { padding: 0 14px 92px; }
  .hp-final { padding: 40px 22px; border-radius: 22px; }
  /* 底部常驻：首屏滚过之后出现，给手机用户一个随时可点的入口 */
  .hp-mbar {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    z-index: 95;
    display: flex;
    gap: 10px;
    padding: 8px;
    border-radius: 16px;
    background: rgba(7, 11, 23, .88);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    box-shadow: 0 16px 40px -12px rgba(0, 0, 0, .55);
    transform: translateY(calc(100% + 24px));
    transition: transform .3s cubic-bezier(.2, .8, .3, 1);
  }
  .hp-mbar.show { transform: none; }
  .hp-mbar a { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 12px; border-radius: 11px; font-size: 15px; font-weight: 700; color: #fff; }
  .hp-mbar a.primary { flex: 1.6; background: linear-gradient(135deg, #3b6cff, #8b5cf6); }
  .hp-mbar a.secondary { background: rgba(255, 255, 255, .1); color: #e6ebf5; }
  body.hp .footer { padding-bottom: 76px; }
}

/* ===== 指南页（how-to-remove-video-subtitles） ===== */
.guide-meta { margin-top: 14px; font-size: 13px; color: var(--text-3); }
.guide-figure { margin: 32px 0 0; }
.guide-cap { margin-top: 14px; text-align: center; font-size: 13px; color: var(--text-3); }
.mc .bad figcaption { color: #b91c1c; }

/* 子页首屏按钮靠左，和标题对齐 */
.page-hero .hero-actions { justify-content: flex-start; margin: 26px 0 22px; animation: none; }

/* ===== 承接页：视频去字幕 / 视频去水印 ===== */
.sr-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.sr-hero-grid .tag-list { margin-top: 4px; }
.sr-ba .ba-frame, .wm-erase .ba-frame { border-color: var(--line); box-shadow: 0 30px 60px -30px rgba(15, 23, 42, .45); }
.sr-cap { margin-top: 12px; text-align: center; font-size: 13px; color: var(--text-3); }
a.tag { cursor: pointer; }
.wm-modes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 28px; max-width: 900px; }
.wm-mode { display: flex; flex-direction: column; gap: 8px; padding: 24px 26px; border-radius: 20px; border: 1px solid var(--line); background: #fff; box-shadow: var(--sh-2); transition: transform .2s, box-shadow .2s, border-color .2s; }
.wm-mode:hover { transform: translateY(-4px); border-color: var(--brand-line); box-shadow: var(--sh-3); }
.wm-mode strong { font-size: 19px; color: var(--text); }
.wm-mode span { font-size: 14px; line-height: 1.75; color: var(--text-2); }
.wm-mode .wm-mode-tag { align-self: flex-start; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-line); }
.wm-mode em { margin-top: 6px; font-style: normal; font-size: 14px; font-weight: 700; color: var(--brand); }
.wm-mode.dark { background: #0b1122; border-color: #0b1122; }
.wm-mode.dark strong { color: #fff; }
.wm-mode.dark span { color: #a9b6cd; }
.wm-mode.dark .wm-mode-tag { color: #fcd34d; background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .14); }
.wm-mode.dark em { color: #a5b4fc; }
.wm-erase { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 40px; align-items: center; margin-top: 32px; }
.wm-erase h3 { font-size: 19px; margin-bottom: 12px; }
.wm-list { display: grid; gap: 10px; }
.wm-list li { position: relative; padding-left: 22px; font-size: 14.5px; line-height: 1.75; color: var(--text-2); }
.wm-list li::before { content: "✓"; position: absolute; left: 2px; color: #16a34a; font-weight: 800; }
.feature-grid a, .compare-col a, .step-list a, .how-step a, .wm-list a { color: var(--brand); font-weight: 600; }
@media (max-width: 960px) {
  .sr-hero-grid, .wm-erase { grid-template-columns: 1fr; gap: 32px; }
  .wm-modes { grid-template-columns: 1fr; }
  .how-steps[style] { grid-template-columns: 1fr !important; }
}
/* 正好 4 张卡：宽屏一行 4 个，中屏 2×2，避免 3+1 落单 */
@media (min-width: 1100px) { .feature-grid:has(> :nth-child(4):last-child) { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 640px) and (max-width: 1099px) { .feature-grid:has(> :nth-child(4):last-child) { grid-template-columns: repeat(2, 1fr); } }
/* 品牌名改为「小豆AI助手去字幕」后变长，小屏收紧导航，保证 logo / 主按钮 / 菜单一行排下 */
@media (max-width: 480px) {
  .site-header { gap: 8px; padding-left: 14px; padding-right: 14px; }
  .site-header .brand { gap: 7px; font-size: 16px; }
  .site-header .brand-mark { width: 28px; height: 28px; }
  .site-header .header-cta { padding: 7px 12px; font-size: 13px; }
  .site-header .nav-toggle { padding: 6px 10px; }
}

/* ===== 博客文章 ===== */
.post { max-width: 780px; margin: 0 auto; padding: 56px 24px 96px; }
.post h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.25; margin: 6px 0 12px; }
.post h2 { font-size: 23px; margin: 48px 0 14px; scroll-margin-top: 84px; }
.post p, .post li { font-size: 16px; line-height: 1.95; color: var(--text-2); }
.post p { margin: 0 0 14px; }
.post a { color: var(--brand); font-weight: 600; }
.post a.btn, .post a.post-card { font-weight: inherit; }
.post ul, .post .post-ol { margin: 0 0 16px; padding-left: 22px; display: grid; gap: 6px; }
.post ul { list-style: disc; }
.post .post-ol { list-style: decimal; }
.post strong { color: var(--text); }
.post .table-wrap { margin: 8px 0 18px; }
.post .callout { margin: 18px 0; }
.post-meta { font-size: 13px; color: var(--text-3); }
.post-lead { font-size: 17px !important; padding: 18px 20px; border-radius: 14px; background: var(--brand-soft); border: 1px solid var(--brand-line); color: var(--text) !important; }
.post-toc { margin: 22px 0 8px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.post-toc strong { display: block; font-size: 14px; margin-bottom: 6px; }
.post-toc ol { margin: 0; padding-left: 20px; list-style: decimal; display: grid; gap: 2px; }
.post-toc li { font-size: 14.5px; line-height: 1.8; }
.post .faq-list { margin-top: 8px; }
.post-cta { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 40px 0 0; padding: 22px 24px; border-radius: 18px; background: #0b1122; color: #fff; }
.post-cta strong { display: block; color: #fff; font-size: 17px; }
.post-cta span { font-size: 13.5px; color: #a9b6cd; }
.post-cta .btn { flex-shrink: 0; }
.post-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.post-cards.wide { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.post-card { display: flex; flex-direction: column; gap: 8px; padding: 18px 20px; border-radius: 16px; border: 1px solid var(--line); background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: var(--brand-line); }
.post-card strong { font-size: 15.5px; line-height: 1.5; color: var(--text); }
.post-card span { font-size: 13px; line-height: 1.7; color: var(--text-3); font-weight: 400; }
@media (max-width: 720px) {
  .post { padding: 36px 18px 72px; }
  .post-cards { grid-template-columns: 1fr; }
  .post-cta { flex-direction: column; align-items: flex-start; }
}

/* ===== 博客配图 ===== */
.post-cover { display: block; width: 100%; height: auto; margin: 22px 0 6px; border-radius: 18px; box-shadow: 0 30px 60px -30px rgba(15, 23, 42, .5); }
.post-fig { margin: 22px 0 26px; }
.post-fig > figcaption, .post-fig figcaption:last-child { margin-top: 10px; text-align: center; font-size: 13px; color: var(--text-3); }
.post .ba-frame { border-color: var(--line); box-shadow: 0 24px 50px -28px rgba(15, 23, 42, .5); }
.post .mc figcaption { text-align: left; font-size: 12.5px; }
.post-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.post-steps > figcaption { grid-column: 1 / -1; }
.post-steps .hp-step { padding: 8px 8px 14px; border-radius: 16px; }
.post-steps .hp-step h3 { font-size: 15px; margin: 12px 6px 4px; }
.post-steps .hp-step p { font-size: 12.5px !important; line-height: 1.6 !important; margin: 0 6px !important; }
.post-steps .mock-upload strong { font-size: 12px; }
.post-steps .mock-badge { font-size: 10.5px; padding: 4px 8px; }
.post-steps .mock-dl { font-size: 11px; padding: 5px 9px; }
.mock-select-logo { left: auto; right: 4%; top: 4%; width: 22%; height: 14%; }
.mock-share { position: absolute; inset: 0; background: linear-gradient(180deg, #1f2937, #0b1122); display: flex; align-items: flex-end; }
.mock-share-sheet { width: 100%; display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; padding: 14px 10px; background: #fff; border-radius: 14px 14px 0 0; }
.mock-share-sheet span { display: grid; place-items: center; gap: 4px; font-size: 10.5px; color: var(--text-2); text-align: center; }
.mock-share-sheet span::before { content: ""; width: 28px; height: 28px; border-radius: 50%; background: #eef2f7; }
.mock-share-sheet span.on { color: var(--brand); font-weight: 700; }
.mock-share-sheet span.on::before { background: var(--brand-grad); box-shadow: 0 0 0 4px rgba(37, 99, 235, .15); }
.mock-paste { position: absolute; inset: 0; display: grid; align-content: center; gap: 10px; padding: 16px; background: linear-gradient(180deg, #f8faff, #eef2ff); }
.mock-input { padding: 10px 12px; border-radius: 10px; border: 1.5px solid #b9c6ef; background: #fff; font-size: 11px; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mock-btn { justify-self: center; padding: 6px 22px; border-radius: 9px; background: var(--brand-grad); color: #fff; font-size: 12px; font-weight: 700; }
.post-phone-wrap { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: center; }
.post-phone-wrap > figcaption { grid-column: 1 / -1; }
.post-phone { padding: 14px 12px 18px; border-radius: 32px; background: #0b1122; box-shadow: 0 30px 60px -28px rgba(15, 23, 42, .6), inset 0 0 0 2px #273148; }
.pp-bar { text-align: center; font-size: 12px; font-weight: 700; color: #e6ebf5; padding: 6px 0 12px; }
.pp-video { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; }
.pp-video img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pp-modes { display: flex; justify-content: center; gap: 10px; margin: 16px 0 12px; }
.pp-modes span { font-size: 11px; padding: 5px 10px; border-radius: 8px; border: 1px solid #3a4560; color: #9aa6c0; }
.pp-modes span.on { border-color: #7c8cff; color: #c7d2fe; }
.pp-submit { margin: 0 18px; padding: 9px 0; border-radius: 10px; text-align: center; font-size: 12.5px; font-weight: 700; color: #fff; background: var(--brand-grad); }
.post-phone-note { padding: 20px 22px; border-radius: 16px; background: var(--bg-soft); border: 1px solid var(--line); }
.post-phone-note strong { display: block; margin-bottom: 8px; }
.post-phone-note ol { margin: 0; padding-left: 20px; list-style: decimal; display: grid; gap: 4px; }
.bq { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.bq-item { position: relative; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); background: #fff; }
.bq-item img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.bq-item span { display: block; padding: 6px 8px 0; font-size: 11.5px; font-weight: 600; color: var(--text); }
.bq-item em { display: block; padding: 2px 8px 8px; font-style: normal; font-size: 11px; color: var(--text-3); }
.bq-item.done em { color: #15803d; font-weight: 700; }
.bq-item.doing em { color: var(--brand); font-weight: 700; }
.bq-item.doing img, .bq-item.wait img { filter: saturate(.6) brightness(.85); }
.post .bx-code { margin: 0; }
.post-card img { display: block; width: calc(100% + 40px); margin: -18px -20px 6px; height: auto; aspect-ratio: 1200 / 630; object-fit: cover; border-radius: 15px 15px 0 0; }
.post-card { overflow: hidden; }
@media (max-width: 720px) {
  .post-steps { grid-template-columns: 1fr; }
  .post-phone-wrap { grid-template-columns: 1fr; justify-items: center; }
  .post-phone { width: 260px; }
  .bq { grid-template-columns: repeat(2, 1fr); }
}