/**
 * ovolve-theme.css — Ovolve Agent 全局视觉规范与设计系统 (Radiant Light Theme)
 * 覆盖：
 * 1. Ovolve Agent 真实 UI 特色：SessionTripartiteCapsule、FluidAuraBackground、BorderBeam、25KB 记忆硬顶、四道确定性门禁与 GEPA 帕累托进化
 * 2. 核心动效：3D Slogan Cylinder、太空人破格出界、中央能量球与生态卫星轨道、逐字波浪翻篇
 * 3. 落地页：悬浮毛玻璃 Header、多平台下载菜单与状态胶囊、交付进度条、场景跑马灯与 Toast
 * 4. 评测区：曲线底图、双栏 FAQ 与卡片微交互
 * 100% 离线静态，零外部 CDN，严格浅色光感主题（严禁 Dark Mode）
 */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-heading: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "JetBrains Mono", monospace;

  /* 基础光感浅色调色板 */
  --bg-page: #FFFFFF;
  --bg-surface: #FAFAF9;
  --bg-card: #FFFFFF;
  --bg-hover: #F5F5F4;
  --bg-input: #FAFAF9;
  --bg-pill: rgba(255, 255, 255, 0.85);

  /* Ovolve Agent 标志性品牌蓝与青光 */
  --brand-blue: #0EA5E9;
  --brand-blue-hover: #0284C7;
  --brand-blue-light: #38BDF8;
  --brand-blue-subtle: #F0F9FF;
  --brand-cyan: #7DD3FC;
  --brand-indigo: #0EA5E9;
  --brand-gradient: linear-gradient(135deg, #0EA5E9 0%, #7DD3FC 100%);
  --brand-aura: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, rgba(56, 189, 248, 0.05) 50%, transparent 70%);

  /* 语义色彩 */
  --color-green: #10B981;
  --color-green-deep: #059669;
  --color-green-subtle: #ECFDF5;
  --color-amber: #F59E0B;
  --color-amber-subtle: #FFFBEB;
  --color-rose: #EF4444;
  --color-rose-subtle: #FEF2F2;

  /* 文本梯度 */
  --text-main: #1C1917;
  --text-secondary: #57534E;
  --text-muted: #78716C;
  --text-caption: #A8A29E;

  /* 边框与倒角 */
  --border-subtle: rgba(28, 25, 23, 0.06);
  --border-light: rgba(28, 25, 23, 0.09);
  --border-focus: rgba(14, 165, 233, 0.4);
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-pill: 9999px;

  /* 物理阴影 (无生硬黑块，纯柔和透气阴影) */
  --shadow-sm: 0 1px 2px 0 rgba(28, 25, 23, 0.04);
  --shadow-card: 0 4px 16px -2px rgba(28, 25, 23, 0.04), 0 1px 3px 0 rgba(28, 25, 23, 0.02);
  --shadow-hover: 0 12px 32px -4px rgba(14, 165, 233, 0.08), 0 4px 12px -2px rgba(28, 25, 23, 0.04);
  --shadow-window: 0 24px 64px -12px rgba(28, 25, 23, 0.12), 0 8px 24px -8px rgba(28, 25, 23, 0.06), 0 0 0 1px rgba(28, 25, 23, 0.06);
  --shadow-floating: 0 20px 48px -10px rgba(0, 0, 0, 0.12), 0 1px 4px rgba(0, 0, 0, 0.04);

  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ═══ 1. Ovolve 原生 FluidAuraBackground ═══ */
.fluid-aura-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

/* 静态暖色微光：去彩虹化，无动画，仅提供纸面纵深 */
.aura-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
}

.aura-warm-top {
  top: -22%;
  left: 50%;
  transform: translateX(-50%);
  width: 68vw;
  height: 44vw;
  background: radial-gradient(closest-side, rgba(14, 165, 233, 0.055), rgba(56, 189, 248, 0.02) 55%, transparent 76%);
}

.aura-stone-mid {
  top: 46%;
  left: -14%;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(closest-side, rgba(168, 162, 158, 0.07), transparent 70%);
}

/* ═══ 2. 悬浮毛玻璃胶囊 Header — 双态：Hero 透 / 滚动实 ═══ */
.site-header-pill {
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
  transition: transform 0.35s var(--ease-smooth);
}

.header-pill-inner {
  pointer-events: auto;
  width: calc(100% - 48px);
  max-width: 1040px;
  height: 58px;
  padding: 0 20px 0 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 8px 28px -10px rgba(28, 25, 23, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.75);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  transition:
    background 0.4s var(--ease-smooth),
    border-color 0.4s var(--ease-smooth),
    box-shadow 0.4s var(--ease-smooth),
    backdrop-filter 0.4s var(--ease-smooth);
}

.site-header-pill.scrolled .header-pill-inner {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  border-color: rgba(28, 25, 23, 0.08);
  box-shadow:
    0 16px 40px -12px rgba(28, 25, 23, 0.12),
    0 2px 6px rgba(28, 25, 23, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.site-header-pill.scrolled .btn-github-pill {
  background: #FAFAF9;
  border-color: #E7E5E4;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon-wrap {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.15);
  overflow: hidden;
}

.brand-icon-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-text-col {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-version-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--brand-blue);
  background: var(--brand-blue-subtle);
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

/* 导航链接（逐字波浪翻滚） */
.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-link {
  font-size: 15.5px;
  font-weight: 520;
  color: var(--text-secondary);
  transition: color 0.2s;
  padding: 6px 0;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--brand-blue);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: -2px;
  height: 2px;
  background: var(--brand-blue);
  border-radius: 2px;
}

/* 逐字翻篇 —— line-height 须覆盖汉字字面，过小会切「面/个/页」等字脚 */
.ov-glyph-wave {
  position: relative;
  display: inline-block;
  overflow: hidden;
  line-height: 1.65;
  padding: 0.06em 0;
  vertical-align: bottom;
}

.ov-glyph-wave .ov-glyph-cell {
  position: relative;
  display: inline-block;
  transition: transform 0.38s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  text-shadow: 0 1.65em currentColor;
  transform: translateY(0);
}

.nav-link:hover .ov-glyph-cell {
  transform: translateY(-1.65em);
}

/*  Header 下载状态机胶囊 (Header Status Pill) */
.ov-dl-status {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.92);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: #1C1917;
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(28, 25, 23, 0.25);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  z-index: 10;
  transition: opacity 0.3s var(--ease-smooth), transform 0.3s var(--ease-smooth);
}

.ov-dl-status.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.ov-dl-spin {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #7DD3FC;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  position: fixed;
  top: 22px;
  right: 22px;
  left: auto;
  z-index: 120;
  margin: 0;
  min-width: 52px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(28, 25, 23, 0.12);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.55);
  box-shadow:
    0 1px 2px rgba(28, 25, 23, 0.04),
    0 8px 24px -12px rgba(28, 25, 23, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #1C1917;
  cursor: pointer;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    color 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.18s var(--ease-smooth);
}

.lang-toggle:hover {
  color: #0C0A09;
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(28, 25, 23, 0.18);
  box-shadow:
    0 2px 4px rgba(28, 25, 23, 0.06),
    0 12px 28px -12px rgba(28, 25, 23, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

.lang-toggle:active {
  transform: translateY(1px);
}

.lang-toggle:focus-visible {
  outline: 2px solid rgba(28, 25, 23, 0.55);
  outline-offset: 3px;
}

@media (max-width: 720px) {
  .lang-toggle {
    top: 14px;
    right: 14px;
    height: 34px;
    min-width: 48px;
    padding: 0 12px;
    font-size: 12px;
  }
}

/* legacy segmented control removed */

.btn-github-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid #E7E5E4;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-github-pill:hover {
  background: #FAFAF9;
  color: var(--text-main);
  border-color: #D6D3D1;
}

.btn-github-pill:active {
  transform: scale(0.98);
}

.btn-download-primary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 14px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: #FFFFFF;
  background: #1C1917;
  box-shadow: none;
  transition: background 0.18s ease;
}

.btn-download-primary:hover {
  background: #292524;
}

.btn-download-primary:active {
  transform: scale(0.98);
}

.btn-download-primary:focus-visible,
.btn-github-pill:focus-visible {
  outline: 2px solid #1C1917;
  outline-offset: 3px;
}

/* 多平台下载下拉菜单 */
.ov-plat-wrap {
  position: relative;
  display: inline-block;
}

.ov-plat-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 250px;
  padding: 6px;
  background: #FFFFFF;
  border: 1px solid rgba(231, 229, 228, 0.9);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 40px -8px rgba(28, 25, 23, 0.15), 0 0 0 1px rgba(28, 25, 23, 0.04);
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateY(-8px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.2s var(--ease-smooth), transform 0.2s var(--ease-smooth);
  z-index: 50;
}

.ov-plat-menu.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.ov-plat-opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
  width: 100%;
  text-align: left;
}

.ov-plat-opt:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}

.ov-plat-tag {
  font-size: 10.5px;
  font-weight: 600;
  color: #0EA5E9;
  background: #F0F9FF;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
}

/* ═══ 3. Hero：一行口号 + 3D 滚字（自进化主线）═══ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero {
  position: relative;
  padding: 148px 0 0;
  text-align: center;
  overflow: hidden;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(239, 246, 255, 0.85);
  border: 1px solid rgba(191, 219, 254, 0.7);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.08);
  font-size: 13px;
  font-weight: 500;
  color: #0284C7;
  margin-bottom: 24px;
}

.badge-sparkle {
  color: #38BDF8;
  font-size: 14px;
}

/* ═══ Hero 标题 + 3D 口号滚筒 ═══ */
.hero-title {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 0.08em 0.16em;
  text-align: center;
  margin: 0 0 16px;
  font-family: var(--font-heading);
  font-size: clamp(40px, 6.2vw, 76px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.15;
  white-space: nowrap;
  color: var(--text-main);
}

.hero-title-lead {
  font-weight: 700;
}

.hero-title-line { display: block; }

.hero-title-em {
  font-style: normal;
  color: inherit;
}

.hero-slogan-stage {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  height: 1.15em;
  margin: 0;
  /* Clip the vertical roll only; keep horizontal room for letter-spacing bleed. */
  overflow: hidden;
  padding-right: 0.14em;
  vertical-align: bottom;
}

.slogan-slot {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1.15em;
  overflow: hidden;
}

.slogan-slot.is-cjk {
  width: 1em;
}

.slogan-slot.is-word {
  width: auto;
  max-width: none;
  /* Negative letter-spacing shrinks the layout box; pad so the last glyph isn't clipped. */
  overflow: hidden;
  padding-left: 0.02em;
  padding-right: 0.16em;
  box-sizing: content-box;
}

.slogan-slot.is-word .slot-char {
  display: inline-block;
  width: auto;
  height: auto;
  line-height: 1.15;
  letter-spacing: inherit;
  white-space: nowrap;
  padding-right: 0.04em;
}

.slot-char {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: inherit;
  transform: translateY(0);
  opacity: 1;
  pointer-events: none;
}

.slot-char.incoming {
  animation: sloganCharIn 0.42s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes sloganCharIn {
  from {
    transform: translateY(110%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .slot-char.incoming {
    animation: none;
  }
}

.hero-subtitle {
  max-width: 42rem;
  margin: 0 auto 28px;
  font-size: clamp(17px, 1.35vw, 19px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--text-secondary);
}

.hero-subtitle span {
  display: block;
  margin-top: 0.35em;
  color: #78716C;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 0;
}

.hero-btn-lg {
  height: 46px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
}

.hero-btn-primary {
  color: #fff;
  background: #1C1917;
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.18s ease, transform 0.15s ease;
}

.hero-btn-primary:hover {
  background: #292524;
}

.hero-btn-primary:active {
  transform: scale(0.98);
}

.hero-btn-primary:focus-visible {
  outline: 2px solid #1C1917;
  outline-offset: 3px;
}

.hero-btn-outline {
  background: transparent;
  color: #44403C;
  border: 0;
  box-shadow: none;
  padding-left: 10px;
  padding-right: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  transition: color 0.18s ease, transform 0.15s ease;
}

.hero-btn-outline:hover {
  background: transparent;
  color: #1C1917;
}

.hero-btn-outline:active {
  transform: scale(0.98);
}

.hero-btn-outline:focus-visible {
  outline: 2px solid #1C1917;
  outline-offset: 3px;
}

.hero-stage-container {
  position: relative;
  z-index: 1;
  margin-top: 64px;
  padding-bottom: 48px;
}

.hero-demo-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 0 auto 18px;
  max-width: 1080px;
  padding: 0 12px;
  font-size: 13px;
  color: #78716C;
}

.hero-demo-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 600;
  color: #0369A1;
}

.hero-demo-live i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #0EA5E9;
  box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.45);
  animation: heroLivePulse 1.8s ease-out infinite;
}

@keyframes heroLivePulse {
  0% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.45); }
  70% { box-shadow: 0 0 0 8px rgba(14, 165, 233, 0); }
  100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0); }
}

.hero-demo-phase {
  font-weight: 620;
  color: #1C1917;
  letter-spacing: -0.01em;
}

.hero-demo-phase::before {
  content: "";
  display: inline-block;
  width: 1px;
  height: 12px;
  margin-right: 14px;
  background: #D6D3D1;
  vertical-align: -1px;
}

.hero-demo-hint {
  color: #A8A29E;
}

.hero-watermark {
  position: absolute;
  left: clamp(10px, 1.6vw, 30px);
  top: 50%;
  transform: translateY(-50%);
  margin: 0;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-heading);
  font-size: clamp(56px, 6.5vw, 96px);
  font-weight: 700;
  letter-spacing: 0.32em;
  line-height: 1;
  color: #1C1917;
  opacity: 0.05;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* ═══ 4. 拟真视窗舞台（窗口直接落在 3D 网格上，无外层透明底板）═══ */
.hero-window-wrapper {
  position: relative;
  z-index: 2;
  max-width: 1060px;
  margin: 0 auto;
  background: none;
  box-shadow: none;
}

.hero-window-wrapper .app-window {
  position: relative;
  z-index: 1;
  border: 1px solid rgba(28, 25, 23, 0.08);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.95) inset,
    0 2px 4px rgba(28, 25, 23, 0.03),
    0 28px 72px -20px rgba(28, 25, 23, 0.22),
    0 12px 28px -14px rgba(28, 25, 23, 0.1);
  transform: translateY(0);
  transition: transform 0.45s var(--ease-smooth), box-shadow 0.45s var(--ease-smooth);
}

.hero-window-wrapper .app-window:hover {
  transform: translateY(-4px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.95) inset,
    0 2px 4px rgba(28, 25, 23, 0.03),
    0 36px 80px -18px rgba(28, 25, 23, 0.26),
    0 14px 32px -12px rgba(28, 25, 23, 0.12);
}

.app-window {
  position: relative;
  border: 1px solid rgba(28, 25, 23, 0.08);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.9) inset,
    0 24px 64px -16px rgba(28, 25, 23, 0.16),
    0 8px 24px -10px rgba(28, 25, 23, 0.06);
}

/* ═══ 5. 核心区块排版通用 (平衡适度呼吸感架构) ═══ */
.section {
  position: relative;
  padding: 84px 0;
  z-index: 2;
}

.section-head-center {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-sub {
  font-size: 15.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ═══ 6. Safari / shots.so 工业外壳 ═══ */
.safari-traffic {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.safari-traffic i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.12);
}
.safari-traffic i:nth-child(1) { background: #FF5F57; }
.safari-traffic i:nth-child(2) { background: #FEBC2E; }
.safari-traffic i:nth-child(3) { background: #28C840; }

.safari-chrome {
  height: 44px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(180deg, #F8FAFC 0%, #EEF2F6 100%);
  border-bottom: 1px solid rgba(15, 23, 42, 0.07);
}

.safari-nav {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.safari-nav span {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  color: #94A3B8;
  display: flex;
  align-items: center;
  justify-content: center;
}
.safari-nav svg { width: 11px; height: 11px; }

.safari-url {
  flex: 1;
  height: 26px;
  border-radius: 8px;
  background: #FFFFFF;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: #64748B;
  min-width: 0;
}
.safari-url svg { width: 10px; height: 10px; color: #94A3B8; flex-shrink: 0; }
.safari-url em { font-style: normal; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.device-safari {
  background: #FFFFFF;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 18px 40px -18px rgba(15, 23, 42, 0.22);
}

.device-desk {
  height: 100%;
  perspective: 1800px;
}
.device-safari--stage {
  height: 100%;
  transform: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    0 22px 48px -18px rgba(15, 23, 42, 0.22);
}
.device-safari--stage .safari-screen {
  flex: 1;
  min-height: 0;
  position: relative;
  background: #FAFAF9;
}

.device-safari--mini .safari-chrome { height: 32px; padding: 0 10px; gap: 8px; }
.device-safari--mini .safari-traffic i { width: 8px; height: 8px; }
.device-safari--mini .safari-url { height: 20px; font-size: 10px; border-radius: 6px; }
.device-safari--mini .safari-screen { height: 156px; padding: 14px 16px; background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%); }
.device-safari--mini:hover { transform: translateY(-3px); box-shadow: 0 22px 48px -18px rgba(15, 23, 42, 0.26); }
.device-safari--mini { transition: transform 0.25s var(--ease-smooth), box-shadow 0.25s var(--ease-smooth); }

.exo-preview { width: 100%; height: 100%; display: block; }

/* 六大外骨骼：2×3 Safari 截图画廊 */
.eco-head { margin-bottom: 36px; }
.eco-head .section-title { text-align: left; margin-bottom: 12px; }
.eco-tagline { font-size: 15px; color: var(--text-muted); max-width: 60ch; line-height: 1.7; margin: 0; }

.exo-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 22px;
}
.exo-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}
.exo-caption {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px 12px;
  align-items: start;
  padding: 0 4px;
}
.exo-idx { font-family: var(--font-mono); font-size: 11px; color: var(--text-caption); padding-top: 4px; }
.exo-main { min-width: 0; }
.exo-main h3 { font-size: 15px; font-weight: 700; margin: 0 0 4px; color: var(--text-main); }
.exo-main p { font-size: 13px; line-height: 1.55; color: var(--text-secondary); margin: 0; }
.exo-metric { text-align: right; flex-shrink: 0; }
.exo-metric b { display: block; font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--brand-blue); }
.exo-metric span { font-size: 11px; color: var(--text-caption); white-space: nowrap; }

@media (max-width: 900px) {
  .exo-list { grid-template-columns: 1fr; }
  .exo-caption { grid-template-columns: auto 1fr; }
  .exo-metric { text-align: left; grid-column: 2; }
  .device-safari--stage { transform: none; }
}

/* ═══ 7. 复杂工程持续交付 3-Tab 自动轮播 (landing style) ═══ */
.delivery-grid {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  grid-template-rows: 500px;
  gap: 24px;
  align-items: stretch;
  margin-top: 0;
}

.delivery-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 500px;
  min-height: 0;
}

.delivery-tab-btn {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 18px 20px 22px;
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  border: 1px solid rgba(231, 229, 228, 0.85);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  min-height: 0;
  transition: border-color 0.25s var(--ease-smooth), box-shadow 0.25s var(--ease-smooth);
}

.delivery-tab-btn:hover {
  box-shadow: var(--shadow-hover);
}

.delivery-tab-btn.active {
  border-color: rgba(14, 165, 233, 0.4);
  background: #FFFFFF;
  box-shadow: 0 12px 32px -4px rgba(14, 165, 233, 0.12), 0 0 0 1px rgba(14, 165, 233, 0.2);
}

.delivery-tab-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.delivery-tab-head b {
  flex: 1;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
}

.delivery-tab-badge {
  flex-shrink: 0;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.badge-blue, .badge-green, .badge-indigo { background: #F5F5F4; color: #57534E; }

.delivery-tab-btn p {
  flex: 1;
  margin: 0;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* 硬件加速平滑进度条 */
.delivery-tab-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: transparent;
}

.delivery-tab-progress i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--brand-blue);
  border-radius: 2px;
}

.delivery-tab-btn.active .delivery-tab-progress i {
  animation: tabFill 6s linear forwards;
}

@keyframes tabFill {
  from { width: 0%; }
  to { width: 100%; }
}

.delivery-viewport {
  position: relative;
  height: 500px;
  min-height: 0;
  padding: 0;
}

.delivery-card-pane {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-smooth);
}

.delivery-card-pane.active {
  opacity: 1;
  pointer-events: auto;
}

/* ═══ 8. 权威评测（版式头 + Bento 四卡，含 HumanEval-164 逐题通过矩阵）═══ */
.bench-head { margin-bottom: 32px; }
.bench-badges { display: flex; align-items: center; gap: 0; margin-bottom: 10px; }
.bench-badge { width: 32px; height: 32px; border-radius: 50%; border: 2px solid #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; color: #fff; margin-right: -8px; box-shadow: 0 2px 6px rgba(28, 25, 23, 0.12); }
.b-he, .b-gpqa, .b-ifeval { background: #1C1917; }
.bench-stars { margin-left: 20px; color: #10B981; font-size: 14px; letter-spacing: 2px; }
.bench-meta { font-size: 14px; color: #0EA5E9; font-weight: 600; margin-bottom: 14px; }

/* Bento：左侧主卡 2×2，右侧两张横卡上下叠放 */
.bench-grid.bench-bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: auto;
  gap: 16px;
  margin-bottom: 20px;
}

.bench-card {
  background: #FFFFFF;
  border-radius: 16px;
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(231, 229, 228, 0.85);
  box-shadow: 0 4px 20px rgba(28, 25, 23, 0.03);
  transition: box-shadow 0.25s, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.bench-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.08);
}

.bench-card-hero {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
  background: #FFFFFF;
  border: 1px solid rgba(231, 229, 228, 0.9);
}

.bench-card-wide {
  grid-column: 3 / 5;
  flex-direction: row;
  align-items: center;
  gap: 28px;
  background: #FFFFFF;
}

.bench-wide-left { flex: 1 1 0; min-width: 0; }
.bench-wide-left .bench-desc { margin-bottom: 0; }
.bench-wide-left .bench-name { justify-content: flex-start; }
.bench-cmp-side { flex: 0 0 280px; border-top: none; padding-top: 0; border-left: none; padding-left: 0; }

.bench-tag {
  display: inline-flex;
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 600;
  color: #0EA5E9;
  background: #F0F9FF;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.bench-card-hero .bench-tag { background: #0EA5E9; color: #fff; }
.bench-card-hero .bench-num { font-size: 72px; }

.bench-delta {
  flex: 0 0 auto;
  font-size: 12.5px;
  font-weight: 600;
  color: #059669;
  background: #ECFDF5;
  padding: 2px 8px;
  border-radius: 6px;
  line-height: 1.5;
}
.bench-delta small { font-size: 10px; margin-left: 1px; font-weight: 500; }

/* 164 题逐题通过矩阵 */
.pass-grid {
  display: grid;
  grid-template-columns: repeat(20, 1fr);
  gap: 6px;
  margin-top: auto;
  padding-top: 24px;
}

.pass-grid i {
  display: block;
  aspect-ratio: 1;
  border-radius: 2.5px;
  background: #0EA5E9;
  opacity: 0.9;
  transform: scale(1);
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s;
  cursor: pointer;
}

.pass-grid i:hover {
  transform: scale(1.4);
  box-shadow: 0 0 6px rgba(14, 165, 233, 0.6);
  z-index: 2;
}

.pass-grid i.miss { background: #D6D3D1; }
.pass-grid i.miss:hover { box-shadow: 0 0 6px rgba(148, 163, 184, 0.6); }
.pass-grid.revealed i { opacity: 1; transform: scale(1); }

.pass-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 14px;
  font-size: 12.5px;
  font-weight: 500;
  color: #44403C;
}

.pass-legend span { display: inline-flex; align-items: center; gap: 7px; }
.pass-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; box-shadow: inset 0 0 0 1px rgba(28, 25, 23, 0.06); }
.pg-pass { background: #0284C7; } .pg-miss { background: #A8A29E; } .pg-fail { background: #EF4444; }

.bench-num {
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: #1C1917;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.bench-unit { font-size: 22px; color: #78716C; margin-left: 2px; font-weight: 500; }
.bench-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; color: #1C1917; }
.bench-name > span:first-child { white-space: nowrap; }
.bench-desc { font-size: 13px; color: #78716C; margin-bottom: 20px; }

.bench-cmp {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #F8FAFC;
  border: 1px solid rgba(28, 25, 23, 0.07);
}

.bench-cmp-row {
  display: grid;
  grid-template-columns: 52px 1fr 52px;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 500;
  color: #57534E;
}

.bench-cmp-row.is-ovolve {
  color: #0C4A6E;
  font-weight: 600;
}

.bench-cmp-row b {
  text-align: right;
  font-size: 13.5px;
  font-weight: 700;
  color: #292524;
  font-variant-numeric: tabular-nums;
}

.bench-cmp-row b.up { color: #047857; }

.bench-cmp-bar {
  height: 10px;
  background: #E7E5E4;
  border-radius: 999px;
  overflow: hidden;
}

.bar-cmp-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  transition: width 1.1s cubic-bezier(0.16, 1, 0.3, 1), height 1.1s cubic-bezier(0.16, 1, 0.3, 1);
}

.fill-base { background: #78716C; }
.fill-ovolve { background: linear-gradient(90deg, #0284C7, #0EA5E9); }

/* 侧卡：截断纵轴 80–100%（标刻度），差值可读；虚线从底模柱顶拉出 */
.bench-cmp--cols {
  gap: 0;
  padding: 12px 14px 10px;
}

.bench-cols {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}

.bench-col-pair {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}

.bench-col-chart {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 6px;
  align-items: stretch;
  height: 128px;
}

.bench-col-axis {
  position: relative;
  height: 100%;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 9px;
  font-weight: 600;
  color: #A8A29E;
}

.bench-col-axis span {
  position: absolute;
  right: 0;
  transform: translateY(50%);
  line-height: 1;
}

.bench-col-plot {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  height: 100%;
  border-bottom: 1px solid rgba(28, 25, 23, 0.1);
}

.bench-col-bar {
  position: relative;
  display: flex;
  align-items: flex-end;
  width: 36px;
  height: 100%;
  border-radius: 5px 5px 2px 2px;
  background:
    repeating-linear-gradient(
      to top,
      transparent 0,
      transparent calc(25% - 1px),
      rgba(28, 25, 23, 0.06) calc(25% - 1px),
      rgba(28, 25, 23, 0.06) 25%
    );
  overflow: hidden;
  z-index: 1;
}

.bench-col-bar .bar-cmp-fill {
  width: 100%;
  height: 0;
  border-radius: 4px 4px 1px 1px;
}

.bench-col-bar .fill-ovolve {
  background: linear-gradient(180deg, #38BDF8 0%, #0284C7 100%);
}

/* 净增带：底模虚线以上的 Ovolve 段 */
.bench-col-gain {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 2;
  box-sizing: border-box;
  background: repeating-linear-gradient(
    -45deg,
    rgba(14, 165, 233, 0.35),
    rgba(14, 165, 233, 0.35) 3px,
    rgba(255, 255, 255, 0.55) 3px,
    rgba(255, 255, 255, 0.55) 6px
  );
  border: 1.5px dashed #0369A1;
  border-bottom: 0;
  border-radius: 4px 4px 0 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, height 0.9s cubic-bezier(0.16, 1, 0.3, 1), bottom 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.bench-col-chart.is-on .bench-col-gain {
  opacity: 1;
}

/* 从底模柱顶出发，水平穿过两根柱 */
.bench-col-guide {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 3;
  height: 0;
  border-top: 1.5px dashed #0369A1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease, bottom 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.bench-col-chart.is-on .bench-col-guide {
  opacity: 1;
}

.bench-col-meta {
  display: flex;
  justify-content: center;
  gap: 5px;
  padding-left: 34px;
}

.bench-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 41px;
}

.bench-col b {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #57534E;
  font-variant-numeric: tabular-nums;
}

.bench-col.is-win b {
  color: #0C4A6E;
}

.bench-col em {
  font-style: normal;
  font-size: 11px;
  font-weight: 500;
  color: #A8A29E;
}

.bench-col.is-win em {
  color: #0369A1;
  font-weight: 600;
}

.bench-cols-gain {
  margin: 0;
  text-align: center;
  font-size: 11.5px;
  font-weight: 500;
  color: #78716C;
}

.bench-cols-gain strong {
  color: #047857;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.table-card {
  background: #FFFFFF;
  border: 1px solid rgba(231, 229, 228, 0.85);
  border-radius: 20px;
  overflow: hidden;
  overflow-x: auto;
  box-shadow: 0 4px 20px rgba(28, 25, 23, 0.03);
}

.data-table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
.data-table th {
  background: #FAFAF9;
  padding: 14px 22px;
  font-size: 13px;
  font-weight: 600;
  color: #57534E;
  border-bottom: 1px solid rgba(231, 229, 228, 0.9);
}
.data-table th:nth-child(3) { color: #78716C; }
.data-table th:nth-child(4) {
  color: #0C4A6E;
  background: #E0F2FE;
}
.data-table th:nth-child(5) {
  color: #047857;
  background: #ECFDF5;
}
.data-table td { padding: 16px 22px; font-size: 14px; color: #44403C; border-bottom: 1px solid rgba(231, 229, 228, 0.7); }
.data-table tr:last-child td { border-bottom: none; }
.data-table td b { color: #1C1917; font-weight: 600; }
.data-table td.td-base {
  color: #78716C;
  font-variant-numeric: tabular-nums;
}
.data-table td.td-ovolve {
  background: #F0F9FF;
  color: #0C4A6E;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.data-table td.td-ovolve b { color: #0C4A6E; font-weight: 700; }
.data-table td.up {
  background: #ECFDF5;
  color: #047857;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 960px) {
  .bench-grid.bench-bento { grid-template-columns: 1fr; }
  .bench-card-hero { grid-column: auto; grid-row: auto; }
  .bench-card-wide { grid-column: auto; flex-direction: column; align-items: stretch; }
  .bench-cmp-side { border-left: none; padding-left: 0; border-top: 1px solid rgba(231, 229, 228, 0.9); padding-top: 16px; }
}

/* ═══ 9. 场景跑马灯与剪贴板 Toast (landing style) ═══ */
.ov-marquee-port {
  position: relative;
  overflow: hidden;
  width: 100%;
  padding: 12px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.ov-marquee-rail {
  display: flex;
  gap: 14px;
  width: max-content;
  margin-bottom: 14px;
}

.ov-marquee-rail--a {
  animation: marqueeLeft 52s linear infinite;
}

.ov-marquee-rail--b {
  animation: marqueeRight 56s linear infinite;
}

.ov-marquee-rail:hover {
  animation-play-state: paused;
}

@keyframes marqueeLeft {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes marqueeRight {
  from { transform: translateX(-50%); }
  to { transform: translateX(0); }
}

.scene-card {
  width: 320px;
  flex-shrink: 0;
  background: #FFFFFF;
  border: 1px solid rgba(231, 229, 228, 0.85);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s;
  cursor: pointer;
}

.scene-card:hover {
  transform: translateY(-2px);
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow-hover);
}

.scene-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.card-icon svg {
  width: 16px;
  height: 16px;
  color: var(--brand-blue);
}

.scene-card p {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.copy-btn {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: #FAFAF9;
  border: 1px solid rgba(231, 229, 228, 0.8);
  transition: all 0.15s;
}

.copy-btn svg {
  width: 12px;
  height: 12px;
}

.scene-card:hover .copy-btn {
  color: var(--brand-blue);
  background: #F0F9FF;
  border-color: rgba(14, 165, 233, 0.2);
}

/* 顶部深色剪贴板 Toast () */
.ov-copy-toast {
  position: fixed;
  top: 86px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: #1C1917;
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 12px 32px rgba(28, 25, 23, 0.22);
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: opacity 0.25s var(--ease-smooth), transform 0.25s var(--ease-smooth);
}

.ov-copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ═══ 10. 常见问题 FAQ（两栏细线手风琴）═══ */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.two-col-faq {
  grid-template-columns: 1fr 1.4fr;
  gap: 52px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid #E7E5E4;
  background: transparent;
  border-top: none;
  border-left: none;
  border-right: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
}

.faq-item[open] {
  border-color: #E7E5E4;
  box-shadow: none;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 500;
  color: #1C1917;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 300;
  color: #78716C;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  content: "+";
}

.faq-item p {
  padding: 0 32px 18px 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #57534E;
  margin: 0;
}

.faq-item code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: #FAFAF9;
  padding: 1px 6px;
  border-radius: 4px;
}

/* ═══ 11. 底部 CTA ═══ */
.section-cta {
  padding: 24px 0 80px;
}

.gray-panel {
  position: relative;
  background: #F5F5F4;
  border: 1px solid #E7E5E4;
  border-radius: 16px;
  padding: 60px 48px;
  overflow: hidden;
}

.gray-panel-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 64px 36px;
  gap: 10px;
}

.cta-title {
  font-family: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 34px;
  font-weight: 500;
  margin-top: 20px;
  color: #1C1917;
}

.cta-sub {
  font-size: 15px;
  color: #57534E;
  margin-bottom: 16px;
}

/* 字标 */
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.wordmark-icon {
  width: 52px;
  height: 52px;
}

.wordmark-text {
  font-family: "Arial Black", "Segoe UI Black", "Helvetica Neue", Arial, sans-serif;
  font-weight: 900;
  font-size: 52px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: #1C1917;
}

.wordmark-accent {
  width: 14px;
  height: 14px;
  background: #0EA5E9;
  border-radius: 2px;
  align-self: flex-end;
  margin-bottom: 4px;
  transform: skewX(-12deg);
}

.wordmark-lg .wordmark-icon {
  width: 64px;
  height: 64px;
}

.wordmark-lg .wordmark-text {
  font-size: 64px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
}

.hero-actions-center {
  justify-content: center;
}

/* 按钮：墨色主按钮 + 细线次按钮，10px 圆角（非胶囊） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.15s ease;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid #1C1917;
  outline-offset: 3px;
}

.btn-primary {
  background: #1C1917;
  color: #fff;
  box-shadow: none;
}

.btn-primary:hover {
  background: #292524;
}

.btn-outline {
  background: #FFFFFF;
  color: #1C1917;
  border-color: #E7E5E4;
  font-weight: 600;
}

.btn-outline:hover {
  background: #FAFAF9;
  color: #1C1917;
  border-color: #D6D3D1;
}

.ov-plat-wrap {
  position: relative;
  display: inline-block;
  z-index: 30;
}

.ov-plat-menu--up {
  position: absolute;
  top: auto;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(6px) scale(0.98);
  width: 260px;
  padding: 6px;
  background: #fff;
  border: 1px solid #E7E5E4;
  border-radius: 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}

.ov-plat-menu--up.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.site-footer {
  padding: 32px 0;
  border-top: 1px solid rgba(231, 229, 228, 0.7);
  font-size: 13px;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-logo {
  width: 20px;
  height: 20px;
  border-radius: 5px;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-right a:hover {
  color: var(--brand-blue);
}

@media (max-width: 960px) {
  .hero { padding-top: 120px; }
  .hero-stage-container { margin-top: 48px; }
  .section { padding: 60px 0; }
  .section-head-center { margin-bottom: 32px; }
  .header-nav { display: none; }
  .delivery-grid { grid-template-columns: 1fr; grid-template-rows: none; }
  .delivery-nav { height: auto; }
  .delivery-viewport { height: 420px; }
  .gepa-pareto-box { grid-template-columns: 1fr; }
  .bench-grid { grid-template-columns: 1fr; }
  .two-col-faq { grid-template-columns: 1fr; }
  .dispersion-stage { transform: scale(0.85); transform-origin: center center; }
}



/* ═══ cta-whisper：转化钩子一行（克制层级，弱化色） ═══ */
.cta-whisper{margin:18px 0 24px;font-size:13px;letter-spacing:.04em;color:rgba(20,24,28,.45);}
.cta-whisper::before{content:"— ";opacity:.55;}
.cta-whisper::after{content:" —";opacity:.55;}

/* watermark 竖排轨：窄屏收起 */
@media (max-width: 900px){ .hero-watermark{ display:none; } }


/* ═══ hero-wave：原版 3D Wave Grid（仅 Hero 背景层） ═══ */
.hero-wave-layer{
  position:absolute;
  inset:0;
  height:100%;
  min-height:100%;
  overflow:hidden;
  z-index:0;
  pointer-events:none; /* 点击穿透；波纹用 window pointermove */
  mask-image:linear-gradient(to bottom, black 62%, transparent 100%);
  -webkit-mask-image:linear-gradient(to bottom, black 62%, transparent 100%);
}
.hero-wave-layer canvas{
  width:100%;
  height:100%;
  display:block;
}
.hero > .container{ position:relative; z-index:2; }
.hero-stage-container{position:relative; z-index:2;}
.hero-stage-container > .container{position:relative;z-index:2;}