/* ============================================================
   百数云科技 · 企业官网现代视觉与动效系统 (2026 Modern SaaS & AI Standard)
   ============================================================ */

:root {
  /* Brand Core */
  --ink-bg: #0d1a30;
  --ink: #0f1d38;
  --ink-2: #152747;
  --ink-3: #22375d;
  --ink-4: #475569;
  --ink-5: #94a3b8;
  --paper: #ffffff;
  --bg-slate: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-ice: #f0f7ff;
  --bg-azure-soft: linear-gradient(180deg, #f0f7ff 0%, #f9fcff 100%);
  --bg-tech-light: linear-gradient(180deg, #edf5fe 0%, #f7fbfe 100%);
  --bg-pearl-slate: linear-gradient(180deg, #f8fafc 0%, #eef3f9 100%);
  --bg-emerald-soft: linear-gradient(180deg, #f0fdf6 0%, #f9fdfb 100%);
  --bg-dark-section: linear-gradient(165deg, #091326 0%, #0d1a33 60%, #0a1428 100%);
  --line: #e2e8f0;
  --line-dark: rgba(255, 255, 255, 0.12);

  /* Accents - Imperial Champagne Gold (Used strictly for AI Metadata Engine Flagship Accent) */
  --bronze: #d97706;
  --bronze-bright: #f59e0b;
  --bronze-glow: rgba(245, 158, 11, 0.28);
  --bronze-lit: #fde68a;
  --bronze-bg: #fffbeb;

  /* Product Colors */
  --blue: #2563eb;
  --blue-glow: rgba(37, 99, 235, 0.3);
  --blue-bg: #eff6ff;
  --blue-lit: #dbeafe;

  --purple: #0284c7;
  --purple-glow: rgba(2, 132, 199, 0.28);
  --purple-bg: #f0f9ff;
  --purple-lit: #e0f2fe;

  --teal: #0d9488;
  --teal-glow: rgba(13, 148, 136, 0.3);
  --teal-bg: #f0fdfa;
  --teal-lit: #ccfbf1;

  --success: #10b981;
  --success-bg: #ecfdf5;

  /* Gradients - High-Contrast Enterprise Sapphire & Electric Cyan Baseline */
  --grad-hero: radial-gradient(circle at 85% 20%, rgba(14, 165, 233, 0.22) 0%, transparent 50%),
               radial-gradient(circle at 15% 75%, rgba(37, 99, 235, 0.22) 0%, transparent 50%),
               radial-gradient(circle at 50% 30%, rgba(2, 132, 199, 0.18) 0%, transparent 60%),
               linear-gradient(170deg, #091326 0%, #0e1e3e 45%, #142852 80%, #0f1f42 100%);
  --grad-bronze: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  /* 浅色背景标题强调词渐变（高饱和度深蓝到电光海蓝，从第一个字开始绝对清晰） */
  --grad-title: linear-gradient(120deg, #1d4ed8 0%, #2563eb 50%, #0284c7 100%);
  /* 暗色背景标题强调词渐变（高对比度冰川天青到电光蓝） */
  --grad-title-bright: linear-gradient(120deg, #e0f2fe 0%, #7dd3fc 45%, #38bdf8 100%);
  --grad-blue: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  --grad-purple: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  --grad-card-dark: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px rgba(10, 20, 40, 0.08);
  --shadow-lg: 0 20px 50px rgba(10, 20, 40, 0.12);
  --shadow-glow-bronze: 0 10px 30px rgba(245, 158, 11, 0.32);
  --shadow-glow-blue: 0 10px 30px rgba(37, 99, 235, 0.3);

  /* Typography */
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Songti SC", "STSong", "Georgia", serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;

  /* Layout */
  --max-w: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

/* ==========================================
   RESET & GLOBAL BASE
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
  /* 注意：不要在 html/body 上加 overflow-x（hidden/clip 都会破坏 position: sticky 导航固定）；
     横向溢出已通过 .nav-links 的 transform 方案 + body 原有 overflow-x:hidden 解决 */
}

body {
  font-family: var(--font-sans);
  color: var(--ink-3);
  background-color: var(--paper);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Scroll progress bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #38bdf8, #6366f1, #3b82f6);
  z-index: 1000;
  transition: width 0.1s linear;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.6);
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.container-sm {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================
   TOP NOTIFICATION BANNER
   ========================================== */
.top-banner {
  background: linear-gradient(90deg, #091326 0%, #0e1e3e 50%, #091326 100%);
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
  padding: 8px 16px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  background: linear-gradient(135deg, #38bdf8 0%, #4f46e5 100%);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.4);
}

.banner-link {
  color: #38bdf8;
  font-weight: 600;
  margin-left: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.banner-link:hover {
  text-decoration: underline;
  color: #7dd3fc;
}

/* ==========================================
   NAVIGATION BAR
   ========================================== */
.nav {
  position: sticky;
  top: 0;
  /* 不用 backdrop-filter：它会让内部 fixed 折叠菜单的包含块变成 .nav 本身，
     导致移动端菜单参与滚动区、撑宽文档（横向溢出）。改用更高不透明背景保持观感 */
  background: rgba(12, 25, 51, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 200;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 12px 0;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.98);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  padding: 10px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  transition: transform 0.2s ease;
}
.logo:hover {
  transform: scale(1.02);
}

.logo img {
  height: 40px;
  width: auto;
  border-radius: 6px;
}

/* Dark header: 顶部深色导航直接用白色 logo（透明底，融入背景，无白方块）；
   Scrolled（导航变白）后切回彩色 logo */
.nav:not(.scrolled) .logo {
  background: transparent;
  padding: 6px 0;
  box-shadow: none;
  transition: background 0.35s ease, padding 0.35s ease, box-shadow 0.35s ease;
}
.nav:not(.scrolled) .logo:hover { transform: none; }   /* 覆盖默认 hover 缩放，避免抖动 */
/* Scrolled 状态：白底 nav，恢复彩色 logo */
.nav.scrolled .logo {
  background: transparent;
  padding: 6px 0;
  box-shadow: none;
}

/* Nav Links on Dark / Light header */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  font-size: 14.5px;
  font-weight: 600;
}

.nav-links > li {
  position: relative;
}

.nav-links > li > a {
  color: rgba(255, 255, 255, 0.88);
  padding: 8px 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.nav.scrolled .nav-links > li > a {
  color: var(--ink-3);
}

.nav-links > li > a:hover,
.nav-links > li > a.active {
  color: #93c5fd;
}

.nav.scrolled .nav-links > li > a:hover,
.nav.scrolled .nav-links > li > a.active {
  color: var(--blue);
}

/* Underline indicator on active */
.nav-links > li > a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 6px;
  right: 6px;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #6366f1);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.25s ease;
}
.nav-links > li > a:hover::after,
.nav-links > li > a.active::after {
  transform: scaleX(1);
}

/* Products Mega Dropdown */
.nav-links > li.has-dropdown {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: -10px;
}

.nav-links > li.has-dropdown > a::after {
  content: "▾";
  font-size: 10px;
  margin-left: 4px;
  transition: transform 0.25s ease;
  display: inline-block;
  background: none;
  height: auto;
  position: static;
  transform: none;
}
.nav-links > li.has-dropdown:hover > a::after,
.nav-links > li.has-dropdown.is-open > a::after {
  transform: rotate(180deg);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: -40px;
  width: 520px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: 0 25px 60px rgba(10, 20, 40, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.05);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.98);
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.2s;
  pointer-events: none;
  z-index: 220;
}

/* Invisible hover bridge connecting the navbar item to the dropdown menu seamlessly */
.dropdown::before {
  content: "";
  position: absolute;
  top: -24px;
  left: -20px;
  right: -20px;
  height: 32px;
  display: block;
  background: transparent;
  pointer-events: auto;
}

.nav-links > li.has-dropdown:hover .dropdown,
.nav-links > li.has-dropdown.is-open .dropdown,
.nav-links > li.has-dropdown:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px) scale(1);
  pointer-events: auto;
}

.dd-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.dd-kicker {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--blue);
  font-weight: 800;
}

.dd-head-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.dd-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  margin-bottom: 4px;
}
.dd-item:hover {
  background: var(--bg-subtle);
  transform: translateX(4px);
}

/* "Featured" dd-item (e.g. current flagship on /metadata-engine/) — uses a
   subtle light background on desktop to draw the eye, but the mobile drawer
   has a dark backdrop, so reset that highlight there. */
.dd-item-featured {
  background-color: var(--bg-subtle);
}

.dd-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  flex-shrink: 0;
}
.dd-icon.blue { background: var(--blue-bg); color: var(--blue); }
.dd-icon.purple { background: var(--purple-bg); color: var(--purple); }
.dd-icon.bronze { background: #eef2ff; color: #4f46e5; }
.dd-icon.teal { background: var(--teal-bg); color: var(--teal); }

.dd-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dd-sub {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-subtle);
  color: var(--ink-4);
  font-weight: 700;
}

.dd-name .flag {
  font-size: 10px;
  background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
  color: #fff;
  padding: 1px 6px;
  border-radius: 100px;
  font-weight: 800;
}

.dd-tag {
  font-size: 12px;
  color: var(--ink-4);
  line-height: 1.4;
  margin-top: 2px;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-nav-cta {
  background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 55%, #1d4ed8 100%);
  color: #ffffff !important;
  font-size: 13.5px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 100px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  overflow: hidden;
}
.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.5);
}
.btn-nav-cta::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}
.btn-nav-cta:hover::after { left: 160%; }

/* Mobile Toggle Hamburger */
  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    position: relative;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.22);
  }
  .nav.scrolled .nav-toggle {
    border-color: rgba(34, 55, 93, 0.18);
    background: rgba(34, 55, 93, 0.04);
  }
.nav-toggle span {
  position: absolute;
  width: 20px;
  height: 2px;
  background: #ffffff;
  transition: all 0.3s ease;
}
.nav.scrolled .nav-toggle span {
  background: var(--ink);
}
.nav-toggle span:nth-child(1) { transform: translateY(-6px); }
  .nav-toggle span:nth-child(2) { transform: translateY(0); }
  .nav-toggle span:nth-child(3) { transform: translateY(6px); }

  /* X close state — make the two crossing bars a touch thicker and longer,
     set a clear transform-origin so they spin on the bar's midpoint (always
     reads as an X even mid-animation). */
  .nav-toggle span {
    transform-origin: center center;
    border-radius: 1px;
  }
  .nav-toggle.is-open span:nth-child(1) { transform: rotate(45deg); background: #ffffff; }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: rotate(-45deg); background: #ffffff; }

/* ==========================================
   HERO SECTION (THE LIVE STAGE)
   ========================================== */
.hero {
  position: relative;
  background: var(--grad-hero);
  color: #ffffff;
  padding: 70px 0 90px;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.8;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 56px;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #c7d2fe;
  margin-bottom: 22px;
  backdrop-filter: blur(10px);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero h1 {
  font-size: clamp(34px, 4.4vw, 54px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero h1 em {
  font-style: normal;
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-sub {
  font-size: clamp(15.5px, 1.5vw, 18px);
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-cta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 55%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(37, 99, 235, 0.5);
}
.btn-primary:hover::after { left: 160%; }

.btn-glass {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  backdrop-filter: blur(10px);
}
.btn-glass:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.btn-bronze {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
}
.btn-bronze::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}
.btn-bronze:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(245, 158, 11, 0.55);
}
.btn-bronze:hover::after { left: 160%; }

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--ink-2);
  border: 1px solid var(--line);
}
.btn-secondary:hover {
  background: #ffffff;
  border-color: var(--ink-4);
}

/* Stats Counter Row */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat .h-v {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 800;
  color: #ffffff;
  font-family: var(--font-serif);
  line-height: 1.1;
}

.hero-stat .h-l {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

/* ==========================================
   ENTERPRISE CONSOLE & SCREENSHOT STYLING (MODERN B2B)
   ========================================== */
.hero-stage {
  background: rgba(15, 28, 56, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: 0 28px 80px rgba(6, 14, 34, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  overflow: hidden;
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.hero-stage:hover {
  border-color: rgba(255, 255, 255, 0.28);
  box-shadow: 0 35px 95px rgba(6, 14, 34, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.hero-stage-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 18px;
  background: rgba(8, 16, 36, 0.45);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.window-dots {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.window-dots::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite ease-in-out;
}
.window-dots span {
  display: none;
}
.window-dots::after {
  content: "LIVE SANDBOX";
  font-size: 10.5px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.08em;
}

.stage-title {
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.stage-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-lit);
  box-shadow: 0 0 6px var(--teal-lit);
}

/* Stage Tabs */
.hero-stage-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(8, 16, 34, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 8px 0;
  gap: 6px;
}

.hero-tab-btn {
  padding: 10px 8px;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.65);
  border-radius: 8px 8px 0 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  background: transparent;
}

.hero-tab-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.hero-tab-btn.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.hero-tab-btn.active[data-tab="bi"] { 
  border-bottom: 2px solid #38bdf8; 
  color: #e0f2fe; 
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.15) 0%, rgba(56, 189, 248, 0.03) 100%);
}
.hero-tab-btn.active[data-tab="sales"] { 
  border-bottom: 2px solid #38bdf8; 
  color: #e0f2fe; 
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.15) 0%, rgba(56, 189, 248, 0.03) 100%);
}
.hero-tab-btn.active[data-tab="meta"] { 
  border-bottom: 2px solid #fbbf24; 
  color: #fef3c7; 
  background: linear-gradient(180deg, rgba(251, 191, 36, 0.18) 0%, rgba(251, 191, 36, 0.03) 100%);
}
.hero-tab-btn.active[data-tab="fde"] { 
  border-bottom: 2px solid #2dd4bf; 
  color: #ccfbf1; 
  background: linear-gradient(180deg, rgba(45, 212, 191, 0.15) 0%, rgba(45, 212, 191, 0.03) 100%);
}

.tab-badge {
  font-size: 9.5px;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.hero-tab-btn.active[data-tab="bi"] .tab-badge { background: rgba(56, 189, 248, 0.25); color: #bae6fd; }
.hero-tab-btn.active[data-tab="sales"] .tab-badge { background: rgba(56, 189, 248, 0.25); color: #bae6fd; }
.hero-tab-btn.active[data-tab="meta"] .tab-badge { background: rgba(251, 191, 36, 0.25); color: #fef08a; }
.hero-tab-btn.active[data-tab="fde"] .tab-badge { background: rgba(45, 212, 191, 0.25); color: #99f6e4; }

/* Stage Panels */
.hero-stage-body {
  padding: 22px;
  min-height: 340px;
  position: relative;
  background: rgba(12, 23, 46, 0.2);
}

.hero-tab-panel {
  display: none;
  animation: fadeIn 0.35s ease;
}

.hero-tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Tab 1: BI Preview */
.bi-mock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 14px;
}

.bi-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.bi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.22);
}

.bi-card-title {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 6px;
}

.bi-card-val {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-serif);
  color: #ffffff;
  letter-spacing: -0.02em;
}
.bi-card-val.trend-up {
  color: #34d399;
}

/* 浅色卡片（未加 dark-theme）下 BI 看板卡片适配：修复白底白字 */
.dd-visual-card:not(.dark-theme) .bi-card {
  background: var(--bg-slate);
  border-color: var(--line);
  box-shadow: 0 2px 10px rgba(10, 20, 40, 0.06);
}
.dd-visual-card:not(.dark-theme) .bi-card:hover {
  border-color: #cbd5e1;
}
.dd-visual-card:not(.dark-theme) .bi-card-title {
  color: var(--ink-4);
}
.dd-visual-card:not(.dark-theme) .bi-card-val {
  color: var(--ink);
}
.dd-visual-card:not(.dark-theme) .bi-card-val.trend-up {
  color: #10b981;
}

.bi-chart-container {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.bi-chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 105px;
  padding-top: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 8px;
}

.bi-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  height: 100%;
  justify-content: flex-end;
}

.bi-demo-bar {
  width: 100%;
  background: linear-gradient(180deg, #60a5fa 0%, #2563eb 100%);
  border-radius: 4px 4px 0 0;
  transition: height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.bi-bar-label {
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 600;
}

/* Tab 2: AI Sales Preview */
.sales-chat-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.sales-chips-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.sales-chip {
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}
.sales-chip:hover {
  background: rgba(14, 165, 233, 0.25);
  border-color: #38bdf8;
  color: #ffffff;
  transform: translateY(-1px);
}
.sales-chip.active {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #fff;
  border-color: #7dd3fc;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
}

.sales-lead-list {
  display: grid;
  gap: 10px;
}

.sales-lead-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  font-size: 13px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.sales-lead-row:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(3px);
}

.sales-lead-score {
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 11px;
  letter-spacing: 0.03em;
}
.score-high { background: rgba(16, 185, 129, 0.25); color: #34d399; border: 1px solid rgba(52, 211, 153, 0.3); }
.score-mid { background: rgba(245, 158, 11, 0.25); color: #fbbf24; border: 1px solid rgba(251, 191, 36, 0.3); }

/* Tab 3: Metadata Engine Preview */
.meta-stage-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.meta-box {
  width: 100%;
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.meta-box:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.22);
}

.meta-box.highlight {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.22) 0%, rgba(217, 119, 6, 0.15) 100%);
  border-color: #f59e0b;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.meta-flow-arrow {
  color: var(--bronze-lit);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 8px;
}
.meta-flow-arrow::before, .meta-flow-arrow::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: rgba(253, 230, 138, 0.3);
}

/* Tab 4: FDE Timeline */
.fde-mini-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.fde-mini-step {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 14px 10px;
  text-align: center;
  transition: all 0.2s ease;
  position: relative;
}
.fde-mini-step:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #2dd4bf;
  transform: translateY(-2px);
}

.fde-step-badge {
  font-size: 11px;
  color: var(--teal-lit);
  font-weight: 800;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  background: rgba(13, 148, 136, 0.25);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
}

/* ==========================================
   TRUST LOGO & INDUSTRY TICKER BAR
   ========================================== */
.trust-bar {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
  position: relative;
  overflow: hidden;
}

.trust-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(59, 130, 246, 0.25) 50%, transparent 100%);
}

.trust-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.trust-title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.trust-title::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3b82f6;
  box-shadow: 0 0 8px #3b82f6;
}

.trust-chips {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1;
}

.trust-chip {
  padding: 6px 14px;
  border-radius: 100px;
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: default;
}

.trust-chip .dot-indicator,
.trust-chip strong {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3b82f6;
  box-shadow: 0 0 6px rgba(59, 130, 246, 0.6);
  font-size: 0;
  line-height: 0;
  color: transparent;
  flex-shrink: 0;
}

.trust-chip:hover {
  background: #ffffff;
  border-color: #93c5fd;
  color: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
}

.trust-chip:hover .dot-indicator,
.trust-chip:hover strong {
  background: #2563eb;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.8);
  transform: scale(1.25);
}

/* ==========================================
   SECTION COMMON STYLES & MODULE BACKGROUNDS
   ========================================== */
.sec {
  padding: 96px 0;
  position: relative;
}

.sec.alt {
  background: var(--bg-slate);
}

.sec.dark {
  background: var(--bg-dark-section);
  color: #ffffff;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Individual Homepage Section Backgrounds */
#products {
  background: #ffffff;
}

#p-bi {
  background: linear-gradient(180deg, #f0f8ff 0%, #f9fcff 100%);
  border-top: 1px solid rgba(2, 132, 199, 0.1);
  border-bottom: 1px solid rgba(2, 132, 199, 0.08);
}

#p-sales {
  background: #ffffff;
}

#p-meta {
  background: linear-gradient(180deg, #edf5fd 0%, #f7faff 100%);
  border-top: 1px solid rgba(37, 99, 235, 0.12);
  border-bottom: 1px solid rgba(37, 99, 235, 0.1);
}

#p-fde {
  background: #ffffff;
}

#roi-calc {
  background: linear-gradient(180deg, #f3f6fa 0%, #ebf1f8 100%);
  border-top: 1px solid rgba(203, 213, 225, 0.8);
  border-bottom: 1px solid rgba(203, 213, 225, 0.8);
}

#cases {
  background: #ffffff;
}

#why {
  background: linear-gradient(165deg, #07101e 0%, #0c1832 60%, #0a1428 100%);
  color: #ffffff;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#process {
  background: linear-gradient(180deg, #f6f9fc 0%, #ffffff 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
}

#faq {
  background: #f8fafc;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

#leadgen {
  background: linear-gradient(180deg, #edf3fa 0%, #f6f9fc 100%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

#about {
  background: linear-gradient(180deg, #f1f5f9 0%, #e9edf4 100%);
}

.sec-head {
  text-align: center;
  max-width: 940px;
  margin: 0 auto 56px;
}

.sec-head.left {
  text-align: left;
  margin-left: 0;
}

.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #1d4ed8;
  text-transform: uppercase;
  margin-bottom: 12px;
  background: #eff6ff;
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 4px 12px;
  border-radius: 100px;
}

.sec.dark .sec-tag {
  background: rgba(37, 99, 235, 0.2);
  color: #93c5fd;
  border: 1px solid rgba(96, 165, 250, 0.35);
}

.sec-head h2 {
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.22;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

.sec.dark .sec-head h2 {
  color: #ffffff;
}

.sec-head h2 em {
  font-style: normal;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sec.dark .sec-head h2 em {
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
#why .sec-head h2 em {
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sec-head p {
  font-size: 16.5px;
  color: var(--ink-4);
  line-height: 1.7;
}

.sec.dark .sec-head p {
  color: rgba(255, 255, 255, 0.7);
}

/* ==========================================
   PRODUCT PORTFOLIO CARDS (4 CARDS) - REFINED MODERN ENTERPRISE
   ========================================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.prod-card {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: 16px;
  padding: 30px 24px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
  overflow: hidden;
}

/* No thick border lines on top */
.prod-card::before {
  display: none;
}

.prod-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 32px -8px rgba(15, 23, 42, 0.08), 0 8px 16px -4px rgba(15, 23, 42, 0.03);
}

.prod-card.blue:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 20px 35px -8px rgba(37, 99, 235, 0.12), 0 8px 16px -4px rgba(37, 99, 235, 0.04);
}

.prod-card.purple:hover {
  border-color: rgba(2, 132, 199, 0.35);
  box-shadow: 0 20px 35px -8px rgba(2, 132, 199, 0.12), 0 8px 16px -4px rgba(2, 132, 199, 0.04);
}

.prod-card.bronze {
  background: linear-gradient(180deg, #fffdfa 0%, #ffffff 100%);
  border-color: rgba(245, 158, 11, 0.28);
  box-shadow: 0 6px 24px -2px rgba(245, 158, 11, 0.08), 0 2px 6px -1px rgba(245, 158, 11, 0.03);
}

.prod-card.bronze:hover {
  border-color: rgba(245, 158, 11, 0.55);
  box-shadow: 0 20px 35px -8px rgba(245, 158, 11, 0.16), 0 8px 16px -4px rgba(245, 158, 11, 0.06);
}

.prod-card.teal:hover {
  border-color: rgba(13, 148, 136, 0.35);
  box-shadow: 0 20px 35px -8px rgba(13, 148, 136, 0.12), 0 8px 16px -4px rgba(13, 148, 136, 0.04);
}

.card-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.prod-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: transform 0.25s ease;
}

.prod-icon-box svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
  transition: transform 0.25s ease;
}

.tab-nav-icon {
  width: 15px;
  height: 15px;
  display: inline-block;
  vertical-align: -2px;
  margin-right: 4px;
  stroke-width: 2.2;
}

.dock-icon {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.inline-ui-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: -2px;
  stroke-width: 2.2;
}

.prod-card:hover .prod-icon-box {
  transform: scale(1.06);
}

.prod-card.blue .prod-icon-box { 
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%); 
  color: var(--blue); 
  border-color: rgba(37, 99, 235, 0.15);
}
.prod-card.purple .prod-icon-box { 
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%); 
  color: var(--purple); 
  border-color: rgba(2, 132, 199, 0.15);
}
.prod-card.bronze .prod-icon-box { 
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%); 
  color: #d97706; 
  border-color: rgba(245, 158, 11, 0.25);
}
.prod-card.teal .prod-icon-box { 
  background: linear-gradient(135deg, #f0fdfa 0%, #ccfbf1 100%); 
  color: var(--teal); 
  border-color: rgba(13, 148, 136, 0.15);
}

.card-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 100px;
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
}
.card-badge.flag { 
  background: rgba(245, 158, 11, 0.12); 
  color: #b45309; 
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.card-badge.hot { 
  background: var(--bg-slate); 
  color: var(--ink-4); 
  border: 1px solid var(--line);
}
.prod-card.blue .card-badge.hot {
  background: rgba(37, 99, 235, 0.08);
  color: var(--blue);
  border-color: rgba(37, 99, 235, 0.2);
}
.prod-card.purple .card-badge.hot {
  background: rgba(2, 132, 199, 0.08);
  color: var(--purple);
  border-color: rgba(2, 132, 199, 0.2);
}
.prod-card.teal .card-badge.hot {
  background: rgba(13, 148, 136, 0.08);
  color: var(--teal);
  border-color: rgba(13, 148, 136, 0.2);
}

.prod-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.prod-card-type {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-5);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.prod-card p {
  font-size: 13.5px;
  color: var(--ink-4);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.prod-card-feats {
  list-style: none;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.prod-card-feats li {
  font-size: 12.5px;
  color: var(--ink-3);
  position: relative;
  padding-left: 18px;
  line-height: 1.5;
}

.prod-card-feats li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-weight: 800;
  font-size: 12px;
  color: var(--ink-5);
}
.prod-card.blue .prod-card-feats li::before { color: var(--blue); }
.prod-card.purple .prod-card-feats li::before { color: var(--purple); }
.prod-card.bronze .prod-card-feats li::before { color: var(--bronze); }
.prod-card.teal .prod-card-feats li::before { color: var(--teal); }

.prod-card-link {
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink);
  transition: gap 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s ease;
  margin-top: auto;
}
.prod-card:hover .prod-card-link {
  gap: 8px;
}
.prod-card.blue .prod-card-link { color: var(--blue); }
.prod-card.purple .prod-card-link { color: var(--purple); }
.prod-card.bronze .prod-card-link { color: var(--bronze); }
.prod-card.teal .prod-card-link { color: var(--teal); }

/* ==========================================
   PRODUCT DEEP DIVE SECTIONS
   ========================================== */
.deep-dive-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.deep-dive-grid.reverse {
  direction: rtl;
}
.deep-dive-grid.reverse > * {
  direction: ltr;
}

.dd-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 16px;
}
.dd-badge-pill.blue { background: var(--blue-bg); color: var(--blue); }
.dd-badge-pill.purple { background: var(--purple-bg); color: var(--purple); }
.dd-badge-pill.bronze { background: var(--bronze-bg); color: var(--bronze); }
.dd-badge-pill.teal { background: var(--teal-bg); color: var(--teal); }

.dd-content h2 {
  font-size: clamp(28px, 3.2vw, 38px);
  line-height: 1.25;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 16px;
}
.dd-content h2 em {
  font-style: normal;
}
.dd-content h2.blue em { color: var(--blue); }
.dd-content h2.purple em { color: var(--purple); }
.dd-content h2.bronze em {
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.dd-content h2.teal em { color: var(--teal); }

.dd-desc {
  font-size: 16px;
  color: var(--ink-4);
  line-height: 1.75;
  margin-bottom: 24px;
}

.dd-checklist {
  list-style: none;
  margin-bottom: 28px;
}

.dd-checklist li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-size: 15px;
  color: var(--ink-2);
  border-bottom: 1px dashed var(--line);
}
.dd-checklist li:last-child {
  border-bottom: none;
}
.dd-checklist li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 10px;
  font-weight: 800;
  font-size: 14px;
}
.dd-checklist.blue li::before { color: var(--blue); }
.dd-checklist.purple li::before { color: var(--purple); }
.dd-checklist.bronze li::before { color: var(--bronze); }
.dd-checklist.teal li::before { color: var(--teal); }

.dd-case-box {
  padding: 16px 20px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}
.dd-case-label {
  font-size: 11px;
  font-weight: 800;
  color: var(--bronze);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  display: block;
}

/* Deep Dive Visual Window & Enterprise Console Mockups */
.dd-visual-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(10, 20, 40, 0.08), 0 1px 3px rgba(10, 20, 40, 0.04);
  overflow: hidden;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.dd-visual-card:hover {
  box-shadow: 0 24px 60px rgba(10, 20, 40, 0.12);
}

.dd-visual-card.dark-theme {
  background: #091122;
  border-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.window-header {
  padding: 10px 18px;
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.dd-visual-card.dark-theme .window-header {
  background: rgba(0, 0, 0, 0.35);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.dd-visual-card .window-dots {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.08);
}
.dd-visual-card .window-dots::after {
  content: "SYSTEM";
  color: var(--ink-4);
}
.dd-visual-card.dark-theme .window-dots {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}
.dd-visual-card.dark-theme .window-dots::after {
  content: "AI RUNTIME";
  color: rgba(255, 255, 255, 0.8);
}

.window-title-text {
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: var(--ink-4);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.dd-visual-card.dark-theme .window-title-text {
  color: rgba(255, 255, 255, 0.7);
}

.window-body {
  padding: 24px;
}

/* ==========================================
   ENTERPRISE SCREENSHOT FRAME STYLING (REPLACING OLD MAC STYLE)
   ========================================== */
.shot-wrap {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.shot {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(10, 20, 40, 0.09), 0 1px 3px rgba(0,0,0,0.05);
  overflow: hidden;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.shot:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 70px rgba(10, 20, 40, 0.14);
}

.shot-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
}
.shot-bar i {
  display: none;
}
.shot-bar::before {
  content: "REPORT CANVAS · 业务分析报告画布";
  font-size: 11.5px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-4);
}
.shot-bar span {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-5);
  background: #edf2f7;
  padding: 2px 8px;
  border-radius: 4px;
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
  cursor: zoom-in;
  transition: transform 0.3s ease;
}
.shot:hover img {
  transform: scale(1.01);
}

.shot-copy .s-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--bronze);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.shot-copy h3 {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}
.shot-copy h3 em {
  font-style: normal;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.shot-copy p {
  font-size: 15.5px;
  color: var(--ink-4);
  line-height: 1.75;
  margin-bottom: 20px;
}

.tell-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tell-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}
.tell-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--bronze-bright);
}
.tell-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: top center;
  cursor: zoom-in;
  border-bottom: 1px solid var(--line);
  background: #f8fafc;
}
.tell-item figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink-2);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.tell-item figcaption::after {
  content: "点击放大 ↗";
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-5);
}
.tell-item:hover figcaption::after {
  color: var(--bronze);
}

/* ==========================================
   ROI CALCULATOR SECTION
   ========================================== */
.roi-calc-container {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.calc-control-group {
  margin-bottom: 24px;
}

.calc-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 14.5px;
}

.calc-value-badge {
  font-family: var(--font-mono);
  color: #2563eb;
  background: rgba(37, 99, 235, 0.10);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 13px;
}

.calc-slider-wrap {
  position: relative;
  padding-top: 4px;
}
.calc-slider {
  width: 100%;
  height: 28px;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  cursor: grab;
}
/* 轨道：已选 = 科技蓝渐变 + 微光，未选 = 冷灰 */
.calc-slider::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #93c5fd, #2563eb var(--fill, 30%), #e4e7f0 var(--fill, 30%));
  box-shadow:
    inset 0 1px 2px rgba(10, 20, 40, 0.10),
    0 0 14px rgba(37, 99, 235, 0.20);
}
/* thumb：白心渐变 + 科技蓝环 + 外圈光环 */
.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  margin-top: -8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(145deg, #ffffff 0%, #eff6ff 100%);
  border: 3px solid #2563eb;
  box-shadow:
    0 0 0 5px rgba(37, 99, 235, 0.12),
    0 3px 8px rgba(37, 99, 235, 0.42);
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.calc-slider:hover::-webkit-slider-thumb,
.calc-slider:active::-webkit-slider-thumb {
  transform: scale(1.12);
  box-shadow:
    0 0 0 7px rgba(37, 99, 235, 0.16),
    0 5px 14px rgba(37, 99, 235, 0.5);
  cursor: grabbing;
}
/* Firefox */
.calc-slider::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: #e4e7f0;
  box-shadow: inset 0 1px 2px rgba(10, 20, 40, 0.10);
}
.calc-slider::-moz-range-progress {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #93c5fd, #2563eb);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.3);
}
.calc-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(145deg, #ffffff 0%, #eff6ff 100%);
  border: 3px solid #2563eb;
  box-shadow:
    0 0 0 5px rgba(37, 99, 235, 0.12),
    0 3px 8px rgba(37, 99, 235, 0.42);
  cursor: grab;
}
/* 刻度标签（min / max） */
.calc-slider-scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-5);
  margin-top: 4px;
  padding: 0 2px;
}

.calc-results-box {
  background: #091122;
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.calc-res-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 14px;
}
.calc-res-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.calc-res-lbl {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 4px;
}

.calc-res-val {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-serif);
  color: var(--bronze-lit);
}

/* ==========================================
   CUSTOMER STORIES & INDUSTRY FILTER
   ========================================== */
.case-filter-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.case-filter-btn {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 13.5px;
  font-weight: 600;
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--ink-3);
  transition: all 0.2s ease;
}
.case-filter-btn:hover,
.case-filter-btn.active {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--bronze);
  box-shadow: var(--shadow-md);
}

.case-industry-tag {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 800;
  color: var(--bronze);
  background: var(--bronze-bg);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.case-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 12px;
}

.case-card h3 em {
  font-style: normal;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.case-card p {
  font-size: 14px;
  color: var(--ink-4);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}

.case-metrics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.case-m-v {
  font-size: 20px;
  font-weight: 800;
  color: var(--bronze);
  font-family: var(--font-serif);
  display: block;
}

.case-m-l {
  font-size: 11.5px;
  color: var(--ink-5);
}

/* ==========================================
   WHY BAISHU SECTION
   ========================================== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.why-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.why-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #0ea5e9, transparent);
}

.why-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.25);
}

.why-num {
  font-size: 40px;
  font-weight: 800;
  font-family: var(--font-serif);
  background: linear-gradient(135deg, #ffffff 0%, #bae6fd 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 12px;
}

.why-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.why-card p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.65;
}

/* ==========================================
   PROCESS ROADMAP (4 STEPS)
   ========================================== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-card.hot {
  border-color: #3b82f6;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.16);
}

.step-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  font-weight: 800;
  background: var(--grad-blue);
  color: #fff;
  padding: 2px 8px;
  border-radius: 100px;
}

.step-num-tag {
  font-size: 11px;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}

.step-price-tag {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  font-family: var(--font-serif);
}

.step-time-tag {
  font-size: 11.5px;
  color: var(--ink-5);
  margin-bottom: 14px;
}

.step-card p {
  font-size: 13.5px;
  color: var(--ink-4);
  line-height: 1.6;
}

/* ==========================================
   FAQ ACCORDION
   ========================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item.active {
  border-color: var(--blue);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.12);
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  gap: 16px;
}

.faq-chevron {
  font-size: 12px;
  color: var(--ink-5);
  transition: transform 0.25s ease;
}
.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 24px;
}

.faq-answer p {
  padding-bottom: 18px;
  font-size: 14.5px;
  color: var(--ink-4);
  line-height: 1.7;
}

/* ==========================================
   LEAD GENERATION & CONTACT SECTION
   ========================================== */
.leadgen-wrap {
  background: linear-gradient(170deg, #091326 0%, #0e1e3e 50%, #142852 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.leadgen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.leadgen-info h2 {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 16px;
}
.leadgen-info h2 em {
  font-style: normal;
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.leadgen-info p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
  margin-bottom: 28px;
}

.leadgen-perks {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.leadgen-perks li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.leadgen-perks li strong {
  color: #93c5fd;
}

/* Lead Form Card */
.lead-form-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px;
  color: var(--ink);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.form-header-badge {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.lead-form-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 20px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-slate);
  color: var(--ink);
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background: #ffffff;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.form-textarea {
  min-height: 80px;
  resize: vertical;
}

.btn-form-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 55%, #1d4ed8 100%);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 15px;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
  transition: all 0.25s ease;
  margin-top: 8px;
}
.btn-form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.5);
}

/* ==========================================
   ABOUT US SECTION
   ========================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.about-grid > * {
  min-width: 0; /* 防止内容（如按钮行）把 grid 轨道撑出视口（移动端横向溢出） */
}

.about-title {
  position: relative;
  padding-left: 18px;
}
.about-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, #fbbf24, #b45309);
}

.about-text h2 {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 20px;
}

.about-text p {
  font-size: 17px;
  color: var(--ink-4);
  line-height: 1.85;
  margin-bottom: 16px;
}
.about-text .about-lead {
  font-size: 18px;
  color: var(--ink-3);
}
.about-text p em {
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-style: italic;
  color: #b45309;
  font-weight: 600;
}
.about-text p strong {
  color: var(--ink-2);
}

/* 理念引用块 */
.about-quote {
  margin: 20px 0 0;
  padding: 16px 22px 16px 24px;
  background: linear-gradient(90deg, rgba(180, 83, 9, 0.10), rgba(180, 83, 9, 0.02));
  border-left: 3px solid #b45309;
  border-radius: 0 12px 12px 0;
  color: var(--ink-3);
  font-size: 16.5px;
  line-height: 1.9;
  position: relative;
}
.about-quote strong {
  color: #92400e;
}
.about-quote::after {
  content: "“";
  position: absolute;
  right: 16px;
  top: -6px;
  font-family: Georgia, serif;
  font-size: 52px;
  line-height: 1;
  color: rgba(180, 83, 9, 0.16);
}

/* About 按钮区 */
.about-actions {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}
.btn-bronze:hover .btn-arrow {
  transform: translateX(4px);
}
.btn-outline-bronze {
  background: transparent;
  color: #b45309;
  border: 1.5px solid #b45309;
}
.btn-outline-bronze:hover {
  background: #b45309;
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(180, 83, 9, 0.30);
  transform: translateY(-2px);
}

/* ===== 公司档案卡片 ===== */
.about-info-table {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 30px 30px;
  box-shadow: var(--shadow-sm);
  position: relative;
}
.about-info-table::before {
  content: "";
  position: absolute;
  top: 0;
  left: 30px;
  right: 30px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, #fbbf24, #b45309 60%, transparent);
}

.info-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.info-head-mark {
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: linear-gradient(180deg, #fbbf24, #b45309);
}
.info-head h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
  margin: 0;
  letter-spacing: 0.01em;
}
.info-head-badge {
  margin-left: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: #92400e;
  background: rgba(180, 83, 9, 0.10);
  border: 1px solid rgba(180, 83, 9, 0.25);
  padding: 3px 9px;
  border-radius: 999px;
}

.info-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.info-grid li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 13px 15px;
  border-radius: 10px;
  font-size: 15px;
  background: rgba(10, 20, 40, 0.025);
  border: 1px solid rgba(10, 20, 40, 0.04);
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.info-grid li:hover {
  background: rgba(180, 83, 9, 0.05);
  border-color: rgba(180, 83, 9, 0.16);
  transform: translateX(3px);
}
.info-grid li.info-highlight {
  background: linear-gradient(90deg, rgba(180, 83, 9, 0.12), rgba(180, 83, 9, 0.03));
  border-left: 3px solid #b45309;
}
.info-grid .info-k {
  flex: 0 0 86px;
  color: var(--ink-5);
  font-weight: 700;
  font-size: 14px;
  padding-top: 2px;
}
.info-grid .info-v {
  flex: 1;
  color: var(--ink-2);
  font-weight: 600;
}
.info-grid .info-highlight .info-k {
  color: #92400e;
}
.info-grid .info-link {
  color: #b45309;
  text-decoration: none;
  font-weight: 700;
  transition: color 0.2s ease;
}
.info-grid .info-link:hover {
  color: #92400e;
  text-decoration: underline;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background: #060c18;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin: 16px 0 20px;
}

/* 首页深色 footer 下，联系方式块文字改为浅色 */
.footer .footer-contact-info p,
.footer .footer-contact-info a {
  color: rgba(255, 255, 255, 0.6);
}
.footer .footer-contact-info a:hover {
  color: #e08a3c;
}
.footer .footer-contact-info .footer-contact-k {
  color: #e08a3c;
  background: rgba(224, 138, 60, 0.14);
  border-color: rgba(224, 138, 60, 0.32);
}

.footer-col h5 {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
  font-size: 13.5px;
}
.footer-col a:hover {
  color: #93c5fd;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================
   FLOATING ACTION DOCK & MODALS
   ========================================== */
.floating-dock {
  position: fixed;
  bottom: 28px;
  right: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 180;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.floating-dock.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.dock-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  font-size: 18px;
  transition: all 0.2s ease;
  position: relative;
}

.dock-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
  color: var(--blue);
}

.dock-btn.primary {
  background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 55%, #1d4ed8 100%);
  color: #ffffff;
  border: none;
}

.dock-btn .dock-tooltip {
  position: absolute;
  right: 58px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--ink);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.dock-btn:hover .dock-tooltip {
  opacity: 1;
}

/* QR Code Modal */
.qr-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.qr-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.qr-modal-backdrop {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(6, 12, 24, 0.75);
  backdrop-filter: blur(12px);
}

.qr-modal-dialog {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 440px;
  width: 90%;
  text-align: center;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
}
.qr-modal.is-open .qr-modal-dialog {
  transform: scale(1);
}

.qr-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 18px;
  color: var(--ink-5);
  cursor: pointer;
}

.qr-modal-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
}

.qr-modal-sub {
  font-size: 13px;
  color: var(--ink-4);
  margin-bottom: 16px;
}

.qr-tabs-nav {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  justify-content: center;
}

.qr-tab-btn {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--bg-subtle);
  color: var(--ink-4);
  font-weight: 600;
}
.qr-tab-btn.active {
  background: #4f46e5;
  color: #fff;
}

.qr-img-box {
  background: #ffffff;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  display: inline-block;
}

.qr-img-box img {
  width: 220px;
  height: auto;
  border-radius: 6px;
}

.qr-copy-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-slate);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.btn-copy-wechat {
  background: var(--ink);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

/* Lightbox Modal */
.site-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}
.site-lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-backdrop {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(4, 8, 16, 0.88);
  backdrop-filter: blur(14px);
}

.lightbox-dialog {
  position: relative;
  max-width: 92vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #ffffff;
  font-size: 24px;
}

.lightbox-image-wrap img {
  max-height: 80vh;
  max-width: 90vw;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.lightbox-caption {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
}

/* Toast Feedback */
.baishu-toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #091122;
  color: #ffffff;
  border: 1px solid var(--bronze-bright);
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
}
.baishu-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   百数云 · AI 元数据引擎专属高阶科技色系 (2026 Executive Azure & Slate Intelligence Theme)
   ============================================================ */

.page-meta-engine {
  /* High-end Enterprise Tech Blue & Slate Theme (Pure, high contrast, no purple/muddy yellow) */
  --bronze: #2563eb;                    /* Main Accent: Enterprise Blue (#2563eb) */
  --bronze-bright: #38bdf8;             /* Luminous Sky Cyan */
  --bronze-glow: rgba(37, 99, 235, 0.28);
  --bronze-lit: #7dd3fc;                /* Soft Sky Light */
  --bronze-bg: #eff6ff;                 /* Subtle Ice Blue Background */

  --grad-bronze: linear-gradient(135deg, #38bdf8 0%, #2563eb 55%, #1d4ed8 100%);
  --shadow-glow-bronze: 0 10px 28px rgba(37, 99, 235, 0.28);
}

.page-meta-engine .scroll-progress-bar {
  background: linear-gradient(90deg, #38bdf8, #2563eb);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
}

/* ==========================================
   METADATA ENGINE HERO SECTION
   ========================================== */
.hero-meta-page {
  position: relative;
  background: var(--grad-hero);
  color: #ffffff;
  padding: 130px 0 90px;
  min-height: 82vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.hero-meta-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-meta-inner .hero-pill {
  margin-bottom: 24px;
}

.hero-meta-inner .hero-title {
  font-size: clamp(34px, 4.8vw, 54px);
  font-weight: 900;
  line-height: 1.22;
  color: #ffffff;
  margin-bottom: 22px;
  letter-spacing: -0.02em;
  text-align: center;
}

.hero-meta-inner .hero-title em {
  font-style: normal;
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-meta-inner .hero-sub {
  font-size: clamp(16px, 1.8vw, 19.5px);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.75;
  max-width: 760px;
  margin: 0 auto 36px;
  text-align: center;
}

.hero-meta-inner .hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-meta-inner .sig {
  font-size: 14.5px;
  color: #94a3b8;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.hero-meta-inner .sig em {
  color: #7dd3fc;
  font-style: normal;
  font-weight: 700;
}

/* Page Meta Engine Section Styles */
.page-meta-engine .hero-title em,
.page-meta-engine .quote-hero em,
.page-meta-engine .section-title em {
  color: #2563eb;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-meta-engine .section.dark .section-title em,
.page-meta-engine .hero.dark .hero-title em,
.page-meta-engine .hero-meta-page .hero-title em {
  color: #38bdf8;
  background: var(--grad-title-bright);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-meta-engine .step-hot {
  border-color: #2563eb;
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.16);
  background: linear-gradient(180deg, #ffffff 0%, #f5f7ff 100%);
}

.page-meta-engine .qr-item:hover {
  border-color: rgba(37, 99, 235, 0.6);
  box-shadow: 0 20px 45px rgba(37, 99, 235, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.page-meta-engine .split-card.new {
  border-color: rgba(37, 99, 235, 0.45);
}

.page-meta-engine .paradigm-key {
  color: #7dd3fc !important;
  background: rgba(37, 99, 235, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
}

.page-meta-engine .arch-engine {
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.18);
}

.page-meta-engine .fw-item.dark {
  border-color: rgba(56, 189, 248, 0.4);
}

.page-meta-engine .fw-loop {
  border-color: rgba(56, 189, 248, 0.4);
}

.scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-hint span {
  width: 4px;
  height: 8px;
  background: var(--bronze-lit);
  border-radius: 2px;
  animation: scrollDown 2s infinite ease-in-out;
}

@keyframes scrollDown {
  0% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: 0.3; }
  100% { transform: translateY(0); opacity: 1; }
}

/* Sections */
.section {
  padding: 90px 0;
  position: relative;
}

.section.alt {
  background: var(--bg-slate);
}

.section.dark {
  background: var(--bg-dark-section);
  color: #e2e8f0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Individual Metadata Engine Page Section Backgrounds */
.page-meta-engine #problem {
  background: #ffffff;
}

.page-meta-engine #solution {
  background: linear-gradient(180deg, #edf5fe 0%, #f7fbff 100%);
  border-top: 1px solid rgba(37, 99, 235, 0.1);
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
}

.page-meta-engine .section.dark.paradigm {
  background: linear-gradient(165deg, #081122 0%, #0d1a33 70%, #091325 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-meta-engine #what {
  background: #ffffff;
}

.page-meta-engine #architecture {
  background: linear-gradient(180deg, #eef5fc 0%, #f8fbff 100%);
  border-top: 1px solid rgba(56, 189, 248, 0.15);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
}

.page-meta-engine #flywheel {
  background: #ffffff;
}

.page-meta-engine #product {
  background: linear-gradient(180deg, #f2f7fc 0%, #f9fbfd 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.page-meta-engine #product-tell {
  background: #ffffff;
}

.page-meta-engine #fits {
  background: linear-gradient(180deg, #f1f5f9 0%, #edf2f7 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.9);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.page-meta-engine #roi {
  background: linear-gradient(180deg, #edfcf4 0%, #f7fdfa 100%);
  border-top: 1px solid rgba(16, 185, 129, 0.12);
  border-bottom: 1px solid rgba(16, 185, 129, 0.1);
}

.page-meta-engine #cases {
  background: #ffffff;
}

.page-meta-engine #pricing {
  background: linear-gradient(180deg, #f3f6fa 0%, #ffffff 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
}

.page-meta-engine .section.dark.quote-section {
  background: linear-gradient(150deg, #060e1c 0%, #0b172e 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-meta-engine .section.dark.cta-section {
  background: linear-gradient(165deg, #081224 0%, #0e1e3d 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.kicker {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--bronze);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section.dark .kicker {
  color: var(--bronze-lit);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  color: var(--ink);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section.dark .section-title {
  color: #ffffff;
}

.section-title em {
  color: var(--bronze);
  font-style: normal;
}

.section.dark .section-title em {
  color: var(--bronze-lit);
}

.lead {
  font-size: 18px;
  color: var(--ink-4);
  line-height: 1.7;
  max-width: 820px;
  margin-bottom: 40px;
}

.section.dark .lead {
  color: #94a3b8;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* Painwall */
.painwall {
  margin-top: 36px;
}

.pain {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.pain:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(180, 83, 9, 0.35);
}

.pain-n {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  color: var(--bronze);
  background: var(--bronze-bg);
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 18px;
}

.pain h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 12px;
}

.pain p {
  font-size: 15px;
  color: var(--ink-4);
  line-height: 1.65;
}

/* Split Comparison */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 36px;
  overflow-x: clip; /* 裁剪 AOS 初始 transform(±100px) 的水平溢出，防移动端横向滚动 */
}

.split-card {
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  position: relative;
  transition: transform 0.25s ease;
}

.split-card.old {
  background: #ffffff;
  border: 1px solid #fed7aa;
  box-shadow: var(--shadow-sm);
}

.split-card.old .split-lbl {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 800;
  display: inline-block;
  margin-bottom: 10px;
}

.split-card.new {
  background: linear-gradient(170deg, #0d1e3d 0%, #152747 100%);
  color: #ffffff;
  border: 1px solid rgba(245, 158, 11, 0.45);
  box-shadow: 0 16px 45px rgba(10, 20, 40, 0.25);
}

.split-card.new .split-lbl {
  background: var(--bronze);
  color: #ffffff;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 800;
  display: inline-block;
  margin-bottom: 10px;
}

.split-sub {
  font-size: 14px;
  color: var(--ink-4);
  margin-bottom: 24px;
  font-weight: 600;
}

.split-card.new .split-sub {
  color: #94a3b8;
}

.split-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 15.5px;
}

.split-list li {
  position: relative;
  padding-left: 26px;
  line-height: 1.6;
}

.split-card.old .split-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: #ef4444;
  font-weight: 800;
}

.split-card.new .split-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #10b981;
  font-weight: 800;
}

/* Paradigm */
.paradigm {
  text-align: center;
}

.paradigm-body {
  max-width: 840px;
  margin: 0 auto;
  font-size: 18px;
  line-height: 1.8;
  color: #cbd5e1;
}

.paradigm-body p {
  margin-bottom: 20px;
}

.paradigm-key {
  font-size: 21px !important;
  font-weight: 800;
  color: var(--bronze-lit) !important;
  background: rgba(217, 119, 6, 0.18);
  padding: 18px 28px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 158, 11, 0.35);
  margin-top: 32px;
  display: inline-block;
}

/* Plain Hero (What we are) */
.plain-hero {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 36px;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  margin-top: 28px;
}

.plain-icon {
  background: linear-gradient(135deg, var(--bronze-bright) 0%, var(--bronze) 100%);
  color: #ffffff;
  border-radius: var(--radius-md);
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 20px;
  font-weight: 900;
  line-height: 1.35;
  box-shadow: var(--shadow-glow-bronze);
  letter-spacing: 0.05em;
}

.plain-copy .c-role {
  font-size: 13.5px;
  font-weight: 800;
  color: var(--bronze);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.plain-copy p {
  font-size: 16px;
  color: var(--ink-3);
  line-height: 1.75;
  margin-bottom: 14px;
}

.plain-key {
  background: var(--bg-slate);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  color: var(--ink) !important;
  font-size: 15.5px;
  font-weight: 700;
  margin-top: 18px;
  display: block;
}

/* Architecture Diagram */
.arch {
  display: grid;
  grid-template-columns: 1.2fr auto 1.5fr auto 1.2fr;
  gap: 16px;
  align-items: center;
  background: linear-gradient(170deg, #091326 0%, #112244 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 36px;
  color: #ffffff;
  margin-top: 32px;
  box-shadow: var(--shadow-lg);
}

.arch-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arch-lbl {
  font-size: 13px;
  font-weight: 800;
  color: #94a3b8;
  margin-bottom: 4px;
  text-align: center;
}

.arch-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
}

.arch-arrows {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  height: 100%;
  color: var(--bronze-lit);
  font-size: 18px;
}

.arch-arrows span::after {
  content: "→";
}

.arch-engine {
  background: rgba(217, 119, 6, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  box-shadow: 0 0 30px rgba(217, 119, 6, 0.15);
}

.arch-engine-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--bronze-lit);
  text-align: center;
  margin-bottom: 16px;
}

.arch-engine-title small {
  display: block;
  font-size: 10px;
  letter-spacing: 0.1em;
  opacity: 0.8;
  margin-top: 2px;
}

.arch-step {
  background: rgba(10, 20, 40, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}

.arch-arrow-main {
  color: var(--bronze-lit);
  font-size: 24px;
  font-weight: 800;
  text-align: center;
}

.arch-arrow-main span::after {
  content: "→";
}

.arch-llm-box {
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  margin-bottom: 12px;
}

.arch-llm-title {
  font-size: 16px;
  font-weight: 800;
  color: #60a5fa;
  margin-bottom: 4px;
}

.arch-llm-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.arch-mode {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
}

.arch-mode small {
  display: block;
  font-size: 10px;
  color: #94a3b8;
  font-weight: normal;
}

/* 仅供屏幕阅读器与搜索引擎的隐藏标题（视觉上不占据空间，也不显示） */
.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;
}

/* Architecture Figure — 位图版架构图（替代上面 .arch 手绘版） */
.arch-figure {
  margin: 32px auto 0;
  max-width: 1160px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.arch-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* 提示只在窄屏（图片被横向裁剪时）出现，桌面端隐藏 */
.arch-figure .arch-hint { display: none; }

.diagram-note {
  font-size: 15px;
  color: var(--ink-4);
  margin-top: 24px;
  line-height: 1.7;
  text-align: center;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.diagram-note em {
  font-style: normal;
  color: var(--bronze);
  font-weight: 700;
}

/* Flywheel */
.flywheel {
  display: grid;
  grid-template-columns: repeat(7, auto);
  gap: 12px;
  align-items: center;
  margin-top: 36px;
}

.fw-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

.fw-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(180, 83, 9, 0.3);
}

.fw-item.dark {
  background: linear-gradient(170deg, #0d1e3d 0%, #152747 100%);
  color: #ffffff;
  border-color: rgba(245, 158, 11, 0.4);
}

.fw-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  background: var(--bronze-bg);
  color: var(--bronze);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.fw-item.dark .fw-num {
  background: var(--bronze);
  color: #ffffff;
}

.fw-item h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}

.fw-item.dark h3 {
  color: #ffffff;
}

.fw-item p {
  font-size: 14px;
  color: var(--ink-4);
  line-height: 1.6;
}

.fw-item.dark p {
  color: #cbd5e1;
}

.fw-arrow {
  font-size: 22px;
  color: var(--bronze);
  font-weight: 800;
  text-align: center;
}

.fw-loop {
  grid-column: 1 / -1;
  text-align: center;
  background: var(--bronze-bg);
  color: var(--bronze);
  font-weight: 700;
  font-size: 14px;
  padding: 12px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
  border: 1px dashed rgba(217, 119, 6, 0.4);
}

/* Shot Wrap */
.shot-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
  margin-top: 36px;
}

.shot {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform 0.25s ease;
}

.shot:hover {
  transform: scale(1.01);
}

.shot-bar {
  background: var(--bg-slate);
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-4);
  font-weight: 600;
}

.shot-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  background: #cbd5e1;
}

.shot-bar i:nth-child(1) { background: #ef4444; }
.shot-bar i:nth-child(2) { background: #f59e0b; }
.shot-bar i:nth-child(3) { background: #10b981; }

.shot-bar span {
  margin-left: 8px;
}

.shot-copy .s-tag {
  font-size: 13px;
  font-weight: 800;
  color: var(--bronze);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.shot-copy h3 {
  font-size: 28px;
  font-weight: 900;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}

.shot-copy p {
  font-size: 16px;
  color: var(--ink-4);
  line-height: 1.75;
  margin-bottom: 20px;
}

.s-quote {
  border-left: 3px solid var(--bronze);
  padding-left: 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  font-style: italic;
  margin-top: 20px;
}

.s-quote-center {
  text-align: center;
  border-left: none;
  max-width: 700px;
  margin: 32px auto 0;
  padding: 16px;
  background: var(--bg-slate);
  border-radius: var(--radius-sm);
}

/* Tell Grid */
.tell-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.tell-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
}

.tell-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tell-item figcaption {
  padding: 12px 14px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  text-align: center;
  background: var(--bg-slate);
  border-top: 1px solid var(--line);
}

/* Fits */
.fits {
  margin-top: 36px;
}

.fit {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.fit:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.fit-tag {
  font-size: 12px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 16px;
}

.fit-a .fit-tag { background: var(--blue-bg); color: var(--blue); }
.fit-b .fit-tag { background: var(--bronze-bg); color: var(--bronze); font-weight: 900; }
.fit-c .fit-tag { background: var(--teal-bg); color: var(--teal); }

.fit h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.35;
}

.fit p {
  font-size: 15px;
  color: var(--ink-4);
  line-height: 1.65;
}

.fit-bottom {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-top: 36px;
}

.fit-bottom em {
  color: var(--bronze);
  font-style: normal;
}

/* ROI Cards */
.roi {
  margin-top: 36px;
}

.roi-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.roi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(180, 83, 9, 0.3);
}

.roi-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  color: var(--bronze);
  background: var(--bronze-bg);
  padding: 3px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 14px;
}

.roi-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 10px;
}

.roi-card p {
  font-size: 15px;
  color: var(--ink-4);
  line-height: 1.65;
}

/* Case Hero & Modern Story Cards */
.case-hero {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 38px 36px;
  margin-bottom: 32px;
  box-shadow: 0 10px 30px rgba(10, 20, 40, 0.05);
  transition: all 0.3s ease;
}

.case-hero:hover {
  box-shadow: 0 16px 45px rgba(10, 20, 40, 0.09);
  border-color: rgba(180, 83, 9, 0.25);
}

.case-hero-header {
  margin-bottom: 24px;
}

.case-tag {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--bronze);
  background: var(--bronze-bg);
  padding: 4px 12px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 12px;
}

.case-hero h3 {
  font-size: 23px;
  font-weight: 900;
  color: var(--ink);
  line-height: 1.35;
}

.case-hero h3 em {
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-style: normal;
}

/* Dual Column Story Grid */
.case-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.case-story-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
}

.case-story-card.before {
  background: #fbfcfe;
  border-color: #e2e8f0;
}

.case-story-card.after {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

.case-story-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.story-pill {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 3px 10px;
  border-radius: 100px;
  align-self: flex-start;
}

.pill-before {
  background: #f1f5f9;
  color: #475569;
}

.pill-after {
  background: var(--bronze-bg);
  color: var(--bronze);
}

.case-story-head h4 {
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
}

.case-story-card p {
  font-size: 14.5px;
  color: var(--ink-3);
  line-height: 1.7;
  flex: 1;
}

.case-story-card p strong {
  color: var(--ink);
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.case-m {
  text-align: center;
  background: #f8fafc;
  border: 1px solid var(--line);
  padding: 16px 14px;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.case-m:hover {
  background: #ffffff;
  border-color: var(--bronze);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.m-v {
  display: block;
  font-size: 19px;
  font-weight: 800;
  color: var(--bronze);
  font-family: var(--font-serif);
  margin-bottom: 4px;
}

.m-l {
  font-size: 12px;
  color: var(--ink-4);
  font-weight: 600;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0 20px;
}

.report-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  cursor: pointer;
}

.report-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--bronze);
}

.report-item figcaption {
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
  padding: 10px;
  background: #f8fafc;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
}

/* Steps (Pricing / Engagement) */
.steps {
  margin-top: 36px;
}

.step {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.3s ease;
}

.step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.step-hot {
  border-color: var(--bronze-bright);
  box-shadow: 0 12px 35px rgba(217, 119, 6, 0.15);
  background: linear-gradient(180deg, #ffffff 0%, #fffbeb 100%);
}

.step-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--bronze);
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 100px;
}

.step-num {
  font-size: 13px;
  font-weight: 800;
  color: var(--ink-5);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.step h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
}

.step-price {
  font-size: 32px;
  font-weight: 900;
  color: var(--bronze);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.step-unit {
  font-size: 13px;
  color: var(--ink-4);
  font-weight: 600;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.step p {
  font-size: 14.5px;
  color: var(--ink-4);
  line-height: 1.65;
}

.guarantee-strip {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 40px;
  padding: 20px;
  background: var(--bg-slate);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.gs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
}

.gc {
  color: #10b981;
  font-weight: 900;
}

/* Quote Section */
.quote-section {
  text-align: center;
  padding: 100px 0;
  background: var(--grad-hero);
}

.quote-hero {
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.6;
  max-width: 860px;
  margin: 0 auto 24px;
}

.quote-hero em {
  font-style: normal;
  color: var(--bronze-lit);
  background: linear-gradient(135deg, #fde68a 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.quote-source {
  font-size: 14px;
  color: #94a3b8;
  letter-spacing: 0.1em;
}

/* CTA Section & Contact Form */
.cta-section {
  background: var(--ink-bg);
  color: #ffffff;
  padding: 90px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: flex-start;
}

.cta-title {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 900;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 20px;
}

.cta-title em {
  font-style: normal;
  color: var(--bronze-lit);
}

.cta-lead {
  font-size: 16.5px;
  color: #cbd5e1;
  line-height: 1.75;
  margin-bottom: 28px;
}

.cta-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 15px;
  color: #e2e8f0;
}

.cta-points li span {
  color: #10b981;
  font-weight: 900;
  margin-right: 8px;
}

.contact-form {
  background: #ffffff;
  color: var(--ink-3);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
}

.form-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
}

.form-sub {
  font-size: 13px;
  color: var(--ink-4);
  margin-bottom: 20px;
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.form-field .req {
  color: #ef4444;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  background: #ffffff;
  color: var(--ink);
  transition: all 0.2s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--bronze);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

.form-note {
  font-size: 12px;
  color: var(--ink-5);
  margin-top: 12px;
  text-align: center;
}

.form-error {
  color: #ef4444;
  font-size: 13px;
  margin-top: 8px;
}

.form-success {
  color: #059669;
  font-size: 13px;
  margin-top: 8px;
}

/* QR Block - Centered & Highly Legible */
.qr-block {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
}

.qr-header {
  max-width: 620px;
  margin: 0 auto 36px;
}

.qr-title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.qr-sub {
  font-size: 14.5px;
  color: #94a3b8;
  line-height: 1.6;
}

.qr-row {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 28px;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 0 auto;
}

.qr-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  width: 240px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.qr-item:hover {
  transform: translateY(-6px);
  border-color: rgba(245, 158, 11, 0.5);
  box-shadow: 0 20px 45px rgba(217, 119, 6, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.qr-img-wrap {
  width: 204px;
  height: 204px;
  background: #ffffff;
  border-radius: 12px;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

.qr-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 6px;
  display: block;
}

.qr-footer-hint {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
  font-size: 13.5px;
  color: #cbd5e1;
}

.qr-footer-hint span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Site Footer */
.site-footer {
  background: #070e1d;
  color: #94a3b8;
  padding: 60px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  color: #64748b;
}

/* Footer 联系方式块（电话 / 邮箱 / 地址） */
.footer-contact-info {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-contact-info p {
  font-size: 13px;
  line-height: 1.6;
  color: #94a3b8;
  margin: 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.footer-contact-info .footer-contact-k {
  flex: 0 0 auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #b45309;
  background: rgba(180, 83, 9, 0.12);
  border: 1px solid rgba(180, 83, 9, 0.28);
  border-radius: 3px;
  padding: 1px 6px;
  margin-top: 1px;
}
.footer-contact-info a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-contact-info a:hover {
  color: #b45309;
}

.footer-nav-title {
  font-size: 14px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  font-size: 14px;
  color: #94a3b8;
}

.footer-nav a:hover {
  color: var(--bronze-lit);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  font-size: 13px;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================
   RESPONSIVE DESIGN SYSTEM
   ========================================== */
@media (max-width: 1100px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .deep-dive-grid { grid-template-columns: 1fr; gap: 40px; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .roi-calc-container { grid-template-columns: 1fr; gap: 32px; }
  .leadgen-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-top { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: span 3; }
}

@media (max-width: 800px) {
  .top-banner { font-size: 12px; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: #0a1428;
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 24px 32px;
    gap: 20px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 210;
  }
  .nav-links.mobile-active {
    transform: translateX(0);
  }
  /* Raise specificity so these win over the desktop rules
     .nav.scrolled .nav-links > li > a { color: var(--ink-3) } — otherwise the
     drawer text turns dark blue-black on the dark backdrop after scrolling. */
  .nav-links > li > a,
  .nav.scrolled .nav-links > li > a {
    color: #ffffff;
    font-size: 16px;
  }
  /* Mobile drawer: keep active/hover readable on the dark backdrop,
     even when .nav.scrolled flips the desktop active color to deep blue (#2563eb). */
  .nav-links > li > a:hover,
  .nav-links > li > a.active,
  .nav.scrolled .nav-links > li > a:hover,
  .nav.scrolled .nav-links > li > a.active {
    color: #93c5fd;
  }
  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 1001;
  }
  /* Backdrop overlay (created on demand by main.js).
     - z-index 199 keeps the dim layer *below* .nav (200) so the dropdown
       submenu stays sharp when the drawer opens. Just a clean dim overlay;
       no backdrop-filter blur (per user request — keep the drawer crystal
       clear, only dim the page beneath). */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 20, 40, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s, visibility 0.35s;
    z-index: 199;
  }
  .nav-overlay.show {
    opacity: 1;
    visibility: visible;
  }
  .dropdown {
    position: static;
    width: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    box-shadow: none;
    padding: 10px;
    margin-top: 8px;
    display: none;
  }
  .dropdown::before {
    display: none;
  }
  .nav-links > li.has-dropdown:hover .dropdown,
  .nav-links > li.has-dropdown.is-open .dropdown {
    display: block;
  }
  /* ─── Mobile-adapted dropdown (simplified) ─── */
  .dropdown .dd-head {
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }
  .dropdown .dd-head-title {
    font-size: 13px;
    line-height: 1.4;
  }
  .dropdown .dd-item {
    padding: 10px 10px;
    gap: 10px;
    border-radius: 8px;
  }
  /* Mobile drawer has a dark backdrop — kill the desktop highlight here. */
  .dropdown .dd-item-featured {
    background-color: transparent;
  }
  .dropdown .dd-icon {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }
  .dropdown .dd-name {
    font-size: 14px;
    gap: 6px;
  }
  .dropdown .dd-tag {
    font-size: 11.5px;
    line-height: 1.45;
    color: #94a3b8;
  }
  .dropdown .dd-name {
    color: #ffffff;
  }
  .dropdown .dd-tag {
    color: #94a3b8;
  }
  .dropdown .dd-head-title {
    color: #ffffff;
  }
  .hero {
    padding: 50px 0 70px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .portfolio-grid,
  .cases-grid,
  .why-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }
  .leadgen-wrap {
    padding: 36px 24px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 540px) {
  /* 移动端：行业标题独占一行，chips 从下一行起排 */
  .trust-inner {
    gap: 14px;
  }
  .trust-title {
    flex-basis: 100%;
  }
  .hero-cta-row {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta-row .btn {
    width: 100%;
  }
  .form-row-2 {
    grid-template-columns: 1fr;
  }
  .leadgen-perks {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-brand {
    grid-column: span 1;
  }
  .floating-dock {
    bottom: 20px;
    right: 20px;
  }
}