/* ===== 易途智能 · 品牌样式 v4.0 ===== */
/* UI 设计专家精调 — 精致 · 可信 · 有温度 */

:root {
  /* ── 品牌色板（紫蓝渐变，更具科技感） ── */
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-deeper: #3730a3;
  --primary-light: #818cf8;
  --primary-lighter: #a5b4fc;
  --primary-bg: #eef2ff;
  --primary-bg2: #dbeafe;

  --secondary: #059669;
  --secondary-light: #34d399;
  --secondary-bg: #ecfdf5;

  --accent: #d97706;
  --accent-light: #fbbf24;
  --accent-bg: #fffbeb;

  --purple: #7c3aed;
  --purple-light: #a78bfa;
  --purple-bg: #f5f3ff;

  /* ── 中性色（更柔软） ── */
  --text: #0f172a;
  --text2: #475569;
  --text3: #94a3b8;
  --text4: #cbd5e1;
  --bg: #fafbfc;
  --bg2: #f1f5f9;
  --bg-warm: #fefcf5;
  --card: #ffffff;
  --card-hover: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  /* ── 语义色 ── */
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --info: #4f46e5;
  --info-bg: #eef2ff;

  /* ── 圆角 ── */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* ── 阴影 ── */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(79,70,229,0.08);
  --shadow-lg: 0 8px 32px rgba(79,70,229,0.1);
  --shadow-xl: 0 16px 48px rgba(79,70,229,0.12);

  /* ── 布局 ── */
  --max-w: 1120px;
  --max-w-narrow: 800px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --nav-h: 60px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 暗色模式 ===== */
[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --primary-deeper: #4f46e5;
  --primary-light: #a5b4fc;
  --primary-lighter: #c7d2fe;
  --primary-bg: rgba(79,70,229,0.12);
  --primary-bg2: rgba(79,70,229,0.18);

  --secondary: #34d399;
  --secondary-light: #6ee7b7;
  --secondary-bg: rgba(5,150,105,0.12);

  --accent: #fbbf24;
  --accent-light: #fcd34d;
  --accent-bg: rgba(217,119,6,0.12);

  --purple: #a78bfa;
  --purple-light: #c4b5fd;
  --purple-bg: rgba(124,58,237,0.12);

  --text: #f1f5f9;
  --text2: #94a3b8;
  --text3: #64748b;
  --text4: #475569;
  --bg: #0b1120;
  --bg2: #0f172a;
  --bg-warm: #0f172a;
  --card: #1e293b;
  --card-hover: #1e293b;
  --border: #334155;
  --border-light: #1e293b;

  --success: #34d399;
  --success-bg: rgba(5,150,105,0.12);
  --warning: #fbbf24;
  --warning-bg: rgba(217,119,6,0.12);
  --error: #f87171;
  --error-bg: rgba(220,38,38,0.12);
  --info: #818cf8;
  --info-bg: rgba(79,70,229,0.12);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.45);
}

[data-theme="dark"] .hero::before {
  background-image: 
    linear-gradient(rgba(129,140,248,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(129,140,248,0.06) 1px, transparent 1px);
}
[data-theme="dark"] .section-alt {
  background: linear-gradient(180deg, var(--bg) 0%, #0f172a 50%, var(--bg) 100%);
}
[data-theme="dark"] .nav {
  background: rgba(11,17,32,0.8);
  border-bottom: 1px solid rgba(51,65,85,0.5);
}
[data-theme="dark"] .cta-section {
  box-shadow: 0 8px 32px rgba(79,70,229,0.3);
}
[data-theme="dark"] .roi-table th:nth-child(2),
[data-theme="dark"] .roi-table td:nth-child(2) {
  background: rgba(220,38,38,0.1);
}
[data-theme="dark"] .roi-table th:nth-child(3),
[data-theme="dark"] .roi-table td:nth-child(3) {
  background: rgba(5,150,105,0.1);
}
[data-theme="dark"] .roi-save {
  background: linear-gradient(135deg, rgba(5,150,105,0.12), rgba(5,150,105,0.08));
}
[data-theme="dark"] .btn-ghost {
  border-color: var(--border);
  color: var(--text2);
}
[data-theme="dark"] .btn-ghost:hover {
  background: var(--card-hover);
  border-color: var(--text3);
}
[data-theme="dark"] .hero-api-note {
  background: rgba(129,140,248,0.08);
}
[data-theme="dark"] ::selection {
  background: rgba(129,140,248,0.25);
  color: #fff;
}
[data-theme="dark"] .hero-dot-1 { opacity: 0.3; }
[data-theme="dark"] .hero-dot-2 { opacity: 0.25; }
[data-theme="dark"] .hero-dot-3 { opacity: 0.2; }

/* ===== 暗色模式：网络状态栏 ===== */
[data-theme="dark"] #network-bar.net-internal {
  background: rgba(5,150,105,0.12) !important;
  border-bottom-color: rgba(5,150,105,0.3) !important;
}
[data-theme="dark"] #network-bar.net-tunnel {
  background: rgba(217,119,6,0.12) !important;
  border-bottom-color: rgba(217,119,6,0.3) !important;
}

/* ===== 暗色模式：服务页产品卡片 ===== */
[data-theme="dark"] .plan-card .plan-hd {
  background: linear-gradient(135deg, rgba(79,70,229,0.08), var(--card)) !important;
}
[data-theme="dark"] .plan-card[style*="secondary-bg"],
[data-theme="dark"] .plan-card[style*="purple"] {
  border-color: rgba(79,70,229,0.2) !important;
}

/* ===== 暗色模式：标签徽章（inline style 覆盖） ===== */
[data-theme="dark"] .pc-badge.recommend {
  background: rgba(217,119,6,0.2) !important;
  color: var(--accent) !important;
}
[data-theme="dark"] .spc-badge[style*="#eef2ff"],
[data-theme="dark"] .sub-product-card .spc-badge:first-child {
  background: rgba(79,70,229,0.2) !important;
  color: var(--primary) !important;
}
[data-theme="dark"] .spc-badge[style*="#f5f3ff"],
[data-theme="dark"] .sub-product-card .spc-badge:last-child {
  background: rgba(124,58,237,0.2) !important;
  color: var(--purple) !important;
}

/* ===== 暗色模式：关于页高亮块 ===== */
[data-theme="dark"] .about-content .highlight {
  background: rgba(79,70,229,0.08);
  border-color: rgba(79,70,229,0.15);
}
[data-theme="dark"] .about-content div[style*="background:var(--primary-bg)"] {
  background: rgba(79,70,229,0.08) !important;
}

/* ===== 暗色模式：U盘双版卡片 ===== */
[data-theme="dark"] .sub-product-card[style*="border-color:var(--purple-light)"] {
  border-color: rgba(124,58,237,0.3) !important;
}

/* ===== 暗色模式：登录页 ===== */
[data-theme="dark"] .login-page {
  background: var(--bg) !important;
}
[data-theme="dark"] .login-card {
  background: var(--card) !important;
  border-color: var(--border) !important;
}
[data-theme="dark"] .login-card input {
  background: var(--bg2) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}

/* ===== 暗色模式：内部页面/管理 ===== */
[data-theme="dark"] .admin-page,
[data-theme="dark"] .guide-page {
  background: var(--bg) !important;
}
[data-theme="dark"] .admin-card,
[data-theme="dark"] .guide-card {
  background: var(--card) !important;
  border-color: var(--border) !important;
}

/* ===== 网络状态栏基础样式 ===== */
#network-bar { transition: all .3s; }
#network-bar.net-internal {
  background: #f0fdf4;
  border-bottom-color: #86efac;
}
#network-bar.net-tunnel {
  background: #fff7ed;
  border-bottom-color: #fdba74;
}
.net-dot-green { color: #16a34a; }
.net-dot-orange { color: #ea580c; }
.net-label { color: #16a34a; font-weight: 600; }
#network-bar.net-tunnel .net-label { color: #ea580c; }
.net-link { color: inherit; opacity: .5; font-size: 10px; text-decoration: none; }
.net-link-green { color: #16a34a; font-size: 10px; text-decoration: none; font-weight: 500; }

/* ===== 暗色模式：网络状态栏覆盖 ===== */
[data-theme="dark"] #network-bar.net-internal {
  background: rgba(5,150,105,0.12) !important;
  border-bottom-color: rgba(5,150,105,0.3) !important;
}
[data-theme="dark"] #network-bar.net-tunnel {
  background: rgba(217,119,6,0.12) !important;
  border-bottom-color: rgba(217,119,6,0.3) !important;
}
[data-theme="dark"] .net-label { color: var(--success) !important; }
[data-theme="dark"] #network-bar.net-tunnel .net-label { color: var(--accent) !important; }
[data-theme="dark"] .net-dot-green { color: var(--success) !important; }
[data-theme="dark"] .net-dot-orange { color: var(--accent) !important; }
[data-theme="dark"] .net-link-green { color: var(--success) !important; }

/* ===== 主题切换按钮 ===== */
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: all var(--transition);
  flex-shrink: 0;
  margin-left: 8px;
}
.theme-toggle:hover {
  border-color: var(--primary);
  background: var(--primary-bg);
  color: var(--primary);
  transform: rotate(8deg);
}
[data-theme="dark"] .theme-toggle:hover {
  transform: rotate(180deg);
}

/* ===== 基础重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { 
  scroll-behavior: smooth; 
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }

::selection { background: var(--primary-bg2); color: var(--primary-deeper); }

/* ===== 排版 ===== */
h1, h2, h3, h4, h5 { line-height: 1.25; font-weight: 700; letter-spacing: -0.02em; }

/* ===== 导航（全新毛玻璃设计） ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid rgba(226,232,240,0.5);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 24px;
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
  letter-spacing: -0.3px;
}
.nav-brand:hover { opacity: 1; color: var(--text); }
.nav-brand .logo {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  border-radius: 8px;
  display: flex;
  align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 700;
  box-shadow: 0 2px 8px rgba(79,70,229,0.25);
  transition: transform var(--transition);
}
.nav-brand:hover .logo { transform: scale(1.05) rotate(-2deg); }
.nav-brand .brand-sub {
  font-size: 10px;
  font-weight: 500;
  color: var(--text3);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-links a {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}
.nav-links a:hover { background: var(--card-hover); color: var(--text); }
.nav-links a.active { 
  color: var(--primary); 
  background: var(--primary-bg); 
  font-weight: 600; 
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2.5px;
  background: var(--primary);
  border-radius: 2px;
}

@media (max-width: 600px) {
  .nav { padding: 0 14px; }
  .nav-brand { font-size: 14px; gap: 8px; }
  .nav-brand .logo { width: 26px; height: 26px; font-size: 12px; border-radius: 6px; }
  .nav-links { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { padding: 5px 10px; font-size: 13px; }
}

/* ===== 容器 ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .container { padding: 0 16px; } }
.section { padding: 72px 0; }
@media (max-width: 600px) { .section { padding: 48px 0; } }
.section-center { text-align: center; }
.section-alt {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 50%, var(--bg) 100%);
}

/* ===== 区块标题 ===== */
.section-title {
  margin-bottom: 44px;
  text-align: center;
}
@media (max-width: 600px) { .section-title { margin-bottom: 32px; } }
.section-title .tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--primary-bg);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 14px;
  border: 1px solid var(--primary-bg2);
}
.section-title h2 {
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 800;
  margin-bottom: 10px;
  line-height: 1.25;
  letter-spacing: -0.03em;
}
.section-title p {
  color: var(--text2);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 按钮系统（更精致） ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--purple));
  color: #fff;
  box-shadow: 0 2px 8px rgba(79,70,229,0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(79,70,229,0.35);
  transform: translateY(-2px);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary-bg);
  transform: translateY(-1px);
  color: var(--primary);
}
.btn-ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--card-hover);
  color: var(--text);
  border-color: var(--text3);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #b45309);
  color: #fff;
  box-shadow: 0 2px 8px rgba(217,119,6,0.2);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217,119,6,0.3);
  color: #fff;
}
.btn-success {
  background: linear-gradient(135deg, var(--secondary), #047857);
  color: #fff;
  box-shadow: 0 2px 8px rgba(5,150,105,0.2);
}
.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(5,150,105,0.3);
  color: #fff;
}
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-lg { padding: 14px 34px; font-size: 15px; border-radius: var(--radius); }
.btn-block { width: 100%; }

/* ===== Hero 区（全新视觉系统） ===== */
.hero {
  padding: 80px 0 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
/* 背景网格装饰 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(79,70,229,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,70,229,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 70%);
  pointer-events: none;
}
/* 主光晕 */
.hero::after {
  content: '';
  position: absolute;
  top: -30%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(79,70,229,0.06) 0%, rgba(124,58,237,0.04) 40%, transparent 65%);
  pointer-events: none;
}
/* 浮动装饰圆 */
.hero-dot {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.5;
}
.hero-dot-1 {
  top: 15%; left: 8%;
  width: 40px; height: 40px;
  background: var(--primary-lighter);
  animation: floatSlow 8s ease-in-out infinite;
}
.hero-dot-2 {
  bottom: 25%; right: 12%;
  width: 28px; height: 28px;
  background: var(--purple-light);
  animation: floatSlow 6s ease-in-out infinite 2s;
}
.hero-dot-3 {
  top: 40%; right: 8%;
  width: 16px; height: 16px;
  background: var(--secondary-light);
  animation: floatSlow 7s ease-in-out infinite 1s;
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@media (max-width: 768px) {
  .hero { min-height: auto; padding: 56px 0 40px; }
  .hero-dot { display: none; }
}

.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(79,70,229,0.08);
  color: var(--primary);
  padding: 5px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(79,70,229,0.12);
  backdrop-filter: blur(4px);
}
.hero h1 {
  font-size: clamp(30px, 5.5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  max-width: 720px;
  margin: 0 auto 18px;
  letter-spacing: -0.03em;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--purple) 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .sub {
  font-size: 16px;
  color: var(--text2);
  max-width: 580px;
  margin: 0 auto 24px;
  line-height: 1.8;
}
@media (max-width: 600px) { .hero .sub { font-size: 15px; } }

.hero-api-note {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 28px;
  padding: 6px 16px;
  background: rgba(79,70,229,0.04);
  border-radius: var(--radius-full);
  display: inline-block;
}

.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.hero .stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero .stat-item { text-align: center; }
.hero .stat-item .num { 
  font-size: 30px; 
  font-weight: 800; 
  background: linear-gradient(135deg, var(--primary), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .stat-item .label { font-size: 13px; color: var(--text3); margin-top: 4px; }

/* ===== 产品卡片（全新设计） ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .product-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; } }

.product-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--primary-lighter);
}
/* 主推产品高亮边框 */
.product-card.featured {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 1px var(--primary-light), var(--shadow-md);
  transform: scale(1.02);
  z-index: 1;
}
.product-card.featured:hover {
  box-shadow: 0 0 0 1px var(--primary), var(--shadow-xl);
  transform: scale(1.02) translateY(-4px);
}
.product-card.featured .card-bg {
  position: absolute; top: 0; left: 0; right: 0;
  height: 160px;
  background: linear-gradient(180deg, rgba(79,70,229,0.04), transparent);
  pointer-events: none;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
@media (max-width: 900px) { .product-card.featured { transform: none; } }
@media (max-width: 900px) { .product-card.featured:hover { transform: translateY(-4px); } }

.product-card .pc-head {
  padding: 28px 24px 16px;
  text-align: center;
  position: relative;
}
.product-card .pc-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin: 0 auto 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform var(--transition);
}
.product-card:hover .pc-icon { transform: scale(1.08); }
.product-card .pc-icon.blue { background: linear-gradient(135deg, #eef2ff, #dbeafe); }
.product-card .pc-icon.green { background: linear-gradient(135deg, #ecfdf5, #d1fae5); }
.product-card .pc-icon.amber { background: linear-gradient(135deg, #fffbeb, #fef3c7); }
.product-card .pc-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.product-card .pc-badge.hot { background: #fef2f2; color: #dc2626; }
.product-card .pc-badge.new { background: var(--primary-bg); color: var(--primary); }
.product-card .pc-badge.recommend { 
  background: linear-gradient(135deg, var(--accent-bg), #fef3c7); 
  color: var(--accent); 
}
.product-card .pc-name { font-size: 19px; font-weight: 700; margin-bottom: 4px; }
.product-card .pc-sub { font-size: 13px; color: var(--text2); line-height: 1.5; }

.product-card .pc-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0 24px;
}

.product-card .pc-body { padding: 16px 24px 20px; flex: 1; }
.product-card .pc-features { list-style: none; padding: 0; margin: 0; }
.product-card .pc-features li {
  padding: 6px 0;
  font-size: 13px;
  color: var(--text2);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}
.product-card .pc-features li .chk { 
  color: var(--secondary); 
  font-weight: 700; 
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--success-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  margin-top: 2px;
}

.product-card .pc-price-area {
  background: linear-gradient(135deg, var(--bg), var(--bg2));
  margin: 0 24px;
  padding: 16px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border-light);
}
.product-card .pc-price-area .price-label { font-size: 11px; color: var(--text3); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.product-card .pc-price-area .price-num { 
  font-size: 28px; 
  font-weight: 800; 
  background: linear-gradient(135deg, var(--text), var(--primary-deeper));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.product-card .pc-price-area .price-num small { font-size: 14px; font-weight: 400; -webkit-text-fill-color: var(--text2); }
.product-card .pc-price-area .price-desc { font-size: 12px; color: var(--text2); margin-top: 4px; }

.product-card .pc-foot {
  padding: 16px 24px 24px;
  text-align: center;
}

/* ===== U盘双版（左右对比更清晰） ===== */
.sub-product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}
@media (max-width: 600px) { .sub-product-grid { grid-template-columns: 1fr; } }
.sub-product-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all var(--transition);
  position: relative;
}
.sub-product-card:hover { 
  border-color: var(--primary-lighter); 
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.sub-product-card .spc-badge {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.sub-product-card .spc-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.sub-product-card .spc-desc { font-size: 12px; color: var(--text2); line-height: 1.6; }
.sub-product-card .spc-price { 
  font-size: 20px; 
  font-weight: 700; 
  color: var(--primary); 
  margin-top: 8px;
}

/* ===== 核心价值网格 ===== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .value-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .value-grid { grid-template-columns: 1fr; } }
.value-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition-slow);
  text-align: left;
  position: relative;
  overflow: hidden;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--purple));
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.value-card:hover::before { opacity: 1; }
.value-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary-lighter);
}
.value-card .icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.value-card .icon.blue { background: linear-gradient(135deg, #eef2ff, #dbeafe); }
.value-card .icon.teal { background: linear-gradient(135deg, #ecfdf5, #d1fae5); }
.value-card .icon.amber { background: linear-gradient(135deg, #fffbeb, #fef3c7); }
.value-card .icon.purple { background: linear-gradient(135deg, #f5f3ff, #ede9fe); }
.value-card .icon.green { background: linear-gradient(135deg, #ecfdf5, #d1fae5); }
.value-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 13px; color: var(--text2); line-height: 1.7; }
.value-card .api-note {
  font-size: 12px;
  color: var(--text3);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}

/* ===== 交付步骤 ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; gap: 14px; } }
.step-card {
  text-align: center;
  padding: 32px 20px 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--transition);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.step-card .step-num {
  width: 44px; height: 44px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px;
  box-shadow: 0 2px 8px rgba(79,70,229,0.25);
}
.step-card h4 { font-size: 16px; margin-bottom: 8px; font-weight: 600; }
.step-card p { font-size: 13px; color: var(--text2); line-height: 1.7; }

/* ===== CTA 区块（全新渐变设计） ===== */
.cta-section {
  text-align: center;
  padding: 64px 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deeper), var(--purple));
  color: #fff;
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(79,70,229,0.2);
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(255,255,255,0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 40%);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  top: -40%; left: -20%;
  width: 140%; height: 160%;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section h2 { 
  font-size: 28px; 
  font-weight: 700; 
  margin-bottom: 12px; 
  position: relative; 
  letter-spacing: -0.02em;
}
.cta-section p { 
  font-size: 15px; 
  opacity: .85; 
  margin-bottom: 28px; 
  position: relative; 
  max-width: 480px; 
  margin-left: auto; 
  margin-right: auto; 
}
.cta-section .btn { 
  background: #fff; 
  color: var(--primary); 
  font-weight: 700; 
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.cta-section .btn:hover { 
  background: #f1f5f9; 
  transform: translateY(-2px); 
  box-shadow: 0 6px 20px rgba(0,0,0,0.2); 
  color: var(--primary-deeper);
}

/* ===== 信任要素条 ===== */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text2);
  line-height: 1.4;
  transition: all var(--transition);
  flex: 1 1 auto;
  min-width: 160px;
  justify-content: center;
}
.trust-item:hover { 
  border-color: var(--primary-lighter); 
  box-shadow: var(--shadow-sm); 
  transform: translateY(-2px);
}
.trust-item .ti-icon { font-size: 18px; flex-shrink: 0; }
.trust-item strong { color: var(--text); }

/* ===== 时间线 ===== */
.timeline { max-width: 620px; margin: 0 auto; }
.timeline-item {
  position: relative;
  padding-left: 36px;
  padding-bottom: 32px;
  transition: all var(--transition);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item:hover { padding-left: 40px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-light), var(--purple-light), var(--secondary-light));
}
.timeline-item:last-child::before { display: none; }
.timeline-item::after {
  content: '';
  position: absolute;
  left: 1px;
  top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 6px rgba(79,70,229,0.2);
  transition: transform var(--transition);
}
.timeline-item:hover::after { transform: scale(1.3); }
.timeline-item:nth-child(2)::after { background: var(--secondary); }
.timeline-item:nth-child(3)::after { background: #10b981; }
.timeline-item:nth-child(4)::after { background: var(--accent); }
.timeline-item:nth-child(5)::after { background: var(--purple); }
.timeline-item .time {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 2px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}
.timeline-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.timeline-item .desc { font-size: 13px; color: var(--text2); line-height: 1.7; }

/* ===== 对比表 ===== */
.compare-table-wrap { overflow-x: auto; margin-top: 24px; }
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
  min-width: 520px;
}
.compare-table th {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  font-size: 13px;
  color: var(--text2);
  background: var(--bg);
  white-space: nowrap;
}
.compare-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.compare-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.compare-table th:not(:first-child) { text-align: center; }
.compare-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.compare-table td:not(:first-child) { text-align: center; }
.compare-table .check { color: var(--success); font-weight: 700; }
.compare-table .dash { color: var(--text3); }
.compare-table tr:hover td { background: var(--card-hover); }
.compare-table tr:last-child td:first-child { border-radius: 0 0 0 var(--radius-sm); }
.compare-table tr:last-child td:last-child { border-radius: 0 0 var(--radius-sm) 0; }

/* ===== ROI 算账表 ===== */
.roi-wrap {
  max-width: 640px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.roi-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.roi-table th {
  padding: 16px 18px;
  font-weight: 700;
  font-size: 14px;
  text-align: center;
  border-bottom: 2px solid var(--border);
}
.roi-table th:first-child { text-align: left; background: var(--bg); }
.roi-table th:nth-child(2) { background: #fef2f2; color: var(--error); }
.roi-table th:nth-child(3) { background: var(--success-bg); color: var(--success); }
.roi-table td {
  padding: 12px 18px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.roi-table td:first-child { text-align: left; color: var(--text2); font-size: 12px; }
.roi-table td:nth-child(2) { background: rgba(254,242,242,0.4); color: var(--error); }
.roi-table td:nth-child(3) { background: rgba(240,253,244,0.4); color: var(--success); font-weight: 600; }
.roi-table tr:last-child td { border-bottom: none; padding: 16px 18px; }
.roi-table tr:last-child td:nth-child(3) { font-size: 20px; font-weight: 800; }
.roi-save {
  text-align: center;
  padding: 18px;
  background: linear-gradient(135deg, var(--success-bg), #d1fae5);
  font-size: 15px;
  font-weight: 700;
  color: var(--success);
  border-top: 2px solid #bbf7d0;
}
.roi-save small { font-weight: 400; font-size: 12px; color: var(--text2); }

/* ===== 关于页 ===== */
.about-content { max-width: 720px; margin: 0 auto; }
.about-content p { font-size: 15px; color: var(--text2); line-height: 1.8; margin-bottom: 16px; }
.about-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 36px 0 12px;
  color: var(--text);
}
.about-content .highlight {
  background: var(--primary-bg);
  border: 1px solid var(--primary-bg2);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 24px 0;
}
.about-content .highlight h4 { color: var(--primary); font-size: 14px; margin-bottom: 8px; }
.about-content .highlight ul {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text2);
  padding-left: 20px;
  line-height: 2.2;
}

/* ===== 服务页产品卡片 ===== */
.plan-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.3s ease;
}
.plan-card:hover { box-shadow: var(--shadow-lg); border-color: var(--primary-lighter); transform: translateY(-3px); }
.plan-card .plan-hd { padding: 28px 24px; }
.plan-card .plan-hd .emoji { font-size: 34px; margin-bottom: 8px; }
.plan-card .plan-hd h3 { font-size: 19px; font-weight: 700; margin-bottom: 4px; }
.plan-card .plan-hd .sub { font-size: 12px; color: var(--text2); }
.plan-card .plan-hd .price { font-size: 13px; color: var(--text); margin-top: 10px; }
.plan-card .plan-hd .price-sub { font-size: 12px; color: var(--primary); margin-top: 2px; font-weight: 700; }
.plan-card .plan-bd { padding: 16px 24px; }
.plan-card .plan-bd .feat {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  border-bottom: 1px dashed var(--border);
}
.plan-card .plan-bd .feat:last-child { border-bottom: none; }
.plan-card .plan-bd .feat .check { color: var(--success); font-weight: 700; font-size: 14px; }
.plan-card .plan-bd .feat .no { color: var(--text3); }
.plan-card .plan-ft { padding: 14px 24px; border-top: 1px solid var(--border); text-align: center; }

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px 40px;
  text-align: center;
  color: var(--text3);
  font-size: 13px;
  background: linear-gradient(180deg, transparent, rgba(79,70,229,0.02));
}
.footer .brand { 
  font-weight: 700; 
  color: var(--text); 
  font-size: 15px; 
  letter-spacing: 0.3px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer .brand-sub { font-size: 12px; color: var(--text3); margin-top: 4px; }
.footer .links { margin-top: 16px; display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.footer .links a { color: var(--text2); font-size: 13px; }
.footer .links a:hover { color: var(--primary); }
.footer .links .sep { color: var(--text4); font-size: 10px; }
@media (max-width: 480px) { .footer { padding: 32px 16px; font-size: 12px; } }

/* ===== 滚动入场动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== 小易聊天窗口 ===== */
.chat-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}
.chat-panel {
  width: 360px;
  max-height: 520px;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
  border: 1px solid var(--border);
  display: none;
  flex-direction: column;
  margin-bottom: 12px;
  overflow: hidden;
  animation: chatIn .25s ease;
}
.chat-panel.open { display: flex; }
@keyframes chatIn {
  from { opacity: 0; transform: translateY(12px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  color: #fff;
  flex-shrink: 0;
}
.chat-header-info { display: flex; align-items: center; gap: 10px; }
.chat-avatar { font-size: 22px; }
.chat-name { font-size: 14px; font-weight: 700; }
.chat-status { font-size: 10px; opacity: .8; margin-top: 1px; }
.chat-close {
  background: rgba(255,255,255,.15);
  border: none; color: #fff; font-size: 14px;
  width: 28px; height: 28px; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background .12s;
}
.chat-close:hover { background: rgba(255,255,255,.3); }
.chat-msgs {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 200px;
  max-height: 340px;
  background: var(--bg);
}
.chat-msgs::-webkit-scrollbar { width: 4px; }
.chat-msgs::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 4px; }
.chat-msg { display: flex; gap: 8px; max-width: 85%; }
.chat-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg-avatar { font-size: 18px; flex-shrink: 0; }
.msg-content { min-width: 0; }
.msg-bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.6;
  word-break: break-word;
}
.chat-msg.bot .msg-bubble {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.chat-msg.user .msg-bubble {
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.msg-bubble.streaming { opacity: .7; }
.typing {
  display: inline-block;
  animation: pulse 1.2s ease-in-out infinite;
  color: var(--text3);
  font-size: 12px;
}
@keyframes pulse {
  0%, 100% { opacity: .4; }
  50% { opacity: 1; }
}
.chat-input-area {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  background: var(--card);
  flex-shrink: 0;
}
.chat-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: inherit;
  resize: none;
  outline: none;
  line-height: 1.5;
  min-height: 36px;
  max-height: 120px;
  transition: border-color .15s;
}
.chat-input:focus { border-color: var(--primary); }
.chat-send {
  width: 36px; height: 36px;
  background: var(--primary);
  border: none; border-radius: 50%;
  color: #fff; font-size: 14px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .12s;
  flex-shrink: 0;
}
.chat-send:hover { opacity: .9; }
.chat-send:disabled { opacity: .4; cursor: default; }
.chat-btn {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  border: none; border-radius: 50%;
  color: #fff; font-size: 22px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(79,70,229,.3);
  transition: all .2s;
  display: flex; align-items: center; justify-content: center;
}
.chat-btn:hover { transform: scale(1.06); box-shadow: 0 6px 20px rgba(79,70,229,.35); }
.chat-btn.hidden { display: none; }
.chat-btn-icon { line-height: 1; }
@media (max-width: 480px) {
  .chat-panel { width: calc(100vw - 32px); max-height: 70vh; position: fixed; bottom: 88px; right: 16px; }
  .chat-msgs { max-height: 50vh; }
  .chat-btn { width: 48px; height: 48px; font-size: 18px; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mt-10 { margin-top: 40px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { display: flex; gap: 8px; flex-wrap: wrap; }
.gap-3 { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }