/* ====================================================================
 * Design Contract — 样点 YangDian Marketing Landing
 * ==================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Brand colors */
  --primary:        #0D9488;           /* teal-600 主色 */
  --primary-dark:   #0F766E;           /* teal-700 深色 hover */
  --primary-deep:   #042F2E;           /* teal-900 极深文字 */
  --primary-light:  #5EEAD4;           /* teal-300 浅渐变 */
  --accent:         #F59E0B;           /* amber-500 点睛色 */
  --accent-soft:    #FEF3C7;           /* amber-100 浅背景 */
  --gradient-primary: linear-gradient(135deg, #0D9488 0%, #06B6D4 100%);
  --gradient-radial: radial-gradient(ellipse at center, rgba(13,148,136,0.12) 0%, transparent 70%);

  /* Neutrals */
  --bg:            #F8FAFB;            /* 页面背景 */
  --surface:       #FFFFFF;            /* 卡片表面 */
  --surface-alt:   #F1F5F9;            /* 交替板块背景 slate-100 */
  --text-dark:     #0F172A;            /* slate-900 标题 */
  --text-body:     #475569;            /* slate-600 正文 */
  --text-muted:    #94A3B8;            /* slate-400 辅助文字 */
  --border:        #E2E8F0;            /* slate-200 边框 */
  --border-strong: #CBD5E1;            /* slate-300 */

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* Shadow — 克制分层，不是每张卡同重阴影 */
  --shadow-sm:  0 1px 2px rgba(15,23,42,0.04), 0 1px 3px rgba(15,23,42,0.06);
  --shadow-md:  0 4px 14px rgba(15,23,42,0.07), 0 2px 4px rgba(15,23,42,0.05);
  --shadow-lg:  0 20px 40px rgba(13,148,136,0.10), 0 8px 20px rgba(15,23,42,0.06);
  --shadow-xl:  0 24px 48px rgba(13,148,136,0.22);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 0.15s;
  --t-base: 0.25s;
  --t-slow: 0.4s;

  /* Layout */
  --container-max: 1200px;
  --nav-h: 68px;
}

/* ====================================================================
 * Reset & Base
 * ==================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body {
  font-family: "Inter", "HarmonyOS Sans SC", "MiSans", "Alibaba PuHuiTi 3.0", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  color: var(--text-body);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
svg { display: block; }

/* ====================================================================
 * Container
 * ==================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ====================================================================
 * Navbar — 固定顶部 + 模糊玻璃效果
 * ==================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
  transition: box-shadow var(--t-base) var(--ease);
}
.navbar.is-scrolled { box-shadow: 0 1px 3px rgba(15,23,42,0.06); }

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}
.brand-logo {
  height: 34px;
  width: auto;
  display: block;
}

/* Nav menu — 桌面端 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-menu a {
  font-size: 15px;
  color: var(--text-body);
  font-weight: 500;
  padding: 6px 0;
  position: relative;
  transition: color var(--t-fast) var(--ease);
}
.nav-menu a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: right var(--t-base) var(--ease);
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a:hover::after { right: 0; }
/* 当前栏目选中态：锁定高亮，鼠标移开后仍然保留 */
.nav-menu a.is-active { color: var(--primary); font-weight: 600; }
.nav-menu a.is-active::after { right: 0; }

/* Nav auth buttons — 桌面端 */
.nav-auth { display: flex; gap: 8px; align-items: center; }

/* Hamburger — 移动端 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  transition: background var(--t-fast) var(--ease);
}
.hamburger:hover { background: var(--surface-alt); }
.hamburger span {
  display: block;
  height: 2.5px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--t-base) var(--ease);
}
.hamburger span:nth-child(1),
.hamburger span:nth-child(3) { width: 22px; }
.hamburger span:nth-child(2)  { width: 28px; }
.hamburger span:nth-child(3)  { margin-left: auto; }
.hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); width: 28px; }
.hamburger.is-active span:nth-child(2) { opacity: 0; }
.hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); width: 28px; margin-left: 0; }

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 20px 24px;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform var(--t-slow) var(--ease), opacity var(--t-slow) var(--ease);
  z-index: 999;
  box-shadow: var(--shadow-md);
}
.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
}
.mobile-menu a {
  display: block;
  padding: 16px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border);
}
.mobile-menu a.is-active { color: var(--primary); font-weight: 600; }
.mobile-menu .mobile-auth {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

/* ====================================================================
 * Buttons
 * ==================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-base) var(--ease),
              background var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              color var(--t-base) var(--ease);
  user-select: none;
}
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(13,148,136,0.30);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(13,148,136,0.40);
}

.btn-outline {
  background: var(--surface);
  color: var(--text-dark);
  border: 1.5px solid var(--border-strong);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(13,148,136,0.04);
}

.btn-ghost {
  background: transparent;
  color: var(--text-body);
  padding: 12px 16px;
}
.btn-ghost:hover { color: var(--primary); }

/* --- 登录后顶部导航：进入问卷管理后台（醒目渐变 + pulse）--- */
.btn-admin-entry {
  padding: 9px 20px;
  background: linear-gradient(135deg, #0D9488 0%, #6366f1 60%, #8b5cf6 100%);
  color: #fff !important;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.3px;
  cursor: pointer;
  position: relative;
  box-shadow: 0 4px 14px rgba(13,148,136,.35), 0 0 0 0 rgba(139,92,246,.4);
  animation: adminPulse 2.4s ease-in-out infinite;
  transition: transform .18s, box-shadow .18s;
}
.btn-admin-entry:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99,102,241,.45), 0 0 0 6px rgba(139,92,246,.12);
  animation-play-state: paused;
}
.btn-admin-entry:active { transform: translateY(0); }
@keyframes adminPulse {
  0%, 100% { box-shadow: 0 4px 14px rgba(13,148,136,.35), 0 0 0 0 rgba(139,92,246,.4); }
  50%      { box-shadow: 0 4px 14px rgba(99,102,241,.4), 0 0 0 8px rgba(139,92,246,0); }
}

.btn-lg { padding: 15px 30px; font-size: 16px; border-radius: var(--radius-lg); }

/* ====================================================================
 * Hero
 * ==================================================================== */
.hero {
  position: relative;
  padding: 140px 0 96px;
  overflow: hidden;
  background:
    var(--gradient-radial),
    linear-gradient(180deg, rgba(13,148,136,0.04) 0%, rgba(248,250,251,1) 100%),
    var(--bg);
}
/* 背景装饰气泡 */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}
.hero::before {
  width: 420px; height: 420px;
  top: -120px; right: -120px;
  background: rgba(6,182,212,0.18);
}
.hero::after {
  width: 300px; height: 300px;
  bottom: -80px; left: -60px;
  background: rgba(245,158,11,0.12);
}

.hero .container {
  position: relative;
  z-index: 2;
}

/* ---------- Hero 两列布局 ---------- */
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}
.hero-left { min-width: 0; text-align: left; }
.hero-right { min-width: 0; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(13,148,136,0.08);
  border: 1px solid rgba(13,148,136,0.15);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 28px;
  letter-spacing: 0.3px;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Hero 价格标签（醒目突出） */
.hero-price-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #FEF3C7, #FDE68A);
  border: 1.5px solid #F59E0B;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  color: #92400E;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.22);
  animation: pricePulse 2.5s ease-in-out infinite;
}
.hero-price-tag .price-tag-emoji { font-size: 16px; }
.hero-price-tag .price-tag-num {
  font-size: 22px;
  font-weight: 800;
  color: #B45309;
  padding: 0 2px;
}
.hero-price-tag .price-tag-sub {
  font-size: 12px;
  font-weight: 500;
  color: #A16207;
  opacity: 0.85;
}
@keyframes pricePulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(245, 158, 11, 0.22); }
  50% { box-shadow: 0 6px 24px rgba(245, 158, 11, 0.38); }
}

.hero h1 {
  font-size: 54px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-dark);
  margin-bottom: 20px;
  letter-spacing: -1.5px;
}
.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h1 .accent-text {
  position: relative;
  color: var(--accent);
}

.hero-slogan {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.hero-desc {
  font-size: 15.5px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.stat-item { text-align: left; }
.stat-num {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ---------- 右侧能力全景卡片 ---------- */
.hero-cap-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 36px 32px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.hero-cap-card::before {
  /* 顶部渐变条 */
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

/* 右上角"全部过关"徽章 */
.cap-badge {
  position: absolute;
  top: 20px; right: 20px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  background: linear-gradient(135deg, #10B981, #059669);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 10px rgba(16,185,129,0.35);
  letter-spacing: 0.5px;
}

.cap-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}
.cap-title {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.3px;
}
.cap-sub {
  font-size: 13px;
  color: var(--text-muted);
}

/* Tag 墙 */
.tag-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}
.cap-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 15px;
  background: #F0FDFA;
  border: 1px solid #99F6E4;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-dark);
  transition: all var(--t-base) var(--ease);
}
.cap-tag svg { flex-shrink: 0; }
.cap-tag:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(13,148,136,0.3);
}

/* 卡片底部小结条 */
.cap-foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-body);
  font-weight: 500;
}
.cap-foot .check-circle {
  color: #10B981;
  flex-shrink: 0;
}

/* ====================================================================
 * Section common
 * ==================================================================== */
section { padding: 96px 0; }

.section-title {
  text-align: center;
  margin-bottom: 64px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 6px 14px;
  background: rgba(13,148,136,0.06);
  border-radius: var(--radius-pill);
}
.section-title h2 {
  font-size: 40px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.8px;
  margin-bottom: 14px;
  line-height: 1.25;
}
.section-title p {
  font-size: 17px;
  color: var(--text-muted);
}

/* ====================================================================
 * Pain points (痛点)
 * ==================================================================== */
.pain-points { background: var(--surface-alt); }

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pain-card {
  background: var(--surface);
  padding: 36px 28px;
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--border);
  transition: transform var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease);
  position: relative;
  overflow: hidden;
}
.pain-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #EF4444, #F59E0B);
  opacity: 0;
  transition: opacity var(--t-base) var(--ease);
}
.pain-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(239,68,68,0.2);
}
.pain-card:hover::before { opacity: 1; }

.pain-icon {
  width: 56px; height: 56px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #DC2626;
  transition: transform var(--t-base) var(--ease-bounce);
}
.pain-card:hover .pain-icon { transform: scale(1.08); }

.pain-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.pain-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ====================================================================
 * Services (平台服务)
 * ==================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  position: relative;
  padding: 48px 44px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease);
}
.service-card:hover { transform: translateY(-4px); }

.service-card.primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.service-card.primary::after {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 240px; height: 240px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  pointer-events: none;
}

.service-card.light {
  background: var(--surface-alt);
  color: var(--text-dark);
  border: 1px solid var(--border);
}

.service-card.dark {
  background: linear-gradient(145deg, #0F172A 0%, #1E293B 100%);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
}
.service-card.dark::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -60px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.35) 0%, transparent 70%);
  pointer-events: none;
}
.service-card.dark:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 56px rgba(15, 23, 42, 0.28);
  border-color: rgba(139, 92, 246, 0.4);
}

.service-icon {
  width: 62px; height: 62px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}
.service-card.primary .service-icon {
  background: rgba(255,255,255,0.18);
  backdrop-filter: blur(6px);
}
.service-card.light .service-icon {
  background: rgba(13,148,136,0.10);
  color: var(--primary);
}
.service-card.dark .service-icon {
  background: rgba(139, 92, 246, 0.20);
  color: #C4B5FD;
  backdrop-filter: blur(6px);
}

.service-card h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
  position: relative;
  z-index: 2;
}
.service-card p {
  font-size: 15px;
  line-height: 1.75;
  opacity: 0.92;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  z-index: 2;
}
.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.55;
}
.service-list li svg {
  flex-shrink: 0;
  margin-top: 2px;
}
.service-card.primary .service-list li { opacity: 0.95; }
.service-card.light .service-list li { color: var(--text-body); }
.service-card.dark .service-list li { color: rgba(255,255,255,0.88); }
.service-card.dark .service-list li svg { color: #C4B5FD; }

/* ====================================================================
 * Process (业务流程)
 * ==================================================================== */
.process { background: var(--surface-alt); }

.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
  gap: 0;
}
/* 连接线 */
.process-timeline::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 12.5%;
  right: 12.5%;
  height: 3px;
  background: linear-gradient(90deg,
              var(--primary-light) 0%,
              var(--primary) 33%,
              var(--gradient-primary) 66%,
              var(--accent) 100%);
  border-radius: 3px;
}

.process-step {
  position: relative;
  text-align: center;
  padding: 0 8px;
}

.step-icon {
  width: 96px; height: 96px;
  margin: 0 auto 24px;
  background: var(--surface);
  border: 3px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  position: relative;
  z-index: 2;
  transition: all var(--t-base) var(--ease);
}
.step-icon::after {
  /* 步骤编号 */
  content: attr(data-step);
  position: absolute;
  bottom: -4px;
  right: -4px;
  width: 28px; height: 28px;
  background: var(--surface);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  color: var(--primary);
}
.process-step:hover .step-icon {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 12px 28px rgba(13,148,136,0.35);
}
.process-step:hover .step-icon::after {
  background: var(--accent);
  border-color: #fff;
  color: #fff;
}

.process-step h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ====================================================================
 * Advantages (核心优势)
 * ==================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.advantage-card {
  display: flex;
  gap: 22px;
  padding: 36px 32px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  transition: transform var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease);
  position: relative;
}
.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(13,148,136,0.25);
}

.advantage-icon {
  flex-shrink: 0;
  width: 52px; height: 52px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 6px 14px rgba(13,148,136,0.3);
}
.advantage-card:hover .advantage-icon {
  transform: scale(1.08);
  transition: transform var(--t-base) var(--ease-bounce);
}

.advantage-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.advantage-card p {
  font-size: 14.5px;
  color: var(--text-body);
  line-height: 1.7;
}

/* ====================================================================
 * CTA
 * ==================================================================== */
.cta-section { padding-bottom: 100px; }
.cta-box {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -150px; right: -100px;
  width: 400px; height: 400px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.cta-box::after {
  content: '';
  position: absolute;
  bottom: -100px; left: -80px;
  width: 300px; height: 300px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}
.cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.cta-box p {
  font-size: 16px;
  opacity: 0.92;
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}
.cta-box .btn-primary {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  position: relative;
  z-index: 2;
}
.cta-box .btn-primary:hover {
  background: #F8FAFB;
  box-shadow: 0 12px 28px rgba(0,0,0,0.20);
}
.cta-box .btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
  position: relative;
  z-index: 2;
}
.cta-box .btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
}

/* ====================================================================
 * Footer
 * ==================================================================== */
.footer {
  background: var(--primary-deep);
  color: #94A3B8;
  padding: 64px 0 28px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .brand-logo {
  height: 44px;
  width: auto;
  padding: 6px 10px;
  background: #fff;
  border-radius: 10px;
  box-sizing: border-box;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.75;
  max-width: 340px;
  margin-bottom: 22px;
}
.footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: #94A3B8;
  transition: color var(--t-fast) var(--ease);
}
.footer a:hover { color: #fff; }

.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 40px; height: 40px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: #CBD5E1;
  transition: all var(--t-base) var(--ease);
}
.social-links a:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: 28px;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

.footer-bottom #icp-slot {
  white-space: nowrap;
}

.footer-bottom a {
  display: inline;
  padding: 0;
  font-size: inherit;
  color: inherit;
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ====================================================================
 * Fade-up animation (staggered page-load reveal)
 * ==================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease),
              transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ====================================================================
 * Responsive
 * ==================================================================== */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; max-width: 680px; }
  .hero h1 { font-size: 44px; letter-spacing: -1px; }
  .hero-left { text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .stat-item { text-align: center; }
  .section-title h2 { font-size: 34px; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
  .process-timeline::before { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .nav-menu, .nav-auth { display: none; }
  .hamburger { display: flex; }
  section { padding: 72px 0; }
  .hero { padding: 110px 0 72px; }
  .hero-grid { gap: 36px; }
  .hero h1 { font-size: 34px; letter-spacing: -0.5px; }
  .hero-slogan { font-size: 17px; }
  .hero-desc { font-size: 15px; margin-bottom: 28px; }
  .hero-actions { justify-content: center; flex-direction: column; padding: 0 8px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 28px; margin-top: 40px; padding-top: 24px; }
  .stat-num { font-size: 26px; }
  /* 右侧卡片 mobile */
  .hero-cap-card { padding: 28px 22px 24px; }
  .cap-badge { font-size: 11px; padding: 5px 10px; top: 16px; right: 16px; }
  .cap-title { font-size: 17px; }
  .cap-tag { font-size: 12px; padding: 7px 12px; }
  .section-title { margin-bottom: 48px; }
  .section-title h2 { font-size: 28px; }
  .pain-grid { grid-template-columns: 1fr; gap: 16px; }
  .services-grid { gap: 16px; }
  .service-card { padding: 36px 28px; }
  .service-card h3 { font-size: 20px; }
  .process-timeline { gap: 32px 0; }
  .step-icon { width: 80px; height: 80px; }
  .advantages-grid { gap: 16px; }
  .advantage-card { padding: 28px 24px; gap: 16px; }
  .advantage-icon { width: 48px; height: 48px; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 26px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
}

/* Small phone (≤480px) */
@media (max-width: 480px) {
  .hero h1 { font-size: 30px; }
  .section-title h2 { font-size: 26px; }
  .services-grid { grid-template-columns: 1fr; }
  .process-timeline { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 24px; }
  section { padding: 60px 0; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}