/* ==========================================================================
   AirLumen 浮光 —— 浅蓝磨砂玻璃风格
   设计 Token 参考 TDesign：色彩 / 圆角 / 字体 / 阴影规范
   ========================================================================== */

:root {
  /* 品牌与功能色（TDesign 蓝系） */
  --td-brand-1: #f2f8ff;
  --td-brand-2: #d9ecff;
  --td-brand-3: #b4daff;
  --td-brand-4: #7ab8ff;
  --td-brand-5: #4a94ff;
  --td-brand-6: #2a7cf6;
  --td-brand-7: #0052d9;
  --td-brand-8: #003cab;
  --td-brand-9: #002a7a;
  --td-brand-10: #001c52;

  --td-error: #d54941;
  --td-text-1: rgba(12, 32, 58, 0.92);
  --td-text-2: rgba(12, 32, 58, 0.68);
  --td-text-3: rgba(12, 32, 58, 0.46);

  --td-bg-1: #f4f9ff;
  --td-bg-2: #e8f2ff;

  /* 语义色 */
  --accent: var(--td-brand-6);
  --accent-soft: var(--td-brand-2);
  --text-1: var(--td-text-1);
  --text-2: var(--td-text-2);
  --text-3: var(--td-text-3);

  /* 圆角（TDesign radius 规范） */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 999px;

  /* 玻璃层 */
  --glass-bg: linear-gradient(150deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.4));
  --glass-brd: rgba(255, 255, 255, 0.72);
  --glass-blur: 20px;
  --glass-shadow: 0 12px 40px -12px rgba(16, 76, 148, 0.22);
  --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.85);

  /* 字体（TDesign 字族规范） */
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.45s;

  --maxw: 1120px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100svh;
  font-family: var(--font);
  color: var(--text-1);
  background:
    radial-gradient(1200px 700px at 12% -8%, #ffffff 0%, rgba(255, 255, 255, 0) 60%),
    radial-gradient(1000px 800px at 100% 0%, #dcecff 0%, rgba(220, 236, 255, 0) 55%),
    linear-gradient(180deg, var(--td-bg-1) 0%, var(--td-bg-2) 100%);
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--td-brand-8); }

/* ---------- 背景光斑 ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.75;
  will-change: transform;
  transition: transform 0.9s var(--ease);
}
.orb--a {
  width: 46vw; height: 46vw;
  left: -8vw; top: -10vw;
  background: radial-gradient(circle, #a9d4ff, rgba(169, 212, 255, 0) 70%);
  animation: float-a 18s ease-in-out infinite;
}
.orb--b {
  width: 38vw; height: 38vw;
  right: -6vw; top: 22vh;
  background: radial-gradient(circle, #c9e6ff, rgba(201, 230, 255, 0) 70%);
  animation: float-b 22s ease-in-out infinite;
}
.orb--c {
  width: 30vw; height: 30vw;
  left: 28vw; bottom: -8vw;
  background: radial-gradient(circle, #d9edff, rgba(217, 237, 255, 0) 70%);
  animation: float-c 26s ease-in-out infinite;
}

@keyframes float-a {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(6vw, 5vh, 0) scale(1.12); }
}
@keyframes float-b {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1.05); }
  50% { transform: translate3d(-7vw, -6vh, 0) scale(0.95); }
}
@keyframes float-c {
  0%, 100% { transform: translate3d(0, 0, 0) scale(0.95); }
  50% { transform: translate3d(5vw, -8vh, 0) scale(1.1); }
}

.grid-veil {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 82, 217, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 82, 217, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

/* ---------- 玻璃通用类 ---------- */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1px solid var(--glass-brd);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow), var(--glass-inset);
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 14px;
  z-index: 20;
  max-width: var(--maxw);
  margin: 14px auto 0;
  padding: 10px 14px 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-radius: var(--r-full);
  animation: drop-in 0.7s var(--ease) both;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text-1); }
.brand__mark {
  border-radius: 10px;
  box-shadow: 0 4px 14px -4px rgba(0, 82, 217, 0.5);
  transition: transform 0.6s var(--ease);
}
.brand:hover .brand__mark { transform: rotate(-12deg) scale(1.08); }
.brand__text { display: flex; align-items: baseline; gap: 8px; }
.brand__text strong { font-size: 17px; letter-spacing: 0.2px; }
.brand__text small { color: var(--text-3); font-size: 12px; }

.topbar__nav { display: flex; align-items: center; gap: 6px; }
.topbar__nav a:not(.btn) {
  color: var(--text-2);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--r-full);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.topbar__nav a:not(.btn):hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.6);
}

/* ---------- 按钮（TDesign 按钮规范） ---------- */
.btn {
  --btn-h: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--btn-h);
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--r-full);
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), color 0.3s var(--ease);
}
.btn--sm { --btn-h: 34px; padding: 0 16px; font-size: 14px; }
.btn:active { transform: translateY(1px) scale(0.985); }

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--td-brand-5), var(--td-brand-7));
  box-shadow: 0 10px 24px -10px rgba(0, 82, 217, 0.75);
}
.btn--primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 30px -12px rgba(0, 82, 217, 0.85);
}

.btn--ghost {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.55);
  border-color: rgba(255, 255, 255, 0.8);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.btn--ghost:hover {
  color: var(--td-brand-8);
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

/* ---------- 布局 ---------- */
main {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 40px;
}

.section { padding: 76px 0 0; }
.section__head { margin-bottom: 28px; }
.section__head h2 {
  margin: 0 0 6px;
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: -0.4px;
}
.section__head p { margin: 0; color: var(--text-2); font-size: 15px; }

/* ---------- Hero ---------- */
.hero { padding: 92px 0 8px; text-align: center; }

.hero__eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 16px;
  font-size: 12.5px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--td-brand-7);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--r-full);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  animation: rise 0.8s var(--ease) both;
}

.hero__title {
  margin: 0;
  font-size: clamp(46px, 10vw, 96px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -2px;
  background: linear-gradient(120deg, var(--td-brand-8) 0%, var(--td-brand-5) 45%, #6fc7ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: rise 0.9s 0.05s var(--ease) both;
}
.hero__title-thin {
  display: block;
  font-size: clamp(15px, 2.4vw, 22px);
  font-weight: 400;
  letter-spacing: 8px;
  text-indent: 8px;
  opacity: 0.72;
  -webkit-text-fill-color: var(--td-brand-6);
  transform: translateY(-6px);
}

.hero__desc {
  max-width: 620px;
  margin: 20px auto 0;
  color: var(--text-2);
  font-size: clamp(15px, 1.9vw, 17.5px);
  animation: rise 0.9s 0.12s var(--ease) both;
}
.hero__desc strong { color: var(--text-1); font-weight: 600; }

.hero__actions {
  margin-top: 32px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  animation: rise 0.9s 0.2s var(--ease) both;
}

.hero__meta {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  animation: rise 0.9s 0.28s var(--ease) both;
}
.stat { padding: 18px 12px; border-radius: var(--r-md); }
.stat b {
  display: block;
  font-size: clamp(22px, 3.2vw, 30px);
  color: var(--td-brand-7);
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 13px; color: var(--text-3); }

/* ---------- 功能网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}
.grid__empty { grid-column: 1 / -1; padding: 34px; text-align: center; color: var(--text-3); }

.card {
  position: relative;
  padding: 24px;
  border-radius: var(--r-lg);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  transform-style: preserve-3d;
}
.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 0%),
    rgba(255, 255, 255, 0.55), transparent 65%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 48px -18px rgba(16, 76, 148, 0.38); }
.card:hover::after { opacity: 1; }

.card__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--td-brand-7);
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.9), rgba(213, 233, 255, 0.9));
  box-shadow: 0 6px 16px -6px rgba(0, 82, 217, 0.5);
  margin-bottom: 14px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; font-size: 14.5px; color: var(--text-2); }

.card__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  font-size: 11.5px;
  color: var(--td-brand-7);
  background: rgba(0, 82, 217, 0.08);
  border-radius: var(--r-full);
}
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
}
.card__link svg { width: 15px; height: 15px; transition: transform 0.3s var(--ease); }
.card:hover .card__link svg { transform: translateX(4px); }

/* ---------- 服务卡（数据驱动渲染） ---------- */
.grid--services {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px;
}

.card--service { padding: 26px; }

.card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}
.card--service .card__icon { margin-bottom: 0; }
.card__badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.card--service .card__tag { margin-bottom: 0; }

.card__status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  color: #177d55;
  background: rgba(23, 125, 85, 0.09);
  border-radius: var(--r-full);
  padding: 3px 9px;
}
.card__status i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22a06b;
  box-shadow: 0 0 0 3px rgba(34, 160, 107, 0.16);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.82); }
}

.card__desc { min-height: 3.2em; }

.card__points {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}
.card__points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}
.card__points li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--td-brand-4), var(--td-brand-7));
  box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
}
.card__points b { color: var(--text-1); font-weight: 600; }
.card__points code {
  padding: 1px 6px;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--td-brand-7);
  background: rgba(0, 82, 217, 0.07);
  border-radius: var(--r-sm);
  word-break: break-all;
}

.card__stats {
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px dashed rgba(0, 82, 217, 0.16);
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.chip {
  font-size: 12px;
  color: var(--td-brand-7);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(0, 82, 217, 0.14);
  border-radius: var(--r-full);
  padding: 4px 11px;
  white-space: nowrap;
}

.section__more {
  margin: 22px 0 0;
  font-size: 13.5px;
  color: var(--text-3);
  text-align: center;
}

/* ---------- FAQ ---------- */
.faq { padding: 8px 22px; border-radius: var(--r-lg); }
.faq details { border-bottom: 1px solid rgba(255, 255, 255, 0.6); }
.faq details:last-child { border-bottom: 0; }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 26px 18px 0;
  font-weight: 500;
  position: relative;
  transition: color 0.3s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '';
  position: absolute;
  right: 4px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--td-brand-6);
  border-bottom: 2px solid var(--td-brand-6);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.35s var(--ease);
}
.faq details[open] summary { color: var(--accent); }
.faq details[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq p { margin: 0 0 18px; color: var(--text-2); font-size: 14.5px; }

/* ---------- CTA / Footer ---------- */
.cta {
  margin-top: 76px;
  padding: 48px 28px;
  text-align: center;
  border-radius: var(--r-xl);
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.8), rgba(198, 224, 255, 0.6));
}
.cta h2 { margin: 0 0 8px; font-size: clamp(22px, 3.2vw, 30px); }
.cta p { margin: 0; color: var(--text-2); }
.cta__actions { margin-top: 24px; }

.footer {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  padding: 34px 20px 40px;
  font-size: 13.5px;
  color: var(--text-3);
}
.footer a { color: var(--text-2); }
.footer a:hover { color: var(--accent); }
.footer__dot { opacity: 0.5; }

/* ---------- 入场动画 ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes drop-in {
  from { opacity: 0; transform: translateY(-14px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .topbar { margin: 10px 12px 0; padding: 8px 10px 8px 12px; }
  .topbar__nav a:not(.btn) { display: none; }
  .hero { padding: 60px 0 0; }
  .hero__meta { grid-template-columns: 1fr; }
  .section { padding-top: 56px; }
  .cta { margin-top: 56px; padding: 36px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}