/* ============================================================
   九九互动（海南）科技有限公司 · 官方网站
   Design System · 纯手写 CSS，无任何外部依赖
   ============================================================ */

:root {
  /* 品牌色 */
  --brand-950: #050d1f;
  --brand-900: #08152b;
  --brand-800: #0c2044;
  --brand-700: #103066;
  --brand-600: #1450b8;
  --brand-500: #1c6be0;
  --brand-400: #3d8bff;
  --brand-100: #e3eeff;
  --brand-50:  #f2f7ff;

  --accent-600: #00a88f;
  --accent-500: #00c9a7;
  --accent-400: #22e0c0;

  /* 中性色 */
  --ink-900: #0b1526;
  --ink-800: #152238;
  --ink-700: #1e293b;
  --ink-500: #475569;
  --ink-400: #64748b;
  --ink-300: #94a3b8;
  --ink-200: #cbd5e1;

  --line: #e3e9f2;
  --line-soft: #eef2f8;
  --bg: #ffffff;
  --bg-soft: #f5f8fc;

  /* 圆角 */
  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 30px;
  --r-full: 999px;

  /* 阴影 */
  --sh-xs: 0 1px 2px rgba(11, 21, 38, .06);
  --sh-sm: 0 2px 10px rgba(11, 21, 38, .05), 0 1px 2px rgba(11, 21, 38, .04);
  --sh-md: 0 14px 34px -16px rgba(11, 21, 38, .18), 0 2px 8px rgba(11, 21, 38, .04);
  --sh-lg: 0 34px 70px -30px rgba(8, 21, 43, .35), 0 4px 14px rgba(8, 21, 43, .06);
  --sh-brand: 0 16px 34px -14px rgba(28, 107, 224, .55);

  /* 布局 */
  --container: 1200px;
  --gutter: 24px;
  --header-h: 76px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

@media (max-width: 767px) {
  :root { --gutter: 18px; --header-h: 64px; }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans CJK SC", system-ui,
               -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; transition: color .18s var(--ease); }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }

::selection { background: var(--brand-500); color: #fff; }

:focus-visible {
  outline: 2px solid var(--brand-400);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: clamp(64px, 8vw, 112px) 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--brand-950); color: rgba(255, 255, 255, .74); }
.section--dark h2, .section--dark h3 { color: #fff; }

.section--tight { padding-top: clamp(48px, 6vw, 76px); }

/* ---------- Section heading ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand-500);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-400));
}
.section--dark .eyebrow { color: var(--accent-400); }

.section-head { max-width: 760px; margin-bottom: clamp(36px, 4.5vw, 60px); }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head--center .eyebrow::before { display: none; }
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  margin-bottom: 16px;
}
.section-head p {
  font-size: clamp(15px, 1.3vw, 17px);
  color: var(--ink-500);
}
.section--dark .section-head p { color: rgba(255, 255, 255, .66); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1023px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .18s var(--ease), box-shadow .22s var(--ease),
              background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease);
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn:active { transform: translateY(1px) scale(.99); }

.btn--primary {
  background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
  color: #fff;
  box-shadow: var(--sh-brand);
}
.btn--primary:hover { box-shadow: 0 20px 40px -14px rgba(28, 107, 224, .7); transform: translateY(-2px); }

.btn--ghost {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .26);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .16); border-color: rgba(255, 255, 255, .45); transform: translateY(-2px); }

.btn--outline {
  background: #fff;
  color: var(--ink-800);
  border: 1px solid var(--line);
  box-shadow: var(--sh-xs);
}
.btn--outline:hover { border-color: var(--brand-400); color: var(--brand-600); transform: translateY(-2px); }

.btn--sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background-color .3s var(--ease), box-shadow .3s var(--ease),
              backdrop-filter .3s var(--ease);
}
.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 13, 31, .55), transparent);
  opacity: 1;
  transition: opacity .3s var(--ease);
  pointer-events: none;
}
.site-header.is-stuck {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(16px);
  box-shadow: 0 1px 0 rgba(11, 21, 38, .07), 0 10px 30px -22px rgba(11, 21, 38, .4);
}
.site-header.is-stuck::after { opacity: 0; }

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  display: grid;
  place-items: center;
  box-shadow: 0 10px 22px -12px rgba(28, 107, 224, .9);
}
.brand-mark svg { width: 24px; height: 24px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #fff;
  transition: color .3s var(--ease);
}
.brand-text em {
  font-style: normal;
  font-size: 10px;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .55);
  transition: color .3s var(--ease);
}
.site-header.is-stuck .brand-text strong { color: var(--ink-900); }
.site-header.is-stuck .brand-text em { color: var(--ink-400); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav > a:not(.btn) {
  position: relative;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, .78);
  border-radius: var(--r-xs);
}
.nav > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-400);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s var(--ease);
}
.nav > a:not(.btn):hover { color: #fff; }
.nav > a:not(.btn):hover::after,
.nav > a.is-active::after { transform: scaleX(1); }
.nav > a.is-active { color: #fff; font-weight: 600; }

.site-header.is-stuck .nav > a:not(.btn) { color: var(--ink-600, var(--ink-500)); }
.site-header.is-stuck .nav > a:not(.btn):hover { color: var(--brand-600); }
.site-header.is-stuck .nav > a.is-active { color: var(--brand-600); }

.nav .btn { margin-left: 10px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--r-xs);
  place-items: center;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .22);
}
.site-header.is-stuck .nav-toggle { color: var(--ink-800); border-color: var(--line); }
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 1023px) {
  .nav-toggle { display: grid; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 18px var(--gutter) 26px;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--sh-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav > a:not(.btn) { color: var(--ink-700) !important; padding: 13px 8px; border-radius: var(--r-xs); }
  .nav > a:not(.btn):hover { background: var(--brand-50); }
  .nav > a:not(.btn)::after { display: none; }
  .nav .btn { margin: 12px 0 0; height: 46px; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(52px, 8vw, 104px)) 0 clamp(64px, 8vw, 108px);
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(28, 107, 224, .55), transparent 60%),
    radial-gradient(760px 520px at 6% 104%, rgba(0, 201, 167, .26), transparent 62%),
    linear-gradient(160deg, #061026 0%, #0a1c3a 46%, #071530 100%);
  color: rgba(255, 255, 255, .78);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 68px 68px;
  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%);
}
.hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: 140%;
  height: 140px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, .06));
  z-index: -1;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}
@media (max-width: 1023px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 8px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  font-size: 13px;
  color: rgba(255, 255, 255, .86);
  backdrop-filter: blur(8px);
  margin-bottom: 26px;
}
.hero-badge i {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(0, 201, 167, .2);
  color: var(--accent-400);
}
.hero-badge svg { width: 13px; height: 13px; }

.hero h1 {
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.16;
  color: #fff;
  margin-bottom: 22px;
  letter-spacing: -.02em;
}
.hero h1 .hl {
  background: linear-gradient(105deg, #6fb2ff 0%, #22e0c0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: clamp(15px, 1.45vw, 18px);
  line-height: 1.85;
  color: rgba(255, 255, 255, .72);
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 640px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .13);
}
.hero-stats b {
  display: block;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -.01em;
}
.hero-stats span { font-size: 13px; color: rgba(255, 255, 255, .55); }

@media (max-width: 639px) {
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 14px; }
}

/* Hero 视觉：玻璃拟态面板 */
.hero-visual { position: relative; }
.hero-panel {
  position: relative;
  padding: 24px;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, .04));
  border: 1px solid rgba(255, 255, 255, .17);
  backdrop-filter: blur(18px);
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .8);
}
.hero-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.hero-panel-head h3 { font-size: 15px; color: #fff; font-weight: 600; }
.hero-panel-head span { font-size: 12px; color: rgba(255, 255, 255, .5); }

.hero-panel-list { display: grid; gap: 12px; }
.hero-panel-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .08);
  transition: background-color .22s var(--ease), transform .22s var(--ease);
}
.hero-panel-item:hover { background: rgba(255, 255, 255, .13); transform: translateX(4px); }
.hero-panel-item i {
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(61, 139, 255, .3), rgba(0, 201, 167, .22));
  color: #fff;
}
.hero-panel-item i svg { width: 18px; height: 18px; }
.hero-panel-item div { min-width: 0; }
.hero-panel-item strong { display: block; font-size: 14px; color: #fff; font-weight: 600; }
.hero-panel-item span { font-size: 12.5px; color: rgba(255, 255, 255, .55); }

.hero-float {
  position: absolute;
  right: -10px;
  bottom: -22px;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 18px 12px 13px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .95);
  box-shadow: var(--sh-lg);
  color: var(--ink-800);
}
.hero-float i {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  color: #fff;
}
.hero-float i svg { width: 18px; height: 18px; }
.hero-float strong { display: block; font-size: 14px; font-weight: 700; }
.hero-float span { font-size: 12px; color: var(--ink-400); }

@media (max-width: 639px) {
  .hero-float { position: static; margin-top: 18px; display: inline-flex; }
}

/* ---------- Logo / 行业标签墙 ---------- */
.trust-bar {
  padding: 34px 0;
  background: #fff;
  border-bottom: 1px solid var(--line-soft);
}
.trust-bar p {
  text-align: center;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--ink-300);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.trust-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.trust-tags span {
  padding: 9px 20px;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-500);
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.trust-tags span:hover { color: var(--brand-600); border-color: var(--brand-400); transform: translateY(-2px); }

/* ---------- Cards ---------- */
.card {
  position: relative;
  padding: 30px 28px;
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-xs);
  transition: transform .28s var(--ease-out), box-shadow .28s var(--ease-out),
              border-color .28s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-md);
  border-color: #d4e2f7;
}
.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: linear-gradient(140deg, var(--brand-50), var(--brand-100));
  color: var(--brand-600);
  transition: background .28s var(--ease), color .28s var(--ease), transform .28s var(--ease);
}
.card-icon svg { width: 26px; height: 26px; }
.card:hover .card-icon {
  background: linear-gradient(140deg, var(--brand-500), var(--brand-600));
  color: #fff;
  transform: rotate(-6deg);
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--ink-500); }
.card-list { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); }
.card-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-500);
  margin-bottom: 7px;
}
.card-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-400);
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-600);
}
.card-link svg { width: 16px; height: 16px; transition: transform .2s var(--ease); }
.card-link:hover svg { transform: translateX(4px); }

/* ---------- About 摘要 ---------- */
.about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}
@media (max-width: 1023px) { .about-split { grid-template-columns: minmax(0, 1fr); } }

.about-points { margin-top: 30px; display: grid; gap: 18px; }
.about-point { display: flex; gap: 15px; }
.about-point i {
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--brand-50);
  color: var(--brand-600);
}
.about-point i svg { width: 19px; height: 19px; }
.about-point h4 { font-size: 16px; margin-bottom: 4px; }
.about-point p { font-size: 14.5px; color: var(--ink-500); margin: 0; }

.info-card {
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-md);
  overflow: hidden;
}
.info-card-head {
  padding: 20px 26px;
  background: linear-gradient(120deg, var(--brand-800), var(--brand-600));
  color: #fff;
  display: flex;
  align-items: center;
  gap: 12px;
}
.info-card-head svg { width: 20px; height: 20px; opacity: .9; }
.info-card-head h3 { color: #fff; font-size: 16px; font-weight: 600; }
.info-table { width: 100%; border-collapse: collapse; }
.info-table th, .info-table td {
  padding: 14px 26px;
  font-size: 14.5px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }
.info-table th {
  width: 116px;
  font-weight: 500;
  color: var(--ink-400);
  background: #fbfcfe;
  white-space: nowrap;
}
.info-table td { color: var(--ink-800); font-weight: 500; }
.info-table code {
  font-family: "JetBrains Mono", Consolas, "Courier New", monospace;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--brand-700);
  word-break: break-all;
}

@media (max-width: 639px) {
  .info-table th, .info-table td { padding: 12px 14px; }
  .info-table th { width: 92px; font-size: 13.5px; }
  .info-table td { font-size: 13.5px; }
  .info-table code { font-size: 12.5px; letter-spacing: 0; }
}

/* ---------- 解决方案（交替布局） ---------- */
.solution {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 4.5vw, 64px);
  align-items: center;
  padding: clamp(36px, 4.4vw, 56px) 0;
  border-bottom: 1px solid var(--line);
}
.solution:last-child { border-bottom: 0; }
.solution--flip .solution-visual { order: -1; }
@media (max-width: 1023px) {
  .solution, .solution--flip .solution-visual { grid-template-columns: minmax(0, 1fr); order: 0; }
}

.solution-no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--brand-400);
  margin-bottom: 10px;
}
.solution h3 { font-size: clamp(21px, 2.3vw, 27px); margin-bottom: 14px; }
.solution p { color: var(--ink-500); }
.solution-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.solution-tags span {
  padding: 6px 14px;
  border-radius: var(--r-full);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-500);
}

/* 抽象界面示意图（纯 CSS） */
.solution-visual { position: relative; }
.mock {
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-lg);
  overflow: hidden;
}
.mock-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-200); }
.mock-bar i:nth-child(1) { background: #ff5f57; }
.mock-bar i:nth-child(2) { background: #febc2e; }
.mock-bar i:nth-child(3) { background: #28c840; }
.mock-bar span {
  margin-left: 10px;
  font-size: 12px;
  color: var(--ink-300);
  letter-spacing: .06em;
}
.mock-body { padding: 20px; display: grid; gap: 14px; }
.mock-row { display: flex; gap: 12px; }
.mock-card {
  flex: 1;
  padding: 14px;
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
}
.mock-card b { display: block; font-size: 19px; color: var(--ink-900); line-height: 1.3; }
.mock-card em {
  font-style: normal;
  font-size: 12px;
  color: var(--ink-400);
}
.mock-lines { display: grid; gap: 9px; }
.mock-lines i {
  display: block;
  height: 9px;
  border-radius: var(--r-full);
  background: linear-gradient(90deg, var(--brand-100), var(--line-soft));
}
.mock-lines i:nth-child(2) { width: 78%; }
.mock-lines i:nth-child(3) { width: 56%; }
.mock-bars { display: flex; align-items: flex-end; gap: 9px; height: 92px; }
.mock-bars i {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: linear-gradient(180deg, var(--brand-400), var(--brand-600));
}
.mock-bars i:nth-child(1) { height: 42%; }
.mock-bars i:nth-child(2) { height: 68%; }
.mock-bars i:nth-child(3) { height: 52%; }
.mock-bars i:nth-child(4) { height: 88%; }
.mock-bars i:nth-child(5) { height: 60%; }
.mock-bars i:nth-child(6) { height: 74%; }
.mock-bars i:nth-child(7) { height: 96%; }

/* ---------- 流程 ---------- */
.process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; position: relative; }
.process::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 16px);
  z-index: 0;
}
@media (max-width: 1023px) { .process { grid-template-columns: repeat(2, minmax(0, 1fr)); } .process::before { display: none; } }
@media (max-width: 639px) { .process { grid-template-columns: minmax(0, 1fr); } }

.process-step { position: relative; z-index: 1; text-align: center; }
.process-step i {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #fff;
  border: 2px solid var(--brand-100);
  color: var(--brand-600);
  font-style: normal;
  font-weight: 700;
  font-size: 18px;
  box-shadow: var(--sh-sm);
}
.process-step h4 { font-size: 17px; margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--ink-500); margin: 0; }

/* ---------- 案例 ---------- */
.case-card {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-xs);
  transition: transform .28s var(--ease-out), box-shadow .28s var(--ease-out);
  display: flex;
  flex-direction: column;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }
.case-cover {
  height: 168px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.case-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .09) 1px, transparent 1px);
  background-size: 28px 28px;
}
.case-cover span {
  position: relative;
  z-index: 1;
  padding: 8px 18px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .3);
  color: #fff;
  font-size: 13px;
  letter-spacing: .1em;
  backdrop-filter: blur(6px);
}
.cv-1 { background: linear-gradient(140deg, #1450b8, #3d8bff); }
.cv-2 { background: linear-gradient(140deg, #0b6f63, #00c9a7); }
.cv-3 { background: linear-gradient(140deg, #24356b, #5a6ee0); }
.cv-4 { background: linear-gradient(140deg, #0d4f7c, #23a3d8); }
.cv-5 { background: linear-gradient(140deg, #4a2f7a, #8a5cd6); }
.cv-6 { background: linear-gradient(140deg, #7a3d18, #e08a3c); }

.case-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 17px; margin-bottom: 10px; }
.case-body p { font-size: 14.5px; color: var(--ink-500); flex: 1; }
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}
.case-meta span {
  padding: 4px 11px;
  border-radius: var(--r-full);
  background: var(--bg-soft);
  font-size: 12px;
  color: var(--ink-400);
}

/* ---------- CTA ---------- */
.cta-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xl);
  padding: clamp(40px, 5.4vw, 72px);
  background:
    radial-gradient(700px 320px at 88% 12%, rgba(34, 224, 192, .3), transparent 60%),
    linear-gradient(130deg, var(--brand-800) 0%, var(--brand-600) 58%, #2b58d8 100%);
  color: rgba(255, 255, 255, .8);
  box-shadow: var(--sh-lg);
}
.cta-banner::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 40px solid rgba(255, 255, 255, .06);
}
.cta-banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-banner h2 { color: #fff; font-size: clamp(24px, 3vw, 36px); margin-bottom: 12px; }
.cta-banner p { color: rgba(255, 255, 255, .78); max-width: 620px; margin: 0; }
.cta-banner .btn--ghost { border-color: rgba(255, 255, 255, .5); }

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(48px, 6vw, 86px)) 0 clamp(44px, 5vw, 70px);
  background:
    radial-gradient(760px 420px at 82% 0%, rgba(28, 107, 224, .5), transparent 62%),
    linear-gradient(150deg, #061026, #0a1c3a 70%, #08182f);
  color: rgba(255, 255, 255, .72);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 30% 20%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 30% 20%, #000, transparent 75%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 {
  color: #fff;
  font-size: clamp(28px, 4vw, 46px);
  margin-bottom: 16px;
}
.page-hero p { max-width: 700px; font-size: clamp(15px, 1.3vw, 17px); color: rgba(255, 255, 255, .7); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
  margin-bottom: 20px;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-style: normal; opacity: .5; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-400), var(--line));
}
.timeline-item { position: relative; padding-bottom: 30px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--brand-500);
  box-shadow: 0 0 0 4px var(--brand-50);
}
.timeline-item b { display: block; font-size: 15px; color: var(--brand-600); margin-bottom: 4px; }
.timeline-item h4 { font-size: 17px; margin-bottom: 6px; }
.timeline-item p { font-size: 14.5px; color: var(--ink-500); margin: 0; }

/* ---------- 服务详情列表 ---------- */
.service-row {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(30px, 4vw, 48px) 0;
  border-bottom: 1px solid var(--line);
}
.service-row:last-child { border-bottom: 0; }
@media (max-width: 899px) { .service-row { grid-template-columns: minmax(0, 1fr); } }
.service-row h3 { font-size: 22px; margin-bottom: 10px; display: flex; align-items: center; gap: 12px; }
.service-row h3 i {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex: none;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--brand-50), var(--brand-100));
  color: var(--brand-600);
}
.service-row h3 i svg { width: 22px; height: 22px; }
.service-row > div > p { color: var(--ink-500); }
.service-items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
@media (max-width: 599px) { .service-items { grid-template-columns: minmax(0, 1fr); } }
.service-item {
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
}
.service-item strong { display: block; font-size: 15px; margin-bottom: 5px; color: var(--ink-800); }
.service-item p { font-size: 13.5px; color: var(--ink-500); margin: 0; }

/* ---------- SLA 表格 ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--r-md); border: 1px solid var(--line); }
.sla-table { width: 100%; border-collapse: collapse; min-width: 640px; background: #fff; }
.sla-table th, .sla-table td { padding: 16px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line-soft); }
.sla-table thead th { background: var(--bg-soft); color: var(--ink-800); font-weight: 600; font-size: 14px; }
.sla-table tbody tr:last-child td { border-bottom: 0; }
.sla-table tbody tr:hover { background: var(--brand-50); }
.sla-table td { color: var(--ink-500); }
.sla-table td:first-child { color: var(--ink-800); font-weight: 600; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(30px, 4.5vw, 64px);
  align-items: start;
}
@media (max-width: 1023px) { .contact-grid { grid-template-columns: minmax(0, 1fr); } }

.contact-list { display: grid; gap: 14px; margin-top: 26px; }
.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-xs);
}
.contact-item i {
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--brand-50);
  color: var(--brand-600);
}
.contact-item i svg { width: 21px; height: 21px; }
.contact-item b { display: block; font-size: 13px; color: var(--ink-400); font-weight: 500; margin-bottom: 4px; }
.contact-item span { font-size: 15.5px; color: var(--ink-800); font-weight: 500; word-break: break-all; }

.map-card {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--sh-md);
  background: #fff;
}
.map-view {
  position: relative;
  height: 340px;
  background:
    radial-gradient(600px 300px at 30% 20%, rgba(28, 107, 224, .16), transparent 60%),
    repeating-linear-gradient(0deg, #eef3fa 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, #eef3fa 0 1px, transparent 1px 44px),
    #f7fafe;
  display: grid;
  place-items: center;
}
.map-pin {
  position: relative;
  display: grid;
  place-items: center;
}
.map-pin i {
  width: 54px;
  height: 54px;
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  display: grid;
  place-items: center;
  box-shadow: 0 14px 30px -12px rgba(20, 80, 184, .9);
}
.map-pin i svg { width: 22px; height: 22px; color: #fff; transform: rotate(45deg); }
.map-pin::after {
  content: "";
  position: absolute;
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: rgba(28, 107, 224, .18);
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0% { transform: scale(.7); opacity: .85; }
  70% { transform: scale(1.5); opacity: 0; }
  100% { opacity: 0; }
}
.map-caption {
  padding: 22px 26px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.map-caption b { display: block; font-size: 15px; margin-bottom: 6px; }
.map-caption p { font-size: 14.5px; color: var(--ink-500); margin: 0; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: #fff;
  padding: 0 22px;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.faq details[open] { box-shadow: var(--sh-sm); border-color: #d4e2f7; }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 19px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-800);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  width: 10px;
  height: 10px;
  flex: none;
  border-right: 2px solid var(--brand-500);
  border-bottom: 2px solid var(--brand-500);
  transform: rotate(45deg) translateY(-3px);
  transition: transform .25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
.faq .faq-body { padding-bottom: 20px; font-size: 14.5px; color: var(--ink-500); }

/* ---------- Footer ---------- */
.site-footer { background: var(--brand-950); color: rgba(255, 255, 255, .6); }
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 40px;
  padding: clamp(48px, 6vw, 76px) 0 44px;
}
@media (max-width: 1023px) { .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 599px) { .footer-top { grid-template-columns: minmax(0, 1fr); gap: 32px; } }

.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.9; max-width: 360px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 18px;
  font-weight: 600;
}
.footer-col li { margin-bottom: 11px; }
.footer-col a { font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-col p { font-size: 14px; line-height: 1.9; }
.footer-col .lic { font-size: 13px; color: rgba(255, 255, 255, .42); margin-top: 14px; line-height: 1.8; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 24px 0;
}
.footer-bottom .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}
.footer-bottom p { margin: 0; font-size: 13px; color: rgba(255, 255, 255, .48); }
.footer-filing { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.footer-filing a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .68);
}
.footer-filing a:hover { color: #fff; }
.footer-filing svg { width: 14px; height: 14px; opacity: .7; }
.footer-filing .sep { color: rgba(255, 255, 255, .25); }

/* 占位符样式：需用户替换 */
.ph {
  color: var(--brand-500);
  border-bottom: 1px dashed currentColor;
  padding-bottom: 1px;
}

/* ---------- 滚动动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--brand-600);
  color: #fff;
  box-shadow: var(--sh-brand);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  z-index: 90;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--brand-500); }
.to-top svg { width: 20px; height: 20px; }

/* ---------- 留言表单 ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-md);
  padding: clamp(26px, 3.4vw, 44px);
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
@media (max-width: 1023px) { .form-grid { grid-template-columns: minmax(0, 1fr); } }

.field--full { grid-column: 1 / -1; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-800);
  margin-bottom: 8px;
}
.field label em { font-style: normal; color: #e05252; }
.field label .opt { font-weight: 400; font-size: 13px; color: var(--ink-300); }

.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  font: inherit;
  font-size: 15px;
  color: var(--ink-800);
  background: #fff;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.field textarea { resize: vertical; min-height: 112px; line-height: 1.7; }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-300); }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--brand-400);
  box-shadow: 0 0 0 3px rgba(61, 139, 255, .16);
}
.field.has-error input, .field.has-error textarea {
  border-color: #e05252;
  box-shadow: 0 0 0 3px rgba(224, 82, 82, .12);
}
.field-err {
  display: block;
  font-size: 12.5px;
  color: #e05252;
  margin-top: 6px;
}
.field-err:empty { display: none; }

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}
.form-note { font-size: 13px; color: var(--ink-300); margin: 0; flex: 1; min-width: 220px; }

.form-result {
  margin-top: 24px;
  border-radius: var(--r-md);
  border: 1px solid #cde9e2;
  background: linear-gradient(140deg, #f3fbf9, #e9f6f2);
  padding: 22px 24px;
}
.form-result h4 { font-size: 16px; color: #0a6b5c; margin-bottom: 10px; }
.form-result pre {
  margin: 0;
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-700);
  white-space: pre-wrap;
  word-break: break-word;
}
.form-result .btn { margin-top: 16px; }

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.nowrap { white-space: nowrap; }
.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;
}