/* ============================================================
   香港明天科技有限公司 · Apple-style tech site
   Taste-skill audit pass: 单一主题分块（黑-白-黑）、单一强调色、
   圆角体系（卡片 20-28px / 按钮全圆）、眉头 ≤1/3 区块、零破折号。
   ============================================================ */

:root {
  --white: #ffffff;
  --ink: #1d1d1f;
  --heading: #16305e;
  --bg-light: #f2f6fc;
  --bg-black: #0a0a0c;      /* 主题带深色基底（非纯黑） */
  --bg-deep: #06080d;       /* 深色带内的家族层次 */
  --text-dark: #1d1d1f;
  --text-gray: #6e6e73;
  --text-dim: #a1a1a6;
  --blue: #0071e3;          /* 全站唯一强调色 */
  --blue-hover: #0077ed;
  --grad-a: #00c6ff;
  --grad-b: #0072ff;
  --line: rgba(255, 255, 255, 0.1);
  --nav-h: 64px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "PingFang SC", "PingFang TC", "Helvetica Neue", "Noto Sans CJK SC",
          "Noto Sans CJK TC", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { font: inherit; }
::selection { background: rgba(0, 114, 227, 0.25); }

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

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(120, 120, 128, 0.4);
  border-radius: 99px;
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background-color: rgba(120, 120, 128, 0.65); }

.container {
  width: min(1080px, calc(100% - 48px));
  margin-inline: auto;
}
.container-narrow { width: min(780px, calc(100% - 48px)); }

/* ===================== 通用部件 ===================== */

/* 渐变文字仅用于 Hero 关键词与 CTA 一个词，其余标题纯色 */
.grad-text {
  background: linear-gradient(100deg, #0090ff, #0053bd 60%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.grad-shimmer {
  background-size: 220% 100%;
  animation: shimmer 6s ease-in-out infinite alternate;
}
@keyframes shimmer {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 980px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.25s ease, color 0.25s ease, transform 0.3s var(--ease),
    box-shadow 0.25s ease, border-color 0.25s ease;
}
.btn-lg { padding: 16px 32px; font-size: 17px; }
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 114, 227, 0.32);
}
.btn-primary:hover { background: var(--blue-hover); box-shadow: 0 12px 30px rgba(0, 114, 227, 0.4); }
.btn:active { transform: translateY(1px) scale(0.98); }
.magnet { will-change: transform; }

/* Hero 次级文字链接（Apple 的 Learn more > 风格） */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 17px;
  color: var(--blue);
}
.link-arrow::after { content: "›"; font-size: 22px; line-height: 1; transition: transform 0.3s var(--ease); }
.link-arrow:hover::after { transform: translateX(3px); }

/* ===================== 滚动渐显 ===================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
body.no-js .reveal { opacity: 1; transform: none; }

/* ===================== 开场加载 ===================== */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--white);
  display: grid;
  place-items: center;
  transition: opacity 0.7s ease 0.15s, visibility 0.7s ease 0.15s;
  animation: plAutoHide 0.7s ease 3.2s forwards;
}
@keyframes plAutoHide { to { opacity: 0; visibility: hidden; } }
body.loaded .preloader { opacity: 0; visibility: hidden; }
.preloader-mark { text-align: center; }
.preloader-mark img {
  display: block;
  margin-inline: auto;
  width: 96px;
  height: auto;
  opacity: 0;
  transform: translateY(12px) scale(0.94);
  animation: plMark 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
  filter: drop-shadow(0 8px 20px rgba(0, 120, 255, 0.35));
}
@keyframes plMark { to { opacity: 1; transform: none; } }
.preloader-name {
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5em;
  margin-top: 22px;
  padding-left: 0.5em;
  opacity: 0;
  animation: plName 0.8s ease 0.7s forwards;
}
@keyframes plName { to { opacity: 1; } }

/* ===================== 导航 ===================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--nav-h);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.45) 40%, rgba(255, 255, 255, 0.6)),
    rgba(255, 255, 255, 0.55);
  backdrop-filter: saturate(180%) blur(24px) contrast(1.05);
  -webkit-backdrop-filter: saturate(180%) blur(24px) contrast(1.05);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7), inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  color: var(--ink);
  transition: background 0.4s ease;
}
.nav.scrolled {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.015) 40%, rgba(255, 255, 255, 0.04)),
    rgba(255, 255, 255, 0.88);
}
.nav-progress { position: absolute; top: 0; left: 0; right: 0; height: 2px; }
.nav-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  transform-origin: 0 50%;
  transform: scaleX(0);
}
/* 滚动进度：CSS 滚动驱动动画（无 JS scroll 监听） */
@supports (animation-timeline: scroll()) {
  .nav-progress span {
    animation: growX linear both;
    animation-timeline: scroll(root);
  }
}
@keyframes growX { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.nav-inner {
  width: min(1080px, calc(100% - 48px));
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { display: grid; place-items: center; filter: drop-shadow(0 0 10px rgba(0, 150, 255, 0.55)); }
.logo-mark img { display: block; width: 54px; height: auto; }
.logo-text {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink);
}
.logo-text em {
  font-style: normal;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--text-gray);
}
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin-left: auto; }
.nav-links a {
  font-size: 13.5px;
  color: rgba(29, 29, 31, 0.72);
  padding: 8px 13px;
  border-radius: 980px;
  transition: color 0.25s ease, background 0.25s ease;
}
.nav-links a:hover { color: var(--ink); background: rgba(0, 0, 0, 0.05); }
.nav-links a.active { color: var(--ink); background: rgba(0, 0, 0, 0.07); }
.nav-cta {
  flex-shrink: 0;
  font-size: 13.5px;
  font-weight: 500;
  color: #fff;
  background: var(--blue);
  padding: 8px 18px;
  border-radius: 980px;
  transition: background 0.25s ease;
}
.nav-cta:hover { background: var(--blue-hover); }
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  align-items: center;
}
.nav-burger span {
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease);
}
.nav-burger.open span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }
.nav-drawer {
  display: none;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  padding: 12px 24px 28px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}
.nav-drawer.open { display: flex; animation: drawerIn 0.35s var(--ease); }
@keyframes drawerIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; } }
.nav-drawer a {
  color: rgba(29, 29, 31, 0.85);
  font-size: 17px;
  padding: 12px 4px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.nav-drawer .drawer-cta { color: var(--blue); font-weight: 600; border-bottom: none; }

/* ===================== Hero ===================== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 720px 720px at 8% 4%, rgba(0, 114, 255, 0.2), transparent 65%),
    radial-gradient(ellipse 640px 640px at 94% 20%, rgba(0, 198, 255, 0.14), transparent 65%),
    radial-gradient(ellipse 760px 460px at 50% 110%, rgba(125, 95, 255, 0.1), transparent 65%),
    var(--white);
  color: var(--text-dark);
  text-align: center;
  padding: calc(var(--nav-h) + 48px) 24px 88px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; }
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.45; }
.hero-grid {
  position: absolute;
  inset: -1px;
  background-image:
    linear-gradient(rgba(0, 114, 227, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 114, 227, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 72% at 50% 44%, #000 25%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 90% 72% at 50% 44%, #000 25%, transparent 72%);
}
.hero-fade {
  position: absolute;
  inset: auto 0 0 0;
  height: 120px;
  background: linear-gradient(transparent, var(--white));
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero-eyebrow {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.34em;
  padding-left: 0.34em;
  color: var(--text-dim);
  margin-bottom: 30px;
}
.hero-title {
  color: var(--heading);
  font-size: clamp(46px, 8.4vw, 92px);
  font-weight: 700;
  letter-spacing: -0.024em;
  line-height: 1.08;
}
.title-line { display: block; }
.char { display: inline-block; }

.hero-sub {
  margin-top: 30px;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.7;
  color: var(--text-gray);
}
.hero-sub .hl {
  color: var(--ink);
  font-weight: 600;
  background: linear-gradient(transparent 70%, rgba(0, 114, 227, 0.4) 70%);
  padding: 0 2px;
}
.hero-actions {
  margin-top: 44px;
  display: flex;
  gap: 26px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* Hero 入场动画（加载完成后触发） */
body.js:not(.loaded) .hero-content > * { opacity: 0; }
body.loaded .hero-eyebrow { animation: heroUp 0.9s var(--ease) 0.05s both; }
body.loaded .hero-title .title-line:first-child { animation: heroUp 1s var(--ease) 0.15s both; }
body.loaded .hero-title .title-line:last-child { animation: heroUp 1s var(--ease) 0.28s both; }
body.loaded .hero-sub { animation: heroUp 1s var(--ease) 0.42s both; }
body.loaded .hero-actions { animation: heroUp 1s var(--ease) 0.54s both; }
@keyframes heroUp {
  from { opacity: 0; transform: translateY(34px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===================== 业务巡游条 ===================== */
.marquee {
  background: var(--bg-light);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  overflow: hidden;
  padding: 22px 0;
  position: relative;
}
.marquee::before, .marquee::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 120px;
  z-index: 1;
  pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, var(--bg-light), transparent); }
.marquee::after { right: 0; background: linear-gradient(-90deg, var(--bg-light), transparent); }
.marquee-track {
  display: flex;
  align-items: center;
  gap: 44px;
  width: max-content;
  animation: mq 38s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes mq { to { transform: translateX(-50%); } }
.mq {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: rgba(29, 29, 31, 0.5);
  white-space: nowrap;
}
.mq-star { color: rgba(0, 198, 255, 0.5); font-size: 11px; }

/* ===================== 通用 Section ===================== */
.section { padding: clamp(96px, 13vw, 150px) 0; }
.section-white { background: #fff; color: var(--text-dark); }
.section-tint { background: var(--bg-light); color: var(--text-dark); }
.section-dark { background: var(--bg-light); color: var(--text-dark); }
.section-deep { background: #fff; color: var(--text-dark); }

.section-head { margin-bottom: clamp(44px, 6vw, 64px); }
.section-eyebrow {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--blue);
  margin-bottom: 18px;
  font-family: var(--mono);
}
.section-dark .section-eyebrow, .section-deep .section-eyebrow { color: var(--blue); }
.section-title {
  color: var(--heading);
  font-size: clamp(36px, 5.4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.14;
}
.section-lead {
  margin-top: 24px;
  max-width: 620px;
  font-size: clamp(17px, 2vw, 19px);
  color: var(--text-gray);
  line-height: 1.65;
}

/* ===================== 解决方案（非对称 12 列网格） ===================== */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
  perspective: 1200px;
}
.sol-7 { grid-column: span 7; }
.sol-6 { grid-column: span 6; }
.sol-5 { grid-column: span 5; }
.sol-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 36px 32px 30px;
  background: #f6f9fe;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  overflow: hidden;
  isolation: isolate;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease),
    border-color 0.4s ease;
}
.sol-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 160, 255, 0.08), rgba(0, 114, 227, 0.06));
  opacity: 0;
  transition: opacity 0.45s ease;
  z-index: -1;
}
.sol-card:hover {
  box-shadow: 0 28px 56px -18px rgba(0, 0, 0, 0.14);
  border-color: rgba(0, 114, 227, 0.2);
}
.sol-card:hover::before { opacity: 1; }
.sol-head { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.sol-icon {
  width: 40px;
  height: 40px;
  color: var(--blue);
  flex-shrink: 0;
  transition: transform 0.5s var(--ease);
}
.sol-icon svg { width: 100%; height: 100%; }
.sol-icon svg * {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.sol-card:hover .sol-icon { transform: translateY(-2px) scale(1.05); }
.sol-icon svg [pathLength] { stroke-dasharray: 1; stroke-dashoffset: 0; }
.sol-card:hover .sol-icon svg [pathLength] { animation: drawStroke 1s cubic-bezier(0.65, 0, 0.35, 1) both; }
.sol-card:hover .sol-icon svg *:nth-child(2) { animation-delay: 0.08s; }
.sol-card:hover .sol-icon svg *:nth-child(3) { animation-delay: 0.16s; }
.sol-card:hover .sol-icon svg *:nth-child(4) { animation-delay: 0.24s; }
.sol-card:hover .sol-icon svg *:nth-child(5) { animation-delay: 0.32s; }
.sol-card:hover .sol-icon svg *:nth-child(6) { animation-delay: 0.4s; }
.sol-card:hover .sol-icon svg *:nth-child(7) { animation-delay: 0.48s; }
.sol-card:hover .sol-icon svg *:nth-child(8) { animation-delay: 0.56s; }
@keyframes drawStroke { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }

.sol-head h3 { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.sol-card > p { font-size: 15.5px; color: var(--text-gray); line-height: 1.68; flex: 1; }
.sol-more { margin-top: 20px; font-size: 15px; font-weight: 500; color: var(--blue); }
.sol-more i { font-style: normal; display: inline-block; transition: transform 0.3s var(--ease); }
.sol-card:hover .sol-more i { transform: translateX(5px); }

.sol-card-accent {
  background: linear-gradient(150deg, #0b1526, #0e1c33 60%, #101f38);
  color: #f5f5f7;
}
.sol-card-accent .sol-head h3 { color: #fff; }
.sol-card-accent > p { color: rgba(245, 245, 247, 0.72); }
.sol-card-accent .sol-icon { color: var(--grad-a); }
.sol-card-accent .sol-more { color: var(--grad-a); }
.sol-card-accent:hover {
  border-color: rgba(0, 198, 255, 0.4);
  box-shadow: 0 28px 56px -18px rgba(0, 114, 227, 0.4);
}

/* ===================== 方法论（编号横排 + 细线分隔） ===================== */
.method-rows { border-top: 1px solid rgba(0, 0, 0, 0.08); }
.method-row {
  display: grid;
  grid-template-columns: 110px 280px 1fr;
  gap: 32px;
  align-items: start;
  padding: 42px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}
.method-num {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(160deg, rgba(0, 114, 227, 0.22), rgba(0, 114, 227, 0.06));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.method-row h3 { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; padding-top: 8px; }
.method-row p { font-size: 15.5px; line-height: 1.75; color: var(--text-gray); padding-top: 10px; }

/* ===================== 集成架构（层叠条） ===================== */
.arch { position: relative; }
.arch-layer {
  display: grid;
  grid-template-columns: minmax(180px, 270px) 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-light);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.arch-layer:hover {
  transform: translateX(6px);
  box-shadow: 0 22px 44px -20px rgba(0, 0, 0, 0.16);
}
.arch-layer-head { display: flex; align-items: center; gap: 16px; }
.arch-no {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  width: 40px; height: 40px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 6px 16px -4px rgba(0, 114, 227, 0.5);
}
.arch-layer-head h3 { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.arch-layer > p { font-size: 15.5px; color: var(--text-gray); line-height: 1.68; }
.arch-tags { display: flex; gap: 8px; list-style: none; flex-wrap: wrap; justify-content: flex-end; }
.arch-tags li {
  font-size: 13px;
  font-weight: 500;
  color: #14508f;
  background: rgba(0, 102, 204, 0.05);
  border: 1px solid rgba(0, 102, 204, 0.16);
  padding: 6px 14px;
  border-radius: 980px;
  white-space: nowrap;
}
.arch-connector {
  width: 2px;
  height: 36px;
  margin: 6px 0 6px 56px;
  background: linear-gradient(180deg, var(--grad-a), var(--grad-b));
  border-radius: 2px;
  opacity: 0.65;
  position: relative;
}
.arch-connector::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  border-right: 2px solid var(--grad-b);
  border-bottom: 2px solid var(--grad-b);
}
.arch-governance {
  margin-top: 40px;
  padding: 32px 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
  background: linear-gradient(100deg, #0b1526, #12203a);
  color: #f5f5f7;
  box-shadow: 0 24px 48px -22px rgba(0, 60, 160, 0.5);
}
.gov-badge {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--grad-a);
  border: 1px solid rgba(0, 198, 255, 0.45);
  padding: 7px 16px;
  border-radius: 980px;
  white-space: nowrap;
}
.arch-governance h3 { font-size: 20px; font-weight: 600; }
.arch-governance p {
  font-size: 15px;
  color: rgba(245, 245, 247, 0.68);
  letter-spacing: 0.04em;
  margin-left: auto;
}

/* ===================== 服务对象（左标题右列表分栏） ===================== */
.clients-split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.clients-head { position: sticky; top: 110px; }
.client-row {
  display: flex;
  gap: 22px;
  padding: 34px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}
.client-row:first-child { padding-top: 6px; }
.client-icon {
  width: 44px;
  height: 44px;
  color: var(--blue);
  flex-shrink: 0;
  padding-top: 2px;
}
.client-icon svg { width: 100%; height: 100%; }
.client-icon svg * {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.client-row h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.client-row p { font-size: 15.5px; color: var(--text-gray); line-height: 1.72; }

/* ===================== 合作方式（字母条目 + 细线） ===================== */
.engage-rows { border-top: 1px solid rgba(0, 0, 0, 0.08); }
.engage-row {
  display: grid;
  grid-template-columns: 72px 280px 1fr;
  gap: 28px;
  align-items: start;
  padding: 38px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}
.engage-letter {
  display: grid;
  place-items: center;
  width: 48px; height: 48px;
  border-radius: 16px;
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  background: rgba(0, 114, 227, 0.08);
}
.engage-row h3 { font-size: 20px; font-weight: 600; padding-top: 10px; }
.engage-row p { font-size: 15.5px; color: var(--text-gray); line-height: 1.72; padding-top: 12px; }

.first-call { margin-top: 56px; }
.first-call-inner {
  border-radius: var(--radius-lg);
  padding: clamp(36px, 5vw, 56px);
  background: linear-gradient(120deg, rgba(0, 114, 255, 0.06), rgba(0, 114, 227, 0.09) 45%, rgba(125, 95, 255, 0.07));
  border: 1px solid rgba(0, 102, 204, 0.14);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}
.first-call h3 { font-size: clamp(22px, 3vw, 28px); font-weight: 600; letter-spacing: -0.01em; }
.first-call ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px 40px;
}
.first-call li { font-size: 16px; padding-left: 28px; position: relative; }
.first-call li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 14px; height: 8px;
  border-left: 2.5px solid var(--blue);
  border-bottom: 2.5px solid var(--blue);
  transform: rotate(-45deg);
}

/* ===================== FAQ ===================== */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff;
  border-radius: 18px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: box-shadow 0.35s ease, border-color 0.35s ease;
}
.faq-item[open] {
  border-color: rgba(0, 114, 227, 0.25);
  box-shadow: 0 16px 36px -16px rgba(0, 114, 227, 0.16);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: color 0.25s ease;
  -webkit-user-select: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--blue); }
.faq-chevron {
  position: relative;
  width: 12px; height: 12px;
  flex-shrink: 0;
  transition: transform 0.35s var(--ease);
}
.faq-chevron::before, .faq-chevron::after {
  content: "";
  position: absolute;
  background: var(--blue);
  border-radius: 2px;
}
.faq-chevron::before { left: 5px; top: 0; width: 2px; height: 12px; }
.faq-chevron::after { left: 0; top: 5px; width: 12px; height: 2px; }
.faq-item[open] .faq-chevron { transform: rotate(135deg); }
.faq-body { padding: 0 26px; }
.faq-body p {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-gray);
  padding-bottom: 24px;
  animation: faqOpen 0.45s var(--ease);
}
@keyframes faqOpen { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; } }

/* ===================== Bento 核心能力（深色展示带） ===================== */
.bento-section {
  background:
    radial-gradient(ellipse 60% 40% at 15% 0%, rgba(0, 114, 227, 0.14), transparent 60%),
    radial-gradient(ellipse 50% 36% at 90% 100%, rgba(0, 114, 227, 0.08), transparent 60%),
    var(--bg-light);
}
.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(150px, auto);
  gap: 18px;
}
.bento-tile {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 0, 0, 0.07);
  background: #fff;
  padding: 32px 30px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.4s ease;
}
.bento-tile:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 102, 204, 0.4);
  box-shadow: 0 20px 44px -18px rgba(15, 30, 60, 0.14);
}
.tile-a { grid-column: span 2; grid-row: span 2; justify-content: flex-end; }
.tile-b { grid-column: span 2; }
.tile-c, .tile-d { grid-column: span 1; }
.tile-e, .tile-f { grid-column: span 2; }
.tile-copy h3 { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 8px; }
.tile-copy p { font-size: 14.5px; line-height: 1.65; color: var(--text-gray); }

/* · A. 轨道场景 · */
.orbit-scene {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 20px auto 40px;
  flex: 1;
  display: grid;
  place-items: center;
}
.orbit-core {
  position: relative;
  z-index: 2;
  width: 62px;
  height: 62px;
  border-radius: 18px;
  background: linear-gradient(140deg, #eaf4ff, #d9eaff);
  border: 1px solid rgba(0, 102, 204, 0.4);
  display: grid;
  place-items: center;
  box-shadow: 0 14px 30px -12px rgba(0, 114, 227, 0.4);
}
.orbit-core svg { width: 30px; height: 30px; }
.orbit {
  position: absolute;
  border: 1px solid rgba(0, 102, 204, 0.28);
  border-radius: 50%;
}
.orbit-1 { inset: 34px; animation: spin 22s linear infinite; }
.orbit-2 { inset: 14px; animation: spin 34s linear infinite reverse; }
.orbit-3 {
  inset: -6px;
  border-style: dashed;
  border-color: rgba(0, 102, 204, 0.28);
  animation: spin 60s linear infinite;
}
.sat {
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad-a);
  box-shadow: 0 0 10px var(--grad-a);
}
.s1 { top: -4.5px; left: calc(50% - 4px); }
.s2 { top: -4.5px; left: calc(50% - 4px); background: var(--grad-b); box-shadow: 0 0 10px var(--grad-b); }
.s3 { bottom: -4.5px; left: calc(50% - 4px); }
.s4 { bottom: 14px; right: -3px; background: var(--grad-b); box-shadow: 0 0 10px var(--grad-b); }
@keyframes spin { to { transform: rotate(360deg); } }

/* · B. 流程脉冲 · */
.flow-scene {
  position: relative;
  height: 46px;
  margin-top: 28px;
}
.flow-line {
  position: absolute;
  left: 8%; right: 8%;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 102, 204, 0.45), transparent);
}
.flow-node {
  position: absolute;
  top: 50%;
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 2px solid var(--blue);
  background: #fff;
  transform: translateY(-50%);
}
.flow-node:nth-child(1) { left: 8%; }
.flow-node:nth-child(2) { left: 50%; }
.flow-node:nth-child(3) { left: 92%; }
.flow-pulse {
  position: absolute;
  top: 50%;
  left: 8%;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--grad-a);
  box-shadow: 0 0 14px var(--grad-a);
  transform: translateY(-50%);
  animation: flowTravel 4.5s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
@keyframes flowTravel {
  0% { left: 8%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { left: 92%; opacity: 0; }
}

/* · C. 可验收 · */
.check-scene {
  position: relative;
  width: 104px;
  height: 104px;
  margin: 6px auto 20px;
  flex: 1;
  display: grid;
  place-items: center;
}
.check-halo {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(40, 200, 64, 0.35);
  animation: halo 2.6s ease-out infinite;
}
@keyframes halo {
  0% { transform: scale(0.72); opacity: 0.9; }
  100% { transform: scale(1.15); opacity: 0; }
}
.check-svg { width: 64px; height: 64px; color: #28c840; }
.check-svg * {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.check-svg [pathLength] { stroke-dasharray: 1; stroke-dashoffset: 1; }
.bento-tile.tile-c.reveal.visible .check-svg [pathLength] {
  animation: drawStroke 0.9s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}
.bento-tile.tile-c.reveal.visible .check-svg *:last-child { animation-delay: 0.55s; }
.tile-c .tile-copy { text-align: center; }

/* · D. 全球 · */
.globe-scene {
  position: relative;
  width: 116px;
  height: 116px;
  margin: 6px auto 20px;
  flex: 1;
}
.globe {
  position: absolute;
  inset: 0;
  border: 1.5px solid rgba(0, 198, 255, 0.5);
  border-radius: 50%;
  overflow: hidden;
}
.lat, .lng { position: absolute; border: 1px solid rgba(0, 198, 255, 0.3); border-radius: 50%; }
.lat-1 { width: 74%; height: 30%; top: 6%; left: 13%; }
.lat-2 { width: 90%; height: 44%; top: 26%; left: 5%; }
.lat-3 { width: 68%; height: 26%; top: 62%; left: 16%; }
.lng { width: 56%; height: 96%; top: 2%; left: 22%; }
.globe-ring {
  position: absolute;
  inset: -12px;
  border: 1px dashed rgba(0, 198, 255, 0.3);
  border-radius: 50%;
  animation: spin 40s linear infinite;
}
.tile-d .tile-copy { text-align: center; }

/* · E. 文档 · */
.doc-list { list-style: none; margin-top: 22px; display: grid; gap: 10px; }
.doc-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  color: rgba(29, 29, 31, 0.78);
}
.doc-check {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1px solid rgba(0, 102, 204, 0.5);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.doc-check::after {
  content: "";
  width: 9px; height: 5px;
  border-left: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(-45deg) translateY(-1px);
}
.bento-tile.tile-e.reveal.visible .doc-list li { animation: fadeLeft 0.6s var(--ease) both; }
.bento-tile.tile-e.reveal.visible .doc-list li:nth-child(1) { animation-delay: 0.3s; }
.bento-tile.tile-e.reveal.visible .doc-list li:nth-child(2) { animation-delay: 0.45s; }
.bento-tile.tile-e.reveal.visible .doc-list li:nth-child(3) { animation-delay: 0.6s; }
.bento-tile.tile-e.reveal.visible .doc-list li:nth-child(4) { animation-delay: 0.75s; }
@keyframes fadeLeft { from { opacity: 0; transform: translateX(-14px); } to { opacity: 1; } }

/* · F. 运维 · */
.uptime {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 22px;
}
.live-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #28c840;
  box-shadow: 0 0 10px #28c840;
  animation: pulseDot 2s ease-in-out infinite;
}
.live-text { font-size: 13.5px; color: var(--text-gray); letter-spacing: 0.06em; }
@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.45); opacity: 0.6; }
}

/* ===================== 交付流程（时间轴） ===================== */
.process-section {
  background:
    radial-gradient(ellipse 55% 35% at 85% 8%, rgba(0, 114, 227, 0.09), transparent 60%),
    #fff;
}
.timeline { position: relative; padding-top: 14px; }
.timeline-track {
  position: absolute;
  top: 24px;
  left: 2%;
  right: 2%;
  height: 2px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 2px;
  overflow: hidden;
}
.timeline-track span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  transform-origin: 0 50%;
  transform: scaleX(1);
}
/* 进度线：CSS 滚动驱动（view timeline 由 .timeline 提供） */
@supports (animation-timeline: view()) {
  .timeline { view-timeline: --steps; }
  .timeline-track span {
    transform: scaleX(0);
    animation: growX linear both;
    animation-timeline: --steps;
  }
}
.timeline-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.t-step { position: relative; padding-top: 46px; }
.t-dot {
  position: absolute;
  top: 17px;
  left: 0;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(29, 29, 31, 0.3);
  transition: border-color 0.4s ease, box-shadow 0.4s ease, background 0.4s ease;
}
.t-step.done .t-dot {
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  border-color: transparent;
  box-shadow: 0 0 16px rgba(0, 150, 255, 0.8);
}
.t-step h3 { font-size: 18.5px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.t-step p { font-size: 14px; line-height: 1.68; color: var(--text-gray); }

/* ===================== 关于我们 ===================== */
.about {
  background:
    radial-gradient(ellipse 55% 45% at 10% 100%, rgba(0, 114, 227, 0.08), transparent 65%),
    #fff;
}
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.about-text { margin-top: 26px; font-size: 17px; line-height: 1.9; color: var(--text-gray); }
.about-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 24px 54px -24px rgba(15, 30, 60, 0.16);
  padding: 38px 36px;
}
.about-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(0, 198, 255, 0.5), transparent 40%, transparent 60%, rgba(0, 114, 227, 0.4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.about-facts { display: flex; flex-direction: column; gap: 24px; }
.about-facts > div { padding-bottom: 22px; border-bottom: 1px solid rgba(0, 0, 0, 0.08); }
.about-facts > div:last-child { border-bottom: none; padding-bottom: 0; }
.about-facts dt {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--blue);
  margin-bottom: 8px;
}
.about-facts dd { font-size: 15.5px; line-height: 1.6; color: rgba(29, 29, 31, 0.85); }

/* ===================== CTA ===================== */
.cta {
  position: relative;
  background: linear-gradient(180deg, #ffffff, #e9f1fc);
  color: var(--text-dark);
  text-align: center;
  overflow: hidden;
}
.cta-glow {
  position: absolute;
  left: 50%;
  top: 62%;
  width: 720px; height: 420px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(0, 114, 227, 0.14), transparent 70%);
  animation: ctaBreath 7s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes ctaBreath {
  from { opacity: 0.75; transform: translate(-50%, -50%) scale(0.95); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1.06); }
}
.cta-inner { position: relative; z-index: 1; }
.cta-inner h2 {
  color: var(--heading);
  font-size: clamp(38px, 6.4vw, 68px);
  font-weight: 700;
  letter-spacing: -0.024em;
  line-height: 1.12;
}
.cta-inner > p {
  margin-top: 24px;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-gray);
}
.cta-actions { margin-top: 44px; }
.cta-alt { margin-top: 22px; font-size: 15px; color: var(--text-gray); }
.cta-alt a { color: var(--ink); border-bottom: 1px solid rgba(0, 0, 0, 0.35); transition: border-color 0.25s ease; }
.cta-alt a:hover { border-color: rgba(0, 0, 0, 0.7); }

/* ===================== Footer ===================== */
.footer {
  background: var(--bg-light);
  color: var(--text-gray);
  border-top: 1px solid rgba(0, 0, 0, 0.07);
  padding: 64px 0 40px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; }
.footer-brand .nav-logo { margin-bottom: 18px; }
.footer-brand > p { font-size: 14.5px; line-height: 1.7; max-width: 280px; margin-top: 4px; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 6px;
}
.footer-col a { font-size: 14px; color: rgba(29, 29, 31, 0.66); transition: color 0.25s ease; }
.footer-col a:hover { color: var(--ink); }
.footer-addr { font-size: 13.5px; line-height: 1.7; color: rgba(29, 29, 31, 0.5); }
.footer-legal {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-legal p { font-size: 12.5px; color: rgba(29, 29, 31, 0.5); }

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
  .sol-grid { perspective: none; }
  .sol-7, .sol-6, .sol-5 { grid-column: span 6; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .tile-a, .tile-b, .tile-e, .tile-f { grid-column: span 2; }
  .tile-c, .tile-d { grid-column: span 1; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .timeline-steps { grid-template-columns: repeat(2, 1fr); row-gap: 36px; }
  .timeline-track { display: none; }
  .clients-split { grid-template-columns: 1fr; }
  .clients-head { position: static; }
  .method-row { grid-template-columns: 80px 1fr; }
  .method-row p { grid-column: 2; }
  .engage-row { grid-template-columns: 64px 1fr; }
  .engage-row p { grid-column: 2; }
}

@media (max-width: 768px) {
  .nav-links, .nav .nav-cta { display: none; }
  .nav-burger { display: flex; }
  .hero { padding-bottom: 72px; }
  .arch-layer { grid-template-columns: 1fr; gap: 18px; padding: 30px 26px; }
  .arch-tags { justify-content: flex-start; }
  .arch-governance p { margin-left: 0; }
  .first-call ul { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .sol-grid { grid-template-columns: 1fr; }
  .sol-7, .sol-6, .sol-5 { grid-column: span 1; }
  .bento { grid-template-columns: 1fr; }
  .tile-a, .tile-b, .tile-c, .tile-d, .tile-e, .tile-f { grid-column: span 1; }
  .hero-actions { flex-direction: column; gap: 18px; }
  .hero-eyebrow { font-size: 12px; letter-spacing: 0.2em; padding-left: 0.2em; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .timeline-steps { grid-template-columns: 1fr; }
  .t-step { padding-top: 0; padding-left: 34px; }
  .t-dot { top: 6px; }
  .method-row, .engage-row { grid-template-columns: 1fr; gap: 10px; }
  .method-row p, .engage-row p { grid-column: 1; }
  .method-num { font-size: 34px; }
  .faq-item summary { padding: 18px 20px; font-size: 15.5px; }
  .faq-body { padding: 0 20px; }
  .client-row { flex-direction: column; gap: 14px; padding: 28px 0; }
}

/* ===================== 动效降级 ===================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
  #heroCanvas { display: none; }
  body.js:not(.loaded) .hero-content > * { opacity: 1; }
}

/* ===================== 影像带（全幅摄影 + 视差） ===================== */
.image-band {
  position: relative;
  min-height: clamp(420px, 72vh, 720px);
  overflow: hidden;
  display: grid;
  place-items: center;
  isolation: isolate;
  background: var(--bg-black);
}
.band-media { position: absolute; inset: 0; }
.band-media img {
  width: 100%;
  height: 120%;
  object-fit: cover;
  transform: translateY(-5%);
}
@supports (animation-timeline: view()) {
  .band-media img {
    height: 128%;
    animation: bandPan linear both;
    animation-timeline: view();
    animation-range: entry 0% exit 100%;
  }
  @keyframes bandPan {
    from { transform: translateY(-7%) scale(1.02); }
    to   { transform: translateY(0%) scale(1.06); }
  }
}
.band-tint {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, var(--bg-black) 0%, rgba(10, 10, 14, 0) 26%, rgba(10, 10, 14, 0) 62%, var(--bg-black) 100%),
    linear-gradient(115deg, rgba(7, 12, 28, 0.82), rgba(7, 12, 28, 0.38) 60%, rgba(7, 12, 28, 0.6));
}
.band-tint::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 70, 170, 0.22);
  mix-blend-mode: color;
}
.band-copy {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 24px;
  color: #f5f5f7;
}
.band-kicker {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.3em;
  padding-left: 0.3em;
  color: rgba(245, 245, 247, 0.66);
  margin-bottom: 22px;
}
.band-statement {
  font-size: clamp(30px, 5.4vw, 60px);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.16;
  text-wrap: balance;
  text-shadow: 0 2px 40px rgba(0, 0, 0, 0.45);
}

/* ===================== 关于区照片卡 ===================== */
.about-side { display: flex; flex-direction: column; gap: 22px; }
.about-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 16 / 10;
  isolation: isolate;
}
.about-visual img { width: 100%; height: 100%; object-fit: cover; }
.about-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 70, 170, 0.2);
  mix-blend-mode: color;
}
.about-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(160deg, rgba(4, 10, 26, 0.3), rgba(4, 10, 26, 0.08) 50%, rgba(6, 8, 13, 0.42));
  pointer-events: none;
}

/* ===================== 聚光灯边框（指针位置驱动） ===================== */
.sol-card::after, .bento-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  background: radial-gradient(460px circle at var(--mx, 50%) var(--my, 50%), var(--spot, rgba(0, 114, 227, 0.1)), transparent 55%);
}
.sol-card:hover::after, .bento-tile:hover::after { opacity: 1; }
.sol-card { --spot: rgba(0, 114, 227, 0.09); }
.bento-tile { --spot: rgba(0, 102, 204, 0.07); }

/* ===================== 排版细节 ===================== */
.section-title, .hero-sub { text-wrap: balance; }
.cta-inner h2 { text-wrap: balance; }

/* ===================== Hero 滚动视差（仅支持的浏览器） ===================== */
@supports (animation-timeline: scroll()) {
  .hero-content {
    animation: heroPar linear both;
    animation-timeline: scroll(root);
    animation-range: 0 92vh;
  }
  @keyframes heroPar {
    to { transform: translateY(-72px); opacity: 0.15; }
  }
}

/* ===================== 标题光束扫过（加载后一次性） ===================== */
.hero-title { position: relative; }
body.loaded .hero-title::after {
  content: "";
  position: absolute;
  inset: -12% -35%;
  background: linear-gradient(105deg, transparent 42%, rgba(0, 114, 227, 0.1) 50%, transparent 58%);
  transform: translateX(-135%) skewX(-8deg);
  animation: titleSweep 1.5s cubic-bezier(0.4, 0, 0.2, 1) 1.2s both;
  pointer-events: none;
}
@keyframes titleSweep { to { transform: translateX(135%) skewX(-8deg); } }

/* ===================== 按钮入点涟漪填充 ===================== */
.btn-primary, .nav-cta {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.btn-primary::before, .nav-cta::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: var(--fx, 50%);
  top: var(--fy, 50%);
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--blue-hover);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.55s var(--ease);
}
.btn-primary:hover::before, .nav-cta:hover::before { transform: translate(-50%, -50%) scale(1); }

/* ===================== 影像带宣言逐行升起 ===================== */
.band-line { display: block; overflow: hidden; padding-bottom: 0.09em; margin-bottom: -0.09em; }
.band-line-in { display: inline-block; }
body.js .band-line-in { transform: translateY(118%); }
.band-statement.in .band-line-in { animation: lineRise 1s var(--ease) both; }
.band-statement.in .band-line:nth-child(2) .band-line-in { animation-delay: 0.12s; }
@keyframes lineRise { to { transform: translateY(0); } }

/* ===================== CTA 幽灵字（描边水印） ===================== */
.cta-ghost {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(200px, 36vw, 480px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 0, 0, 0.05);
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
  overflow: hidden;
}
@supports (animation-timeline: view()) {
  .cta-ghost {
    animation: ghostDrift linear both;
    animation-timeline: view();
    animation-range: entry 0% exit 100%;
  }
  @keyframes ghostDrift {
    from { transform: translateY(70px); }
    to   { transform: translateY(-70px); }
  }
}

/* ===================== 条目行悬停亮面 ===================== */
.method-row, .engage-row, .client-row { position: relative; }
.method-row::before, .engage-row::before, .client-row::before {
  content: "";
  position: absolute;
  inset: 10px -22px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.85);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.method-row:hover::before, .engage-row:hover::before, .client-row:hover::before { opacity: 1; }

/* ===================== 时间轴圆点呼吸 ===================== */
.t-step.done .t-dot { animation: dotGlow 2.2s ease-in-out infinite; }
@keyframes dotGlow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 150, 255, 0.55); }
  50%      { box-shadow: 0 0 24px rgba(0, 150, 255, 0.95); }
}

/* ===================== 回到顶部 ===================== */
.to-top {
  font-size: 12.5px;
  color: rgba(29, 29, 31, 0.55);
  transition: color 0.25s ease;
  white-space: nowrap;
}
.to-top:hover { color: var(--ink); }
.to-top span { display: inline-block; transition: transform 0.3s var(--ease); }
.to-top:hover span { transform: translateY(-2px); }

/* ===================== 降级修正 ===================== */
@media (prefers-reduced-motion: reduce) {
  body.js .band-line-in { transform: none; }
}

/* ============================================================
   审计修复轮（adversarial audit pass）
   ============================================================ */

/* 单一强调色统一加深：修复浅底蓝字 4.31:1 与 hover 白字 4.32:1 */
:root {
  --blue: #0066cc;
  --blue-hover: #0072dd;
}

/* 按钮基础尺寸：无 .btn-lg 修饰时也保持胶囊完整 */
.btn { padding: 12px 26px; font-size: 15px; }
.btn-lg { padding: 16px 32px; font-size: 17px; }

/* 常驻投影改为上移收窄的蓝染阴影（白底区块不再出现"下划线"观感） */
.btn-primary { box-shadow: 0 10px 28px -10px rgba(0, 80, 170, 0.45); }
.btn-primary:hover { box-shadow: 0 12px 32px -10px rgba(0, 80, 170, 0.55); }

/* 浅色区块卡片阴影染蓝（禁纯黑投影） */
.sol-card:hover { box-shadow: 0 28px 56px -18px rgba(15, 30, 60, 0.16); }
.arch-layer:hover { box-shadow: 0 22px 44px -20px rgba(15, 30, 60, 0.18); }

/* 架构层编号徽章：白字对比度 2.0 → ≥4.5 */
.arch-no { background: linear-gradient(135deg, #0066d2, #0053bd); }

/* 时间轴：进度线与圆点圆心对齐（38px），不支持 view() 时基态归零 */
.timeline-track { top: 37px; }
.timeline-track span { transform: scaleX(0); }
.t-dot { transition: border-color 0.4s ease, box-shadow 0.4s ease; }

/* 对比度：页脚法务行 / 地址 / 跑马灯 / 影像带 kicker */
.footer-legal p { color: rgba(29, 29, 31, 0.52); }
.footer-addr { color: rgba(29, 29, 31, 0.55); }
.mq { color: rgba(29, 29, 31, 0.55); }
.band-kicker {
  color: rgba(245, 245, 247, 0.82);
  font-size: 13.5px;
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.6);
}
.band-statement { text-shadow: 0 2px 60px rgba(0, 0, 0, 0.6); }
.band-tint {
  background:
    linear-gradient(180deg, var(--bg-black) 0%, rgba(10, 10, 14, 0) 26%, rgba(10, 10, 14, 0) 62%, var(--bg-black) 100%),
    linear-gradient(115deg, rgba(7, 12, 28, 0.88), rgba(7, 12, 28, 0.55) 60%, rgba(7, 12, 28, 0.72));
}

/* 色彩锁：绿色对勾/圆点归入蓝色系 */
.check-svg { color: var(--grad-a); }
.check-halo { border-color: rgba(0, 198, 255, 0.35); }
.doc-check { border-color: rgba(0, 198, 255, 0.5); }
.doc-check::after { border-color: var(--grad-a); }
@keyframes dotGlow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 150, 255, 0.5); }
  50%      { box-shadow: 0 0 18px rgba(0, 150, 255, 0.75); }
}

/* 运维卡内容补衡 */
.ops-pills { display: flex; gap: 8px; margin-top: 26px; }
.ops-pills span {
  font-size: 13px;
  font-weight: 500;
  color: rgba(29, 29, 31, 0.75);
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 980px;
  padding: 7px 16px;
  white-space: nowrap;
}
.uptime { padding-top: 18px; }

/* 进度条可见性 + 焦点暂停跑马灯 */
.nav-progress { height: 3px; }
.marquee:focus-within .marquee-track { animation-play-state: paused; }
.marquee:focus { outline: 1px solid rgba(0, 102, 204, 0.4); outline-offset: -1px; }

/* Hero：顶部留白回帽、字号回纪律、高亮条更干净 */
.hero { padding-top: calc(var(--nav-h) + 32px); }
.hero-title { font-size: clamp(44px, 8vw, 84px); }
.hero-sub .hl { background: linear-gradient(transparent 74%, rgba(0, 114, 227, 0.45) 74%); }

/* 汉堡图标存在感 */
.nav-burger span { width: 20px; }

/* 架构连接线：加粗加大箭头 */
.arch-connector { width: 3px; }
.arch-connector::after { width: 10px; height: 10px; border-width: 3px; bottom: -4px; }

/* footer 列标题（h4 → p）样式平移 */
.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 6px;
}
.footer-col { gap: 12px; }

/* reveal 常驻 will-change 移除（层爆炸风险） */
.reveal { will-change: auto; }

/* 触屏 sticky-hover：关闭聚光灯叠层 */
@media (hover: none) {
  .sol-card::after, .bento-tile::after { display: none; }
}

/* 小屏轨道场景收窄 */
@media (max-width: 620px) {
  .orbit-scene { width: 185px; height: 185px; margin-bottom: 28px; }
}

/* forced-colors：渐变裁切文字回退 */
@media (forced-colors: active) {
  .grad-text, .grad-shimmer {
    -webkit-text-fill-color: CanvasText;
    color: CanvasText;
    background: none;
    animation: none;
  }
  .grad-shimmer { background-size: auto; }
}

/* reduced-motion 补漏：滚动驱动动画一并停用；no-JS 时 preloader 不挡内容 */
@media (prefers-reduced-motion: reduce) {
  .nav-progress span,
  .timeline-track span,
  .band-media img,
  .cta-ghost,
  .hero-content { animation: none !important; transform: none; }
  .preloader { display: none; }
}


/* ============================================================
   细节精修轮（detail polish pass）
   ============================================================ */

/* 聚光灯升级：光斑沿卡片边缘流走（border-only mask） */
.sol-card::after, .bento-tile::after {
  padding: 1.5px;
  background: radial-gradient(380px circle at var(--mx, 50%) var(--my, 50%), rgba(0, 102, 204, 0.65), transparent 65%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
}

/* 图标入场自描绘 */
.sol-card.visible .sol-icon svg [pathLength] { animation: drawStroke 0.9s cubic-bezier(0.65, 0, 0.35, 1) both; }
.sol-card.visible .sol-icon svg *:nth-child(2) { animation-delay: 0.1s; }
.sol-card.visible .sol-icon svg *:nth-child(3) { animation-delay: 0.2s; }
.sol-card.visible .sol-icon svg *:nth-child(4) { animation-delay: 0.3s; }
.sol-card.visible .sol-icon svg *:nth-child(5) { animation-delay: 0.4s; }
.sol-card.visible .sol-icon svg *:nth-child(6) { animation-delay: 0.5s; }
.sol-card.visible .sol-icon svg *:nth-child(7) { animation-delay: 0.6s; }
.sol-card.visible .sol-icon svg *:nth-child(8) { animation-delay: 0.7s; }

/* 架构连接线生长 */
.arch-connector.visible { animation: drawY 0.7s var(--ease) 0.15s both; }
@keyframes drawY { from { transform: scaleY(0); } to { transform: scaleY(1); } }

/* 第一次沟通：勾选逐个弹入 */
.first-call li::before {
  opacity: 0;
  transform: rotate(-45deg) scale(0.3);
  transition: opacity 0.35s ease, transform 0.45s var(--ease);
}
.first-call.visible li::before { opacity: 1; transform: rotate(-45deg) scale(1); }
.first-call.visible li:nth-child(1)::before { transition-delay: 0.25s; }
.first-call.visible li:nth-child(2)::before { transition-delay: 0.37s; }
.first-call.visible li:nth-child(3)::before { transition-delay: 0.49s; }
.first-call.visible li:nth-child(4)::before { transition-delay: 0.61s; }

/* FAQ 平滑展开（渐进增强，Chrome 129+） */
@supports (interpolate-size: allow-keywords) {
  :root { interpolate-size: allow-keywords; }
  .faq-item::details-content {
    block-size: 0;
    overflow: hidden;
    transition: block-size 0.45s var(--ease), content-visibility 0.45s allow-discrete;
  }
  .faq-item[open]::details-content { block-size: auto; }
}

/* 照片 Ken Burns */
@media (prefers-reduced-motion: no-preference) {
  .about-visual img { animation: kenburns 24s ease-in-out infinite alternate; }
}
@keyframes kenburns {
  from { transform: scale(1); }
  to   { transform: scale(1.07) translate(1.5%, -1.5%); }
}

/* 时间轴完成态：标题点亮 */
.t-step h3 { transition: color 0.4s ease; }
.t-step.done h3 { color: var(--blue); }

/* 服务对象左栏补充句 */
.clients-note {
  margin-top: 24px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text-gray);
  max-width: 30ch;
}

/* 标题模糊聚焦入场 */
@media (prefers-reduced-motion: no-preference) {
  .section-title.reveal { filter: blur(10px); }
  .section-title.reveal {
    transition: opacity 0.9s var(--ease), transform 0.9s var(--ease), filter 1.2s var(--ease);
    transition-delay: var(--d, 0s);
  }
  .section-title.reveal.visible { filter: blur(0); }
}

/* 下方区块渲染优化 */
#capabilities, #process, #about, #faq, #clients, #engage {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

/* 导航透明度降级 */
@media (prefers-reduced-transparency: reduce) {
  .nav { background: rgba(255, 255, 255, 0.98); backdrop-filter: none; -webkit-backdrop-filter: none; }
  .nav-drawer { background: #fff; }
  .about-card { backdrop-filter: none; -webkit-backdrop-filter: none; }
}

/* Logo 悬停微动 */
.nav-logo .logo-mark { transition: transform 0.4s var(--ease); }
.nav-logo:hover .logo-mark { transform: rotate(-10deg) scale(1.08); }


/* ============================================================
   美化细节轮（beauty detail pass）
   ============================================================ */

/* 图标芯片：iOS 风格圆角容器 */
.sol-icon, .client-icon {
  width: 48px;
  height: 48px;
  padding: 11px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 114, 255, 0.11), rgba(0, 102, 204, 0.05));
  border: 1px solid rgba(0, 102, 204, 0.16);
  box-sizing: border-box;
}
.sol-head { gap: 14px; }
.sol-icon { width: 46px; height: 46px; padding: 10px; }

/* 「了解詳情」下划线滑动 */
.sol-more {
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1.5px;
  transition: background-size 0.4s var(--ease);
  padding-bottom: 2px;
}
.sol-card:hover .sol-more { background-size: 100% 1.5px; }

/* Hero 副标题逐行入场 */
.sub-line { display: block; }
body.loaded .hero-sub { animation: none; }
body.loaded .hero-sub .sub-line { animation: heroUp 0.9s var(--ease) both; }
body.loaded .hero-sub .sub-line:nth-child(2) { animation-delay: 0.54s; }

/* 架构条：左侧蓝条生长 */
.arch-layer { position: relative; }
.arch-layer::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--grad-a), var(--blue));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.45s var(--ease);
}
.arch-layer:hover::before { transform: scaleY(1); }

/* 页脚链接：悬停右移 */
.footer-col a { transition: color 0.25s ease, transform 0.3s var(--ease); }
.footer-col a:hover { transform: translateX(3px); }

/* Bento 勾选弹入（与清单行错峰同步） */
.doc-check {
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.3s ease, transform 0.45s var(--ease);
}
.bento-tile.tile-e.visible li:nth-child(1) .doc-check { opacity: 1; transform: scale(1); transition-delay: 0.3s; }
.bento-tile.tile-e.visible li:nth-child(2) .doc-check { opacity: 1; transform: scale(1); transition-delay: 0.45s; }
.bento-tile.tile-e.visible li:nth-child(3) .doc-check { opacity: 1; transform: scale(1); transition-delay: 0.6s; }
.bento-tile.tile-e.visible li:nth-child(4) .doc-check { opacity: 1; transform: scale(1); transition-delay: 0.75s; }

/* FAQ 悬浮微抬 */
.faq-item {
  transition: box-shadow 0.35s ease, border-color 0.35s ease, transform 0.35s var(--ease);
}
.faq-item:hover { transform: translateY(-2px); }

/* 段落断行优化（渐进增强） */
.section-lead, .sol-card > p, .client-row p, .about-text, .engage-row p { text-wrap: pretty; }

/* 方法论行悬停：幽灵数字浮现度提高 */
.method-row .method-num { transition: opacity 0.4s ease; opacity: 0.85; }
.method-row:hover .method-num { opacity: 1; }


/* ============================================================
   观感跃升轮（depth & texture pass）
   ============================================================ */

/* Hero：指针视差（JS 写入 --px/--py） */
.hero-grid {
  transform: translate3d(calc(var(--px, 0) * 14px), calc(var(--py, 0) * 10px), 0);
  transition: transform 0.25s ease-out;
  will-change: transform;
}
#heroCanvas {
  transform: translate3d(calc(var(--px, 0) * -9px), calc(var(--py, 0) * -7px), 0);
  transition: transform 0.25s ease-out;
}

/* 标题字号升级 */
.hero-title {
  font-size: clamp(42px, 9vw, 100px);
  letter-spacing: -0.028em;
}

/* 多层真实阴影（静态 + 悬浮） */
.sol-card, .bento-tile, .client-card, .faq-item, .about-card, .first-call-inner {
  box-shadow:
    0 1px 2px rgba(16, 24, 40, 0.03),
    0 16px 40px -24px rgba(15, 30, 60, 0.1);
}
.sol-card:hover, .client-card:hover {
  box-shadow:
    0 1px 2px rgba(16, 24, 40, 0.04),
    0 12px 24px -12px rgba(15, 30, 60, 0.12),
    0 36px 72px -28px rgba(15, 30, 60, 0.2);
}
.bento-tile:hover {
  box-shadow:
    0 1px 2px rgba(16, 24, 40, 0.04),
    0 12px 24px -12px rgba(15, 30, 60, 0.1),
    0 36px 72px -28px rgba(15, 30, 60, 0.16);
}

/* 卡片缩放入场（配合上浮 + 标题聚焦） */
.reveal { transform: translateY(30px) scale(0.985); }
.reveal.visible { transform: translateY(0) scale(1); }

/* 图标芯片悬停浮起 + 投影 */
.sol-icon, .client-icon {
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.sol-card:hover .sol-icon, .client-card:hover .client-icon {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 10px 22px -10px rgba(0, 102, 204, 0.4);
}

/* 全局胶片颗粒（无混合模式，静态安全） */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}


/* ============================================================
   简洁精修轮（refinement pass）—— 少即是多
   ============================================================ */

/* 悬浮胶囊导航 */
.nav {
  top: 14px;
  left: 50%;
  right: auto;
  transform: translateX(-50%);
  width: min(1060px, calc(100% - 32px));
  border-radius: 980px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow:
    0 1px 2px rgba(16, 24, 40, 0.04),
    0 12px 40px -16px rgba(15, 30, 60, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}
.nav.scrolled {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.6) 40%, rgba(255, 255, 255, 0.72)),
    rgba(255, 255, 255, 0.82);
}
.nav-progress { display: none; }
.nav-inner { width: 100%; padding-inline: 10px; gap: 24px; }
.nav-drawer {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  border-radius: 24px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 24px 60px -20px rgba(15, 30, 60, 0.28);
}
@media (max-width: 768px) {
  .nav { top: 10px; }
  .nav-drawer { top: calc(100% + 8px); }
}

/* 移除跑马灯 */
.marquee { display: none; }

/* 留白与标题节奏 */
.section { padding: clamp(110px, 14vw, 170px) 0; }
.section-title { font-size: clamp(36px, 5.6vw, 60px); }
.section-lead { max-width: 560px; line-height: 1.75; }
.section-head { margin-bottom: clamp(48px, 7vw, 76px); }

/* 影像带：内嵌圆角电影卡 */
.image-band {
  width: min(1200px, calc(100% - 32px));
  height: clamp(420px, 66vh, 640px);
  margin-inline: auto;
  border-radius: 32px;
  box-shadow: 0 40px 90px -40px rgba(15, 30, 60, 0.35);
}
.band-statement { font-size: clamp(28px, 4.6vw, 54px); }

/* 解决方案卡：去 CTA 后的呼吸感 */
.sol-card { padding-bottom: 36px; }
.sol-card > p { margin-bottom: 8px; }

/* 颗粒再收敛 */
body::after { opacity: 0.014; }

/* FAQ 去悬浮位移（更安静） */
.faq-item:hover { transform: none; }

/* Hero 副标题排版 */
.hero-sub { max-width: 34em; margin-inline: auto; }

/* ============================================================
   合并轮：交付保障迷你卡（并入解决方案区块）
   ============================================================ */
.cap-block { margin-top: 56px; padding-top: 52px; border-top: 1px solid rgba(0, 0, 0, 0.07); }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap-tile {
  background: #f6f9fe;
  border-radius: 18px;
  padding: 26px 24px;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.cap-tile:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px -16px rgba(15, 30, 60, 0.16);
}
.cap-icon {
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 114, 255, 0.11), rgba(0, 102, 204, 0.05));
  border: 1px solid rgba(0, 102, 204, 0.16);
  color: var(--blue);
}
.cap-icon svg { width: 100%; height: 100%; }
.cap-icon svg * {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.cap-tile h4 {
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 16px 0 6px;
  color: var(--ink);
}
.cap-tile p { font-size: 14px; line-height: 1.65; color: var(--text-gray); }
@media (max-width: 1024px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) {
  .cap-grid { grid-template-columns: 1fr; }
  .cap-tile { padding: 22px 20px; }
}

/* 图标稳健渲染：弃用 dasharray 描绘（部分渲染器 pathLength 归一化失效），图标实线常显 */
.sol-icon svg [pathLength] {
  stroke-dasharray: none !important;
  stroke-dashoffset: 0 !important;
  animation: none !important;
}
.sol-card:hover .sol-icon svg [pathLength] { animation: none !important; }

/* 交付保障卡：去符号，改为标题上方的渐变短线点缀 */
.cap-icon { display: none; }
.cap-tile h4 { margin-top: 0; }
.cap-tile::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--grad-a), var(--blue));
  margin-bottom: 16px;
}

/* ============================================================
   重点突出轮：双旗舰（AI + IT）+ 四支撑
   ============================================================ */
.sol-top { display: grid; grid-template-columns: 7fr 5fr; gap: 18px; margin-bottom: 18px; }
.sol-feat { padding: 40px 38px 36px; }
.sol-feat .sol-head { margin-bottom: 16px; }
.sol-feat .sol-head h3 { font-size: 25px; }
.sol-feat p { font-size: 16px; }
.sol-feat .sol-icon { width: 52px; height: 52px; padding: 11px; border-radius: 15px; }
.sol-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.sol-tags span {
  font-size: 12.5px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 980px;
  background: rgba(0, 102, 204, 0.06);
  border: 1px solid rgba(0, 102, 204, 0.16);
  color: #14508f;
  white-space: nowrap;
}
.sol-feat-ai .sol-tags span {
  background: rgba(0, 198, 255, 0.09);
  border-color: rgba(0, 198, 255, 0.3);
  color: #c9ecff;
}
.sol-feat-ai:hover { box-shadow: 0 36px 72px -28px rgba(0, 114, 227, 0.45); }
.sol-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.sol-mini { padding: 28px 26px; }
.sol-mini .sol-icon { width: 40px; height: 40px; padding: 9px; border-radius: 12px; }
.sol-mini h3 { font-size: 17px; }
.sol-mini p { font-size: 14px; }
@media (max-width: 1024px) {
  .sol-top { grid-template-columns: 1fr; }
  .sol-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .sol-row { grid-template-columns: 1fr; }
  .sol-feat { padding: 30px 26px; }
}


/* ============================================================
   10-Agent 审计修复轮
   ============================================================ */

/* 对比度：页脚小字 / 回到顶部（3.4-3.7:1 → ≥4.9:1） */
.footer-legal p { color: rgba(29, 29, 31, 0.75); }
.footer-addr { color: rgba(29, 29, 31, 0.75); }
.to-top { color: rgba(29, 29, 31, 0.75); }

/* FAQ 焦点环内嵌（不被 overflow 裁剪） */
.faq-item summary:focus-visible { outline-offset: -3px; }

/* CTA 渐变末端调浅（4.46:1 → ≥4.66:1）+ 正文加深 */
.cta { background: linear-gradient(180deg, #ffffff, #eef4fd); }
.cta-inner > p, .cta-alt { color: #5d5d63; }

/* 滚动偏移与胶囊导航对齐 */
html { scroll-padding-top: 104px; }

/* 页脚法务分隔线：浅色主题残留修复 */
.footer-legal { border-top: 1px solid rgba(0, 0, 0, 0.08); }

/* 旗舰/支撑卡 3D 透视恢复 */
.sol-top, .sol-row { perspective: 1200px; }

/* 交付保障卡等高 */
.cap-grid { grid-auto-rows: 1fr; }

/* 字体栈：繁体优先（zh-Hant-HK 字形正确性） */
:root {
  --font: -apple-system, BlinkMacSystemFont, "PingFang HK", "PingFang TC",
          "PingFang SC", "Noto Sans CJK TC", "Noto Sans CJK SC",
          "Helvetica Neue", Arial, sans-serif;
}

/* forced-colors 补漏 */
@media (forced-colors: active) {
  .method-num { -webkit-text-fill-color: CanvasText; color: CanvasText; background: none; }
  .cta-ghost { display: none; }
}

/* 页脚触控目标 */
.footer-col a, .to-top { padding: 4px 0; }

/* Hero 客群徽章 */
.hero-badge {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #14508f;
  background: rgba(0, 102, 204, 0.07);
  border: 1px solid rgba(0, 102, 204, 0.18);
  border-radius: 980px;
  padding: 7px 18px;
  margin-bottom: 28px;
}
body.loaded .hero-badge { animation: heroUp 0.9s var(--ease) 0.02s both; }

/* 信任要素条 */
.trust-strip {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
  position: relative;
  z-index: 1;
}
.trust-strip span {
  font-size: 13.5px;
  font-weight: 500;
  color: #14508f;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(0, 102, 204, 0.16);
  padding: 8px 18px;
  border-radius: 980px;
}

/* 复制邮箱按钮 */
.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 30px;
  border-radius: 980px;
  border: 1px solid rgba(0, 102, 204, 0.35);
  background: rgba(255, 255, 255, 0.85);
  color: var(--blue);
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s ease;
}
.copy-btn:hover { border-color: var(--blue); background: #fff; }
.copy-btn:active { transform: scale(0.98); }

/* ============================================================
   蔚蓝式 Hero 板块（公告条 / 玻璃装饰 / 下划线标题 / 标签行 / 大图卡）
   ============================================================ */

/* 玻璃装饰 */
.orn { position: absolute; pointer-events: none; }
.orn-l { left: -70px; top: 90px; width: 400px; height: 400px; }
.orn-r { right: -90px; top: 40px; width: 470px; height: 470px; }
@media (max-width: 1100px) { .orn { display: none; } }

/* 下划线强调关键词 */
.u-key { position: relative; display: inline-block; }
.u-svg {
  position: absolute;
  left: -1%;
  bottom: -6px;
  width: 102%;
  height: 16px;
  overflow: visible;
}
.u-svg path {
  fill: none;
  stroke: rgba(0, 83, 189, 0.5);
  stroke-width: 7;
  stroke-linecap: round;
  stroke-dasharray: 320;
  stroke-dashoffset: 320;
  animation: drawU 1.1s cubic-bezier(0.65, 0, 0.35, 1) 1.5s forwards;
}
@keyframes drawU { to { stroke-dashoffset: 0; } }

/* 标签胶囊行 */
.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 34px;
}
.hero-tags span {
  font-size: 13px;
  font-weight: 500;
  color: #14508f;
  background: rgba(0, 102, 204, 0.06);
  border: 1px solid rgba(0, 102, 204, 0.16);
  padding: 7px 16px;
  border-radius: 980px;
  white-space: nowrap;
}

/* 深色药丸主 CTA + 白色胶囊副 CTA */
.btn-dark-pill {
  background: var(--heading);
  color: #fff;
  box-shadow: 0 12px 30px -12px rgba(22, 48, 94, 0.55);
}
.btn-dark-pill:hover { background: #1d3a6e; box-shadow: 0 16px 36px -12px rgba(22, 48, 94, 0.6); }
.btn-ghost-pill {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.12);
  color: var(--ink);
}
.btn-ghost-pill:hover { border-color: rgba(0, 0, 0, 0.3); }
.btn-ghost-pill .arr { font-size: 14px; margin-left: 2px; }

/* reduced-motion：下划线直接画好 */
@media (prefers-reduced-motion: reduce) {
  .u-svg path { animation: none; stroke-dashoffset: 0; }
}


/* ============================================================
   AI LAB 板块（蔚蓝式：玻璃装饰 / 下划线标题 / 标签行 / 作品图）
   ============================================================ */
.ailab { position: relative; overflow: hidden; }
.ailab-inner { position: relative; text-align: center; }
.ailab-orn { position: absolute; pointer-events: none; }
.ailab-orn-l { left: -80px; top: -70px; width: 380px; height: 380px; }
.ailab-orn-r { right: -100px; bottom: -80px; width: 440px; height: 440px; }
@media (max-width: 1100px) { .ailab-orn { display: none; } }
.ailab-badge {
  display: inline-flex;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--blue);
  background: rgba(0, 102, 204, 0.06);
  border: 1px solid rgba(0, 102, 204, 0.2);
  border-radius: 980px;
  padding: 7px 18px;
  margin-bottom: 30px;
}
.ailab-title {
  font-size: clamp(36px, 5.4vw, 58px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--heading);
}
.ailab-sub {
  margin-top: 26px;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-gray);
  line-height: 1.85;
}
.ailab-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 36px;
}
.ailab-figure {
  margin: 64px auto 0;
  max-width: 880px;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 40px 90px -40px rgba(15, 30, 60, 0.35);
}
.ailab-figure img { width: 100%; height: auto; display: block; }
.ailab .u-svg path { stroke: rgba(0, 83, 189, 0.45); }

/* 可交互黑洞画布 */
.bh-figure { position: relative; }
#bhCanvas {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  touch-action: pan-y;
  cursor: grab;
  background: #050508;
}
#bhCanvas:active { cursor: grabbing; }
@supports not (aspect-ratio: 1) { #bhCanvas { height: 400px; } }
.bh-hint {
  position: absolute;
  right: 18px;
  bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(255, 246, 222, 0.55);
  pointer-events: none;
}


/* 氛围音乐选择器 */
.bh-sound {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(8, 10, 18, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 980px;
  padding: 8px 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.bh-sound-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(255, 246, 222, 0.5);
  margin-right: 2px;
}
.snd-chip {
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 246, 222, 0.7);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 980px;
  padding: 5px 13px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.snd-chip:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.snd-chip.on {
  background: rgba(255, 232, 178, 0.16);
  border-color: rgba(255, 232, 178, 0.55);
  color: #ffe9bd;
}
@media (max-width: 620px) {
  .bh-sound { padding: 6px 10px; gap: 6px; top: 12px; right: 12px; }
  .bh-sound-label { display: none; }
  .snd-chip { padding: 4px 11px; font-size: 11px; }
}

/* ===================== 内容细化：交付清单 / 场景例 / 產出物 / LAB 模塊 ===================== */
.sol-deliver { margin: 14px 0 2px; display: grid; gap: 9px; }
.sol-deliver li {
  position: relative;
  padding-left: 22px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-gray);
  list-style: none;
}
.sol-deliver li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  box-shadow: 0 0 8px rgba(0, 140, 255, 0.4);
}
.sol-card-accent .sol-deliver li { color: rgba(245, 245, 247, 0.78); }
.sol-eg {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed rgba(0, 80, 180, 0.16);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}
.t-out {
  display: inline-block;
  margin-top: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: rgba(214, 232, 255, 0.92);
  background: rgba(120, 170, 255, 0.1);
  border: 1px solid rgba(140, 185, 255, 0.22);
}
.lab-modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 36px;
  text-align: left;
}
.lab-card {
  padding: 24px 24px 22px;
  background: #fff;
  border: 1px solid rgba(15, 60, 130, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 36px rgba(16, 42, 84, 0.07);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.lab-card:hover { transform: translateY(-4px); box-shadow: 0 24px 48px rgba(16, 42, 84, 0.11); }
.lab-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.lab-card p { font-size: 13.5px; line-height: 1.7; color: var(--text-gray); }
@media (max-width: 900px) { .lab-modules { grid-template-columns: 1fr; } }