/* =========================================================
   51cg官网 · 企业数字内容制作与传播服务
   全局样式表 / Global Stylesheet
   ========================================================= */

:root {
  --ink: #0e1522;
  --ink-soft: #1a2436;
  --ink-3: #2a3550;
  --body: #3d4759;
  --muted: #6b7587;
  --line: #e4e8f0;
  --bg: #f6f7fa;
  --white: #ffffff;
  --accent: #ff5f3d;
  --accent-2: #ffab2e;
  --teal: #17b8a6;
  --grad: linear-gradient(118deg, #ff5f3d 0%, #ff8a2b 52%, #ffab2e 100%);
  --grad-soft: linear-gradient(118deg, rgba(255, 95, 61, .12), rgba(255, 171, 46, .12));
  --shadow-sm: 0 6px 18px rgba(16, 23, 36, .06);
  --shadow-md: 0 18px 44px rgba(16, 23, 36, .10);
  --shadow-lg: 0 32px 80px rgba(16, 23, 36, .16);
  --radius: 20px;
  --radius-sm: 12px;
  --container: 1180px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.78;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 700; line-height: 1.3; letter-spacing: -.4px; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
button { font-family: inherit; }
figure { margin: 0; }

::selection { background: rgba(255, 95, 61, .22); color: var(--ink); }

:focus-visible {
  outline: 3px solid rgba(255, 95, 61, .55);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 999;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  transition: top .25s ease;
}
.skip-link:focus { top: 16px; }

/* ============================ 导航 ============================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(228, 232, 240, .9);
  transition: box-shadow .3s ease, background .3s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(16, 23, 36, .08);
  background: rgba(255, 255, 255, .95);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  color: var(--ink);
  font-size: 19px;
  letter-spacing: -.5px;
  white-space: nowrap;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -1px;
  box-shadow: 0 8px 20px rgba(255, 95, 61, .32);
}
.brand-text small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 2px;
  line-height: 1.2;
  margin-top: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 3px;
}
.nav-links a {
  position: relative;
  display: inline-block;
  padding: 9px 15px;
  border-radius: 10px;
  font-size: 15px;
  color: #48536a;
  transition: color .25s ease, background .25s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transform: translateX(-50%);
  transition: width .28s ease;
}
.nav-links a:hover { color: var(--ink); background: rgba(255, 95, 61, .06); }
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after { width: 18px; }
.nav-links a[aria-current="page"] { color: var(--ink); font-weight: 700; }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  place-items: center;
}
.nav-toggle span {
  display: block;
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: background .2s ease;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .28s ease, top .28s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* ============================ 按钮 ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .2px;
  cursor: pointer;
  transition: transform .28s ease, box-shadow .28s ease, background .28s ease, color .28s ease, border-color .28s ease;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 12px 28px rgba(255, 95, 61, .30);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 38px rgba(255, 95, 61, .40);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: #d8dde7;
}
.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
  transform: translateY(-3px);
}
.btn-light {
  background: rgba(255, 255, 255, .10);
  border-color: rgba(255, 255, 255, .34);
  color: #fff;
}
.btn-light:hover {
  background: #fff;
  color: var(--ink);
  transform: translateY(-3px);
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-block { width: 100%; }
.btn .arrow { transition: transform .28s ease; }
.btn:hover .arrow { transform: translateX(4px); }

/* ============================ 通用区块 ============================ */
.section { padding: 100px 0; position: relative; }
.section-alt { background: #fff; }
.section-dark {
  background: var(--ink);
  color: rgba(255, 255, 255, .72);
}
.section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }

.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}
.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: rgba(255, 95, 61, .10);
  color: #d9482c;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.section-dark .eyebrow {
  background: rgba(255, 171, 46, .16);
  color: #ffc46a;
}
.section-head h2 {
  font-size: clamp(27px, 3.4vw, 40px);
  margin-bottom: 16px;
}
.section-head p {
  font-size: 16.5px;
  color: var(--muted);
  margin: 0;
}
.section-dark .section-head p { color: rgba(255, 255, 255, .66); }

/* ============================ Hero ============================ */
.hero {
  position: relative;
  padding: 92px 0 104px;
  background: #0d1320;
  color: rgba(255, 255, 255, .76);
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(680px 420px at 12% 8%, rgba(255, 95, 61, .26), transparent 62%),
    radial-gradient(560px 460px at 88% 18%, rgba(255, 171, 46, .20), transparent 65%),
    radial-gradient(620px 520px at 72% 96%, rgba(23, 184, 166, .16), transparent 68%);
  z-index: -2;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  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: 64px 64px;
  mask-image: radial-gradient(circle at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 20%, transparent 78%);
  z-index: -1;
  opacity: .8;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 62px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .14);
  font-size: 13px;
  color: rgba(255, 255, 255, .78);
  margin-bottom: 24px;
}
.hero-badge b {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
  font-size: 11.5px;
  letter-spacing: .6px;
}
.hero h1 {
  font-size: clamp(32px, 4.6vw, 58px);
  color: #fff;
  line-height: 1.18;
  letter-spacing: -1.2px;
  margin-bottom: 22px;
}
.hero h1 .grad {
  background: linear-gradient(100deg, #ffb03a, #ff7a45 60%, #ff5f3d);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: 17px;
  color: rgba(255, 255, 255, .70);
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 46px; }
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.hero-metrics .num {
  display: block;
  font-size: 30px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
  line-height: 1.1;
}
.hero-metrics .num i { font-style: normal; color: var(--accent-2); font-size: 18px; }
.hero-metrics .lab {
  font-size: 13px;
  color: rgba(255, 255, 255, .52);
}

.hero-visual { position: relative; }
.hero-visual .frame {
  position: relative;
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow: 0 40px 90px rgba(0, 0, 0, .45);
}
.hero-visual .frame img {
  width: 100%;
  aspect-ratio: 4 / 4.6;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 1.1s ease;
}
.hero-visual:hover .frame img { transform: scale(1.06); }
.hero-float {
  position: absolute;
  border-radius: 16px;
  background: rgba(18, 25, 38, .86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow: 0 20px 40px rgba(0, 0, 0, .35);
  padding: 16px 18px;
  animation: floatY 6s ease-in-out infinite;
}
.hero-float.one { left: -26px; top: 44px; }
.hero-float.two { right: -22px; bottom: 54px; animation-delay: 1.6s; }
.hero-float .k {
  font-size: 12px;
  color: rgba(255, 255, 255, .55);
  letter-spacing: .6px;
}
.hero-float .v {
  font-size: 19px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.4px;
}
.hero-float .v em {
  font-style: normal;
  color: #4be3c9;
  font-size: 13px;
  font-weight: 700;
  margin-left: 6px;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* 子页 Hero */
.page-hero {
  position: relative;
  padding: 74px 0 78px;
  background: #0d1320;
  color: rgba(255, 255, 255, .72);
  overflow: hidden;
  isolation: isolate;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(560px 340px at 10% 0%, rgba(255, 95, 61, .26), transparent 62%),
    radial-gradient(520px 380px at 92% 100%, rgba(255, 171, 46, .18), transparent 66%);
  z-index: -1;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, .48);
  margin-bottom: 22px;
}
.breadcrumb a { color: rgba(255, 255, 255, .68); transition: color .2s ease; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span[aria-current] { color: var(--accent-2); }
.page-hero h1 {
  color: #fff;
  font-size: clamp(30px, 4vw, 46px);
  margin-bottom: 18px;
  letter-spacing: -1px;
}
.page-hero p {
  max-width: 680px;
  color: rgba(255, 255, 255, .68);
  font-size: 16.5px;
  margin-bottom: 0;
}
.page-hero .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.page-hero .hero-tags span {
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .06);
  color: rgba(255, 255, 255, .78);
}

/* ============================ 卡片与特性 ============================ */
.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)); }

.feature-card {
  position: relative;
  padding: 34px 30px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.feature-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 3px;
  width: 0;
  background: var(--grad);
  transition: width .45s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 95, 61, .28);
}
.feature-card:hover::before { width: 100%; }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: var(--grad-soft);
  color: #e05232;
  font-size: 20px;
  font-weight: 900;
  transition: transform .35s ease, background .35s ease, color .35s ease;
}
.feature-card:hover .feature-icon {
  transform: rotate(-6deg) scale(1.05);
  background: var(--grad);
  color: #fff;
}
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 15px; margin: 0; }
.feature-card ul {
  margin-top: 16px;
  display: grid;
  gap: 8px;
}
.feature-card ul li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: #55607a;
}
.feature-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* 服务卡片 */
.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff, #fbfcfe);
  border: 1px solid var(--line);
  transition: transform .35s ease, box-shadow .35s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.service-card .tag {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(23, 184, 166, .12);
  color: #0f9488;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .5px;
}
.service-card h3 { font-size: 20px; }
.service-card p { color: var(--muted); font-size: 15px; margin: 0; }
.service-card .meta {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}
.service-card .link-more {
  color: #d9482c;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.service-card .link-more::after { content: "→"; transition: transform .25s ease; }
.service-card .link-more:hover::after { transform: translateX(4px); }

/* 数据条 */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-radius: var(--radius);
  background: var(--ink);
  color: rgba(255, 255, 255, .7);
  overflow: hidden;
}
.stats-strip > div {
  padding: 34px 26px;
  border-right: 1px solid rgba(255, 255, 255, .08);
}
.stats-strip > div:last-child { border-right: 0; }
.stats-strip .num {
  display: block;
  font-size: 34px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1.2px;
  line-height: 1.1;
}
.stats-strip .num i { font-style: normal; font-size: 17px; color: var(--accent-2); }
.stats-strip .lab { font-size: 13.5px; color: rgba(255, 255, 255, .55); }

/* ============================ 流程 ============================ */
.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}
.process-item {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--line);
  transition: transform .3s ease, box-shadow .3s ease;
}
.process-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.process-item .step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-weight: 900;
  font-size: 15px;
  margin-bottom: 16px;
  box-shadow: 0 10px 22px rgba(255, 95, 61, .28);
}
.process-item h3 { font-size: 17px; margin-bottom: 8px; }
.process-item p { font-size: 14px; color: var(--muted); margin: 0; }

/* ============================ 文章 / 资讯 ============================ */
.post-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform .35s ease, box-shadow .35s ease;
}
.post-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.post-card .thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #dfe3ea;
}
.post-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .7s ease;
}
.post-card:hover .thumb img { transform: scale(1.07); }
.post-card .thumb .cat {
  position: absolute;
  left: 16px;
  top: 16px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(14, 21, 34, .78);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  letter-spacing: .5px;
}
.post-card .body { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card .date { font-size: 12.5px; color: var(--muted); letter-spacing: .5px; }
.post-card h3 { font-size: 18px; line-height: 1.5; }
.post-card p { font-size: 14.5px; color: var(--muted); margin: 0; }
.post-card .read {
  margin-top: auto;
  padding-top: 12px;
  font-size: 14px;
  font-weight: 700;
  color: #d9482c;
}
.post-card .read::after { content: " →"; }
.post-card a.card-link { position: absolute; inset: 0; z-index: 3; }
.post-card { position: relative; }

/* 文章页排版 */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 44px;
  align-items: start;
}
.article-body {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}
.article-body .cover {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 30px;
}
.article-body .cover img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding-bottom: 26px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--muted);
}
.article-meta span::before { content: "· "; color: var(--accent); }
.article-meta span:first-child::before { content: ""; }
.article-body h2 {
  font-size: 24px;
  margin: 38px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
  line-height: 1.4;
}
.article-body h3 { font-size: 18.5px; margin: 26px 0 10px; }
.article-body p { color: #4a5568; font-size: 16px; line-height: 1.95; margin-bottom: 18px; }
.article-body ul { margin: 0 0 20px; display: grid; gap: 10px; }
.article-body ul li {
  position: relative;
  padding-left: 22px;
  color: #4a5568;
  font-size: 15.5px;
}
.article-body ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grad);
}
.article-body blockquote {
  margin: 26px 0;
  padding: 22px 26px;
  border-radius: var(--radius-sm);
  background: var(--grad-soft);
  border-left: 4px solid var(--accent);
  color: #7a4526;
  font-size: 15.5px;
}
.article-body blockquote p { color: inherit; margin: 0; }
.article-body figure { margin: 28px 0; }
.article-body figure img { border-radius: var(--radius-sm); width: 100%; object-fit: cover; }
.article-body figcaption { font-size: 13px; color: var(--muted); text-align: center; margin-top: 10px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--line); }
.article-tags a, .article-tags span {
  padding: 6px 14px;
  border-radius: 999px;
  background: #f3f5f9;
  color: #4f5a6e;
  font-size: 13px;
  transition: background .25s ease, color .25s ease;
}
.article-tags span:hover { background: var(--ink); color: #fff; }

/* 侧边栏 */
.sidebar { display: grid; gap: 24px; position: sticky; top: 96px; }
.side-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
}
.side-card h3 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.side-list { display: grid; gap: 14px; }
.side-list a {
  display: block;
  font-size: 14.5px;
  color: #4a5568;
  line-height: 1.6;
  transition: color .2s ease, transform .2s ease;
}
.side-list a:hover { color: #d9482c; transform: translateX(3px); }
.side-list .s-date { display: block; font-size: 12px; color: #98a1b2; margin-top: 3px; }
.side-cta {
  background: var(--ink);
  color: rgba(255, 255, 255, .7);
  border: 0;
  background-image: radial-gradient(400px 200px at 90% 0%, rgba(255, 95, 61, .34), transparent 70%);
}
.side-cta h3 { color: #fff; border-color: rgba(255, 255, 255, .14); }
.side-cta p { font-size: 14px; color: rgba(255, 255, 255, .66); margin-bottom: 18px; }

/* ============================ FAQ ============================ */
.faq {
  display: grid;
  gap: 14px;
  max-width: 880px;
  margin: 0 auto;
}
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 24px;
  transition: box-shadow .3s ease, border-color .3s ease, background .3s ease;
}
.faq details[open] {
  border-color: rgba(255, 95, 61, .35);
  box-shadow: var(--shadow-md);
}
.faq details:hover { border-color: rgba(255, 95, 61, .28); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 40px 18px 0;
  position: relative;
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #f2f4f8;
  color: #5b6577;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 700;
  transition: transform .3s ease, background .3s ease, color .3s ease;
}
.faq details[open] summary::after {
  content: "−";
  background: var(--grad);
  color: #fff;
  transform: translateY(-50%) rotate(180deg);
}
.faq .faq-body {
  padding: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
  border-top: 1px dashed var(--line);
  margin-top: 2px;
  padding-top: 16px;
}
.section-dark .faq details { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .12); }
.section-dark .faq summary { color: #fff; }
.section-dark .faq summary::after { background: rgba(255, 255, 255, .1); color: #fff; }
.section-dark .faq .faq-body { color: rgba(255, 255, 255, .62); border-color: rgba(255, 255, 255, .12); }

/* ============================ CTA ============================ */
.cta-panel {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  padding: 66px 60px;
  background: var(--ink);
  color: rgba(255, 255, 255, .74);
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 40px;
  align-items: center;
  isolation: isolate;
}
.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(520px 320px at 88% 10%, rgba(255, 95, 61, .38), transparent 66%),
    radial-gradient(420px 300px at 6% 96%, rgba(23, 184, 166, .24), transparent 68%);
}
.cta-panel::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .16);
  z-index: -1;
}
.cta-panel h2 {
  color: #fff;
  font-size: clamp(26px, 3vw, 36px);
  margin-bottom: 14px;
}
.cta-panel p { margin: 0; font-size: 15.5px; color: rgba(255, 255, 255, .66); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-end; }

/* ============================ 表单 ============================ */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: #37415a; }
.field label .req { color: var(--accent); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid #dde2ec;
  background: #fbfcfe;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.field textarea { resize: vertical; min-height: 132px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255, 95, 61, .12);
}
.field .hint { font-size: 12.5px; color: #98a1b2; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 16px; }
.form-success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(23, 184, 166, .12);
  border: 1px solid rgba(23, 184, 166, .32);
  color: #0c7d71;
  font-size: 14px;
}
.form-success.show { display: block; animation: revealUp .5s ease both; }

/* 联系信息卡 */
.contact-card {
  display: flex;
  gap: 16px;
  padding: 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.contact-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.contact-card .ico {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--grad-soft);
  color: #d9482c;
  font-size: 18px;
  font-weight: 900;
}
.contact-card h3 { font-size: 16px; margin-bottom: 4px; }
.contact-card p { font-size: 14.5px; color: var(--muted); margin: 0; }
.contact-card .strong { color: var(--ink); font-weight: 700; font-size: 16px; }

/* ============================ 团队 / 时间线 ============================ */
.team-card {
  text-align: center;
  padding: 30px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: transform .3s ease, box-shadow .3s ease;
}
.team-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.team-card img {
  width: 108px;
  height: 108px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 18px;
  border: 4px solid #fff;
  box-shadow: 0 12px 26px rgba(16, 23, 36, .14);
}
.team-card h3 { font-size: 17px; }
.team-card .role { display: block; font-size: 13px; color: #d9482c; font-weight: 600; margin: 4px 0 10px; }
.team-card p { font-size: 14px; color: var(--muted); margin: 0; }

.timeline { position: relative; max-width: 860px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(255, 171, 46, .25));
}
.timeline-item {
  position: relative;
  padding: 0 0 34px 58px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--accent);
  box-shadow: 0 0 0 5px rgba(255, 95, 61, .12);
}
.timeline-item time {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #d9482c;
  letter-spacing: .6px;
  margin-bottom: 6px;
}
.timeline-item h3 { font-size: 18px; margin-bottom: 6px; }
.timeline-item p { font-size: 14.5px; color: var(--muted); margin: 0; }

/* ============================ 价值 / 拆分 ============================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split .media {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.split .media img { width: 100%; aspect-ratio: 4 / 3.2; object-fit: cover; }
.split .media .badge-float {
  position: absolute;
  left: 20px;
  bottom: 20px;
  padding: 12px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  color: #4a5568;
}
.split .media .badge-float b { display: block; font-size: 20px; color: var(--ink); letter-spacing: -.5px; }
.split ul.checklist { display: grid; gap: 12px; margin-top: 22px; }
.split ul.checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  color: #4a5568;
}
.split ul.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(23, 184, 166, .14);
  color: #0f9488;
  font-size: 12px;
  font-weight: 900;
  display: grid;
  place-items: center;
  margin-top: 4px;
}

/* ============================ 报价 ============================ */
.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 36px 30px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.plan:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.plan.featured {
  border-color: transparent;
  background: var(--ink);
  color: rgba(255, 255, 255, .7);
  box-shadow: var(--shadow-lg);
}
.plan.featured h3, .plan.featured .price { color: #fff; }
.plan.featured p { color: rgba(255, 255, 255, .62); }
.plan.featured .plan-list li { color: rgba(255, 255, 255, .78); border-color: rgba(255, 255, 255, .10); }
.plan .flag {
  position: absolute;
  right: 24px;
  top: -14px;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .6px;
  box-shadow: 0 8px 18px rgba(255, 95, 61, .4);
}
.plan h3 { font-size: 19px; }
.plan .price { font-size: 34px; font-weight: 900; color: var(--ink); letter-spacing: -1px; line-height: 1.1; }
.plan .price small { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan.featured .price small { color: rgba(255, 255, 255, .55); }
.plan > p { font-size: 14.5px; color: var(--muted); margin: 0; }
.plan-list { display: grid; gap: 10px; margin: 0; }
.plan-list li {
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  color: #4a5568;
}
.plan-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.plan-list li::before { content: "✓  "; color: #17b8a6; font-weight: 900; }

/* ============================ 页脚 ============================ */
.site-footer {
  background: #0a101b;
  color: rgba(255, 255, 255, .60);
  padding: 68px 0 28px;
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 44px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}
.site-footer .brand { color: #fff; margin-bottom: 18px; }
.site-footer .brand-text small { color: rgba(255, 255, 255, .45); }
.footer-about p { font-size: 14px; color: rgba(255, 255, 255, .52); max-width: 330px; margin-bottom: 18px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .10);
  color: rgba(255, 255, 255, .72);
  font-size: 12px;
  transition: background .25s ease, transform .25s ease, color .25s ease;
}
.footer-social a:hover { background: var(--grad); color: #fff; transform: translateY(-3px); }
.footer-col h3 {
  color: #fff;
  font-size: 14.5px;
  letter-spacing: .8px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.footer-col ul { display: grid; gap: 11px; }
.footer-col a, .footer-col li {
  font-size: 14px;
  color: rgba(255, 255, 255, .56);
  transition: color .2s ease, padding-left .2s ease;
}
.footer-col a:hover { color: var(--accent-2); padding-left: 4px; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-bottom nav a:hover { color: #fff; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 0;
  background: var(--ink);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s ease, transform .3s ease, visibility .3s ease, background .3s ease;
  z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--accent); }

/* ============================ 动效 ============================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s cubic-bezier(.22, .65, .35, 1), transform .8s cubic-bezier(.22, .65, .35, 1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
@keyframes revealUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.hero-copy > * { animation: revealUp .8s cubic-bezier(.22, .65, .35, 1) both; }
.hero-copy > *:nth-child(1) { animation-delay: .05s; }
.hero-copy > *:nth-child(2) { animation-delay: .13s; }
.hero-copy > *:nth-child(3) { animation-delay: .21s; }
.hero-copy > *:nth-child(4) { animation-delay: .29s; }
.hero-copy > *:nth-child(5) { animation-delay: .37s; }
.hero-visual { animation: revealUp .9s .22s cubic-bezier(.22, .65, .35, 1) both; }

/* ============================ 响应式 ============================ */
@media (max-width: 1080px) {
  .hero-grid { gap: 40px; }
  .hero-float.one { left: -8px; }
  .hero-float.two { right: -6px; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 290px; gap: 30px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col:last-child { grid-column: 2 / -1; }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    left: 0;
    right: 0;
    top: 76px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 20px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px rgba(16, 23, 36, .12);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .28s ease, transform .28s ease, visibility .28s ease;
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { padding: 13px 14px; font-size: 16px; }
  .nav-links a::after { display: none; }
  .nav-links a[aria-current="page"] { background: rgba(255, 95, 61, .08); }
  .nav-toggle { display: grid; }
  .nav-actions .btn { display: none; }

  .hero { padding: 64px 0 76px; }
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .hero-visual { max-width: 520px; }
  .hero-visual .frame img { aspect-ratio: 4 / 3.4; }
  .section { padding: 74px 0; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats-strip > div:nth-child(2n) { border-right: 0; }
  .stats-strip > div:nth-child(-n+2) { border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta-panel { grid-template-columns: 1fr; padding: 48px 34px; }
  .cta-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
  .footer-col:last-child { grid-column: auto; }
  .footer-about { grid-column: 1 / -1; }
  .page-hero { padding: 56px 0 60px; }
  .article-body { padding: 30px; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .container { padding: 0 18px; }
  .nav-wrap { height: 68px; }
  .nav-links { top: 68px; }
  .brand { font-size: 16px; }
  .brand-mark { width: 36px; height: 36px; border-radius: 10px; font-size: 13px; }
  .brand-text small { font-size: 10px; letter-spacing: 1.4px; }
  .hero h1 { font-size: 31px; letter-spacing: -.6px; }
  .hero-lead { font-size: 15.5px; }
  .hero-metrics { grid-template-columns: 1fr 1fr; gap: 16px; }
  .hero-metrics .num { font-size: 25px; }
  .hero-float { padding: 12px 14px; }
  .hero-float .v { font-size: 16px; }
  .hero-float.one { left: 0; top: 20px; }
  .hero-float.two { right: 0; bottom: 26px; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 38px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .stats-strip > div { padding: 24px 20px; }
  .stats-strip .num { font-size: 26px; }
  .feature-card, .service-card, .plan { padding: 26px 22px; }
  .cta-panel { padding: 38px 24px; border-radius: 22px; }
  .cta-actions .btn { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .sidebar { grid-template-columns: 1fr; }
  .article-body { padding: 24px 20px; }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 17.5px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .to-top { right: 16px; bottom: 16px; }
  .hero-actions .btn { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}