:root {
  --bg: #ffffff;
  --bg-soft: #f6f9fc;
  --bg-card: #ffffff;
  --line: #e5eaf1;
  --text: #0f172a;
  --text-soft: #52627a;
  --text-dim: #8798ad;
  --brand: #0284c7;
  --brand-2: #06b6d4;
  --brand-soft: #e8f6fd;
  --ok: #059669;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px -12px rgba(15, 23, 42, .12);
  --radius: 14px;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 28px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-img { height: 36px; width: auto; display: block; }
.logo-icon { height: 30px; width: auto; display: block; }
.logo-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
}
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-soft); font-size: 15px; }
.nav-links a:hover { color: var(--brand); text-decoration: none; }
.nav-links a.active { color: var(--brand); font-weight: 600; }
.nav-cta {
  padding: 8px 16px; border-radius: 9px; background: var(--brand); color: #fff !important;
  font-size: 14px; font-weight: 600;
}
.nav-cta:hover { background: #0369a1; text-decoration: none; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 64px; background: linear-gradient(180deg, #f2fbfe 0%, #ffffff 78%); }
.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 13px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: var(--brand-soft); color: var(--brand); border: 1px solid #cdeaf8;
}
h1 { font-size: 44px; line-height: 1.25; margin: 20px 0 16px; letter-spacing: -.5px; }
h1 .grad {
  background: linear-gradient(120deg, var(--brand-2), var(--brand) 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: 18px; color: var(--text-soft); max-width: 660px; margin: 0 0 32px; }
.btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 11px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #0369a1; text-decoration: none; }
.btn-ghost { background: #fff; color: var(--text); border-color: var(--line); box-shadow: var(--shadow); }
.btn-ghost:hover { border-color: #c9d6e2; text-decoration: none; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 52px; }
.stat { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.stat b { display: block; font-size: 28px; letter-spacing: -.5px; }
.stat span { font-size: 13px; color: var(--text-dim); }

/* ---------- sections ---------- */
section { padding: 70px 0; }
section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { margin-bottom: 36px; }
.sec-head h2 { font-size: 30px; margin: 0 0 10px; letter-spacing: -.3px; }
.sec-head p { color: var(--text-soft); margin: 0; max-width: 620px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.card h3 { margin: 14px 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--text-soft); font-size: 15px; }
.ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand); font-size: 19px; font-weight: 700;
}

/* ---------- code ---------- */
pre {
  background: #0f172a; color: #e2e8f0; border-radius: 12px; padding: 18px 20px;
  overflow-x: auto; font-size: 13.5px; line-height: 1.65; margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
pre .c { color: #7d8ca3; }
code.inline {
  background: var(--brand-soft); color: #075985; padding: 2px 7px; border-radius: 6px;
  font-size: 13.5px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
th, td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line); }
th { background: #f9fbfd; font-size: 13px; color: var(--text-dim); font-weight: 600; letter-spacing: .3px; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fbfdff; }
td.mono, th.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; }
.pill {
  display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
  background: #e9f9f1; color: var(--ok);
}

/* ---------- steps ---------- */
.step { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px dashed var(--line); }
.step:last-child { border-bottom: none; }
.step-n {
  flex: 0 0 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: var(--brand); color: #fff; font-size: 14px; font-weight: 700;
}
.step h4 { margin: 3px 0 8px; font-size: 16px; }
.step p { margin: 0 0 10px; color: var(--text-soft); font-size: 15px; }

/* ---------- faq ---------- */
details {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 12px; box-shadow: var(--shadow);
}
details summary { cursor: pointer; font-weight: 600; font-size: 15.5px; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: "＋"; color: var(--brand); margin-right: 10px; font-weight: 700; }
details[open] summary::before { content: "－"; }
details p { color: var(--text-soft); font-size: 15px; margin: 12px 0 0 24px; }

/* ---------- cta band ---------- */
.band {
  background: linear-gradient(120deg, #0b3b5c, #0369a1 55%, #06b6d4);
  color: #fff; border-radius: 18px; padding: 44px; text-align: center;
}
.band h2 { margin: 0 0 10px; font-size: 28px; color: #fff; }
.band p { color: #d8f1fb; margin: 0 auto 26px; max-width: 520px; }
.band .btn-primary { background: #fff; color: #0369a1; }
.band .btn-primary:hover { background: #e8f6fd; }
.band .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); box-shadow: none; }
.band .btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 40px 0; background: var(--bg-soft); }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; color: var(--text-soft); font-size: 14px; }
.foot-links { display: flex; gap: 20px; flex-wrap: wrap; }
.foot a { color: var(--text-soft); }
.foot a:hover { color: var(--brand); }

/* ---------- misc ---------- */
.note {
  background: var(--brand-soft); border: 1px solid #cdeaf8; border-radius: 12px;
  padding: 14px 18px; font-size: 14.5px; color: #075985;
}
.kv { display: grid; grid-template-columns: 150px 1fr; gap: 10px 18px; font-size: 15px; }
.kv dt { color: var(--text-dim); }
.kv dd { margin: 0; }
h2.page-title { font-size: 34px; margin: 0 0 12px; letter-spacing: -.4px; }
.page-hero { padding: 60px 0 10px; background: linear-gradient(180deg, #f2fbfe, #fff); }
.page-hero p { color: var(--text-soft); max-width: 660px; font-size: 17px; }

@media (max-width: 860px) {
  h1 { font-size: 32px; }
  h2.page-title { font-size: 27px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; font-size: 14px; }
  .nav-links a:not(.nav-cta):nth-child(n+4) { display: none; }
  .hero { padding: 54px 0 44px; }
  section { padding: 48px 0; }
  .band { padding: 32px 22px; }
  .kv { grid-template-columns: 1fr; gap: 4px 0; }
  .kv dd { margin-bottom: 10px; }
}

/* ================= 首页 v2（公司官网） ================= */

/* --- 入场动画 --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
.anim { opacity: 0; animation: fadeUp .7s ease forwards; }
.anim.d1 { animation-delay: .05s; }
.anim.d2 { animation-delay: .15s; }
.anim.d3 { animation-delay: .28s; }
.anim.d4 { animation-delay: .42s; }
.anim.d5 { animation-delay: .55s; }

/* --- 滚动显现 --- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .anim, .reveal { opacity: 1 !important; transform: none !important; animation: none !important; transition: none !important; }
}

/* --- hero v2 --- */
.hero-v2 {
  position: relative; overflow: hidden;
  padding: 92px 0 76px;
  background: linear-gradient(165deg, #f2fbfe 0%, #eaf7fd 34%, #ffffff 72%);
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center;
}
.hero-v2 h1 { font-size: 50px; margin: 22px 0 18px; }
.hero-v2 .lead { font-size: 17.5px; margin-bottom: 30px; }
.hero-mini {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-top: 30px; font-size: 13.5px; color: var(--text-dim);
}
.hero-mini i { width: 4px; height: 4px; border-radius: 50%; background: #c3d4e4; }
.hero-visual { position: relative; }
.hero-visual img {
  width: 100%; display: block; border-radius: 20px;
  border: 1px solid rgba(2, 132, 199, .14);
  box-shadow: 0 24px 60px -24px rgba(2, 60, 100, .28);
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.float-chip {
  position: absolute; padding: 8px 15px; border-radius: 999px;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border: 1px solid rgba(2,132,199,.18);
  font-size: 13px; font-weight: 600; color: var(--brand);
  box-shadow: 0 8px 22px -10px rgba(2,60,100,.25);
  animation: chipFloat 5.5s ease-in-out infinite;
}
.float-chip.c1 { top: 8%; left: -18px; animation-delay: 0s; }
.float-chip.c2 { top: 46%; right: -14px; animation-delay: 1.4s; }
.float-chip.c3 { bottom: 7%; left: 10%; animation-delay: 2.6s; }
@keyframes chipFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* hero 背景光斑 */
.hero-blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5; z-index: 1; }
.hero-blob.b1 { width: 420px; height: 420px; left: -120px; top: -140px; background: #bfe8fb; animation: blobMove 12s ease-in-out infinite; }
.hero-blob.b2 { width: 340px; height: 340px; right: -100px; top: 30%; background: #d3f1fb; animation: blobMove 14s ease-in-out infinite reverse; }
.hero-blob.b3 { width: 300px; height: 300px; left: 38%; bottom: -160px; background: #e5f6fe; animation: blobMove 16s ease-in-out infinite; }
@keyframes blobMove {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(26px, -20px) scale(1.08); }
}

/* --- 我们是谁 --- */
.about-flow { display: flex; gap: 26px; align-items: stretch; }
.about-col {
  flex: 1; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
}
.about-col h3 { margin: 14px 0 8px; font-size: 18px; }
.about-col p { margin: 0; color: var(--text-soft); font-size: 15px; }
.year-badge {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  background: linear-gradient(120deg, var(--brand-2), var(--brand));
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: .5px;
}
.about-arrow {
  align-self: center; font-size: 30px; color: var(--brand); font-weight: 300;
  animation: arrowPulse 2.2s ease-in-out infinite;
}
@keyframes arrowPulse { 0%,100% { transform: translateX(0); opacity: .7; } 50% { transform: translateX(7px); opacity: 1; } }

/* --- 服务卡片 --- */
.svc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.svc-card {
  display: block; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  color: var(--text); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.svc-card:hover {
  text-decoration: none; transform: translateY(-6px);
  box-shadow: 0 20px 44px -18px rgba(2, 60, 100, .3); border-color: #bfe4f7;
}
.svc-img { overflow: hidden; height: 210px; }
.svc-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.svc-card:hover .svc-img img { transform: scale(1.06); }
.svc-body { padding: 22px 24px 24px; }
.svc-body h3 { margin: 0 0 8px; font-size: 18px; }
.svc-body p { margin: 0; color: var(--text-soft); font-size: 14.5px; }
.svc-card.svc-ai { border-color: #bfe4f7; background: linear-gradient(180deg, #fbfeff, #f4fbfe); }
.svc-body .pill { margin-left: 6px; vertical-align: 2px; }

/* --- 客户墙 --- */
.client-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.client {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 18px; text-align: center; box-shadow: var(--shadow);
  transition: transform .25s ease, border-color .25s ease;
}
.client:hover { transform: translateY(-4px); border-color: #bfe4f7; }
.client b { display: block; font-size: 16.5px; letter-spacing: .3px; }
.client span { display: block; margin-top: 5px; font-size: 12.5px; color: var(--text-dim); }
.client-more { display: grid; place-items: center; background: var(--brand-soft); border-color: #cdeaf8; }
.client-more a { font-weight: 600; }

/* --- AI 服务入口 --- */
.ai-entry {
  background: var(--bg-card); border: 1px solid #cdeaf8; border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}
.ai-entry:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgba(2, 60, 100, .28); }
.ai-entry-head { display: flex; gap: 16px; align-items: center; margin-bottom: 14px; }
.ai-entry-head .ico { width: 46px; height: 46px; font-size: 21px; }
.ai-entry-head h3 { margin: 0; font-size: 18px; }
.ai-url {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px; color: var(--brand); background: var(--brand-soft);
  padding: 2px 9px; border-radius: 6px;
}
.ai-entry p { color: var(--text-soft); font-size: 15px; margin: 0 0 20px; }
.model-strip {
  margin-top: 30px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: 14px; color: var(--text-soft);
}
.model-strip span {
  padding: 5px 14px; border-radius: 999px; background: #fff;
  border: 1px solid var(--line); font-weight: 600;
}
.model-strip a { margin-left: auto; font-weight: 600; }

/* --- 首页 v2 响应式 --- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-v2 h1 { font-size: 36px; }
  .svc-grid { grid-template-columns: 1fr; }
  .client-wall { grid-template-columns: repeat(2, 1fr); }
  .about-flow { flex-direction: column; }
  .about-arrow { transform: rotate(90deg); align-self: center; }
  .float-chip.c1 { left: 6px; }
  .float-chip.c2 { right: 6px; }
}

/* ================= v3：色彩层次强化 ================= */

/* stats 数字渐变 */
.stat b {
  background: linear-gradient(120deg, #0284c7, #06b6d4);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* 服务卡彩色顶条 */
.svc-card { position: relative; }
.svc-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--accent, linear-gradient(90deg, #0284c7, #06b6d4));
  z-index: 2;
}
.sc-brand { --accent: linear-gradient(90deg, #0ea5e9, #06b6d4); }
.sc-event { --accent: linear-gradient(90deg, #f59e0b, #f97316); }
.sc-film  { --accent: linear-gradient(90deg, #8b5cf6, #6366f1); }
.sc-ai    { --accent: linear-gradient(90deg, #10b981, #06b6d4); }
.sc-brand:hover { border-color: #7dd3fc; }
.sc-event:hover { border-color: #fcd34d; }
.sc-film:hover  { border-color: #c4b5fd; }
.sc-ai:hover    { border-color: #6ee7b7; }

/* 客户墙彩色 hover */
.client b { transition: color .25s ease; }
.client:nth-child(4n+1):hover b { color: #0284c7; }
.client:nth-child(4n+2):hover b { color: #f97316; }
.client:nth-child(4n+3):hover b { color: #8b5cf6; }
.client:nth-child(4n+4):hover b { color: #10b981; }

/* 关于区双色角标 */
.about-col:first-child { border-top: 3px solid; border-image: linear-gradient(90deg, #0ea5e9, #06b6d4) 1; }
.about-col:last-child  { border-top: 3px solid; border-image: linear-gradient(90deg, #8b5cf6, #06b6d4) 1; }

/* ---- AI 服务深色版块 ---- */
.ai-section {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, #07253f 0%, #0b3b5c 55%, #0e5178 100%);
  padding: 76px 0;
}
.ai-section .sec-head h2 { color: #fff; }
.ai-section .sec-head p { color: #a8d8ef; }
.ai-blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .35; }
.ai-blob.ab1 { width: 380px; height: 380px; right: -100px; top: -120px; background: #06b6d4; animation: blobMove 13s ease-in-out infinite; }
.ai-blob.ab2 { width: 320px; height: 320px; left: -110px; bottom: -140px; background: #2563eb; animation: blobMove 15s ease-in-out infinite reverse; }
.ai-section .ai-entry { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.98); }
.ai-section .ico { background: linear-gradient(135deg, #06b6d4, #0284c7); color: #fff; }
.ai-url { background: #e0f2fe; }
.model-strip span {
  background: rgba(255,255,255,.09); border-color: rgba(255,255,255,.22); color: #dff3fc;
}
.model-strip a { color: #7dd3fc; }

/* CTA / 页脚邮箱 */
.band p.band-mail-tip { margin: 30px auto 0; font-size: 13.5px; color: #bfe6f7; }
.band-mail-tip b { color: #fff; }
.band .btn-primary { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .2px; }
.foot-mail { display: inline-block; margin-top: 8px; color: var(--brand); font-weight: 600; font-size: 14px; }

/* 图标着色：其他页面沿用 */
.ico { transition: transform .3s ease; }
.card:hover .ico { transform: scale(1.1) rotate(-6deg); }


/* ================= 教程文章页 ================= */
.post-hero { padding: 56px 0 34px; background: linear-gradient(180deg, #f2fbfe, #fff); border-bottom: 1px solid var(--line); }
.post-hero .crumb { font-size: 13.5px; color: var(--text-dim); margin-bottom: 14px; }
.post-hero .crumb a { color: var(--text-dim); }
.post-hero .crumb a:hover { color: var(--brand); }
.post-hero h1 { font-size: 32px; margin: 0 0 12px; line-height: 1.35; }
.post-meta { font-size: 13.5px; color: var(--text-dim); display: flex; gap: 16px; flex-wrap: wrap; }
.post-body { max-width: 780px; margin: 0 auto; padding: 40px 24px 70px; }
.post-body h2 { font-size: 24px; margin: 44px 0 14px; padding-left: 12px; border-left: 4px solid var(--brand); line-height: 1.4; }
.post-body h3 { font-size: 18.5px; margin: 30px 0 10px; }
.post-body p { color: #334155; font-size: 15.8px; margin: 12px 0; }
.post-body ul, .post-body ol { color: #334155; font-size: 15.5px; padding-left: 24px; }
.post-body li { margin: 7px 0; }
.post-body blockquote {
  margin: 20px 0; padding: 14px 20px; background: var(--brand-soft);
  border-left: 4px solid var(--brand-2); border-radius: 8px; color: #075985; font-size: 15px;
}
.post-body img { max-width: 100%; border-radius: 12px; margin: 18px 0; }
.post-body .kbd {
  display: inline-block; padding: 1px 8px; border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 6px; background: #f8fafc; font-size: 13.5px; font-family: ui-monospace, Consolas, monospace;
}
.post-cta {
  margin: 44px 0 0; background: linear-gradient(120deg, #0b3b5c, #0369a1 55%, #06b6d4);
  border-radius: 16px; padding: 30px; text-align: center; color: #fff;
}
.post-cta h3 { margin: 0 0 8px; font-size: 20px; color: #fff; }
.post-cta p { color: #d8f1fb; font-size: 14.5px; margin: 0 auto 18px; max-width: 460px; }
.post-nav { max-width: 780px; margin: 0 auto; padding: 0 24px 60px; display: flex; justify-content: space-between; gap: 16px; }
.post-nav a { font-size: 14.5px; font-weight: 600; }
/* 教程列表卡片 */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.blog-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); color: var(--text); display: flex; flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease;
}
.blog-card:hover { text-decoration: none; transform: translateY(-5px); box-shadow: 0 18px 40px -18px rgba(2,60,100,.3); }
.blog-card .bc-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.blog-card h3 { margin: 0 0 8px; font-size: 16.5px; line-height: 1.5; }
.blog-card p { margin: 0 0 14px; color: var(--text-soft); font-size: 14px; flex: 1; }
.blog-card .bc-more { color: var(--brand); font-size: 13.5px; font-weight: 600; }
.blog-card .bc-tag {
  display: inline-block; align-self: flex-start; margin-bottom: 12px; padding: 2px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; background: var(--brand-soft); color: var(--brand);
}
@media (max-width: 900px) { .blog-grid { grid-template-columns: 1fr; } .post-hero h1 { font-size: 25px; } }


/* ================= v9：深色 Hero + 滚动客户墙 ================= */

/* --- Hero 深蓝夜色版 --- */
.hero-v2 {
  background: linear-gradient(158deg, #03192c 0%, #062c47 42%, #0b3b5c 100%);
}
.hero-v2::before {
  background-image: radial-gradient(circle, rgba(255, 255, 255, .12) 1px, transparent 1.4px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 58%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 58%);
}
.hero-v2 .tag {
  background: rgba(103, 232, 249, .09);
  border-color: rgba(125, 211, 252, .32);
  color: #7dd3fc;
}
.hero-v2 h1 { color: #fff; }
.hero-v2 .lead { color: #a9cfe6; }
.hero-mini { color: #7fa8c4; }
.hero-mini i { background: rgba(255, 255, 255, .35); }
.hero-v2 .hero-visual img {
  border-color: rgba(255, 255, 255, .16);
  box-shadow: 0 34px 80px -28px rgba(0, 0, 0, .6);
}
.float-chip {
  background: rgba(8, 38, 62, .78);
  border-color: rgba(125, 211, 252, .38);
  color: #bfe9ff;
  box-shadow: 0 10px 26px -10px rgba(0, 0, 0, .5);
}
.hero-blob { opacity: .42; }
.hero-blob.b1 { background: #0891b2; }
.hero-blob.b2 { background: #2563eb; }
.hero-blob.b3 { background: #0e7490; }
.hero-v2 .btn-ghost {
  background: rgba(255, 255, 255, .06);
  color: #fff;
  border-color: rgba(255, 255, 255, .38);
  box-shadow: none;
}
.hero-v2 .btn-ghost:hover {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .55);
}

/* --- 客户墙：无缝滚动 marquee --- */
.client-marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex; gap: 16px; width: max-content;
  animation: marquee 30s linear infinite;
}
.client-marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.marquee-track .client { flex: 0 0 auto; width: 220px; }
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
  .client-marquee { -webkit-mask-image: none; mask-image: none; }
}
.client-more-line { text-align: center; margin-top: 26px; }
.client-more-line a { font-weight: 600; }

/* logo 客户卡 */
.client-logo { display: grid; place-items: center; padding: 18px 26px; min-width: 210px; }
.client-logo img {
  width: 170px; height: auto; max-height: 96px; object-fit: contain;
  filter: grayscale(1) opacity(.62);
  transition: filter .3s ease, opacity .3s ease, transform .3s ease;
}
.client-logo:hover img { filter: none; opacity: 1; transform: scale(1.06); }


/* ================= v8：高级感精修 ================= */

/* --- 全局微质感 --- */
::selection { background: rgba(2, 132, 199, .22); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: #c6d5e2; border-radius: 999px; border: 2px solid #fff;
}
::-webkit-scrollbar-thumb:hover { background: #a8bdd0; }
[id] { scroll-margin-top: 84px; }
h1, h2, h3 { text-wrap: balance; }
b, .stat b { font-variant-numeric: tabular-nums; }

/* --- 排印升级 --- */
.hero-v2 h1 { font-size: 56px; font-weight: 800; letter-spacing: -.022em; line-height: 1.16; margin: 24px 0 20px; }
.hero-v2 .lead { font-size: 18px; line-height: 1.85; }
.sec-head h2 { font-size: 34px; letter-spacing: -.02em; }
section { padding: 88px 0; }

/* 眉题（kicker） */
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .18em;
  color: var(--brand); text-transform: uppercase; margin-bottom: 14px;
}
.kicker::before { content: ""; width: 26px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--brand-2), var(--brand)); }
.ai-section .kicker { color: #7dd3fc; }

/* --- 按钮精修 --- */
.btn { transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease; }
.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #0284c7 60%);
  box-shadow: 0 10px 24px -10px rgba(2, 132, 199, .55);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #0284c7, #0369a1 60%);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -10px rgba(2, 132, 199, .6);
  text-decoration: none;
}
.btn:active { transform: translateY(0); }
.btn-ghost:hover { transform: translateY(-1px); border-color: #b7cadd; text-decoration: none; }
.nav-cta { transition: transform .2s ease, box-shadow .2s ease; box-shadow: 0 6px 16px -6px rgba(2,132,199,.5); }
.nav-cta:hover { transform: translateY(-1px); text-decoration: none; }

/* --- hero 圆点网格底纹 --- */
.hero-v2::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(circle, rgba(2, 96, 160, .13) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 62%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 62%);
}

/* --- 数字卡精修 --- */
.stat { position: relative; overflow: hidden; }
.stat b { font-size: 34px; font-weight: 800; letter-spacing: -.02em; }
.stat span { letter-spacing: .06em; }
.stat::after {
  content: ""; position: absolute; left: 22px; right: 22px; top: 0; height: 3px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, #0ea5e9, #06b6d4); opacity: 0;
  transition: opacity .3s ease;
}
.stat:hover::after { opacity: 1; }

/* --- 卡片投影统一升档 --- */
.svc-card, .about-col, .ai-entry, .client { transition-duration: .35s; }
.svc-card:hover, .about-col:hover { transform: translateY(-6px); }

/* --- AI 深色版块微调 --- */
.ai-section { padding: 96px 0; }
.ai-section .ai-entry { backdrop-filter: blur(4px); }

/* --- CTA 深蓝横幅精修 --- */
.band {
  position: relative; overflow: hidden;
  background: linear-gradient(125deg, #062c47 0%, #094a74 48%, #0a628f 78%, #0d7ea8 100%);
  border-radius: 22px; padding: 56px 44px;
  box-shadow: 0 30px 70px -30px rgba(3, 50, 84, .55);
}
.band::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(560px 240px at 78% 0%, rgba(103, 232, 249, .16), transparent 65%),
    radial-gradient(420px 200px at 8% 100%, rgba(37, 99, 235, .18), transparent 60%);
}
.band > * { position: relative; z-index: 1; }
.band h2 { font-size: 30px; letter-spacing: -.01em; }

/* --- 页脚微调 --- */
footer { padding: 48px 0; }
.foot a { transition: color .2s ease; }

@media (max-width: 860px) {
  .hero-v2 h1 { font-size: 34px; }
  .sec-head h2 { font-size: 27px; }
  section { padding: 56px 0; }
  .ai-section { padding: 64px 0; }
  .band { padding: 40px 22px; }
  .kicker { letter-spacing: .12em; }
}

/* ---------- lang switch (v12) ---------- */
.lang-btn {
  margin-left: 4px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.4;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.lang-btn:hover { color: var(--brand); border-color: var(--brand); background: var(--brand-soft); }
@media (max-width: 900px) {
  .lang-btn { padding: 4px 9px; font-size: 12px; }
}

/* ================= v13：主题（深色模式）+ 主题设置弹窗 ================= */

/* --- 深色变量覆盖 --- */
html[data-theme="dark"] {
  --bg: #0b1622;
  --bg-soft: #0e1a28;
  --bg-card: #121f2e;
  --line: #20334a;
  --text: #e6eef7;
  --text-soft: #a9bacd;
  --text-dim: #7c90a6;
  --brand: #38bdf8;
  --brand-2: #22d3ee;
  --brand-soft: rgba(56, 189, 248, .13);
  --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 10px 28px -14px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

/* --- 逐点修正硬编码的浅色 --- */
html[data-theme="dark"] .nav { background: rgba(11, 22, 34, .86); }
html[data-theme="dark"] .hero,
html[data-theme="dark"] .page-hero,
html[data-theme="dark"] .post-hero { background: linear-gradient(180deg, #0e2233, #0b1622); }
html[data-theme="dark"] .tag { border-color: rgba(125, 211, 252, .3); }
html[data-theme="dark"] .btn-ghost { background: var(--bg-card); }
html[data-theme="dark"] .btn-ghost:hover { border-color: #35506e; }
html[data-theme="dark"] .nav-cta:hover,
html[data-theme="dark"] .btn-primary:hover { background: linear-gradient(135deg, #0284c7, #075985 60%); }
html[data-theme="dark"] .table-wrap { background: var(--bg-card); }
html[data-theme="dark"] th { background: rgba(255, 255, 255, .04); }
html[data-theme="dark"] tbody tr:hover { background: rgba(255, 255, 255, .045); }
html[data-theme="dark"] details { background: var(--bg-card); }
html[data-theme="dark"] .model-strip span { background: rgba(255, 255, 255, .05); }
html[data-theme="dark"] .kbd { background: #0e1a28; }
html[data-theme="dark"] code.inline { color: #7dd3fc; }
html[data-theme="dark"] .note { color: #7dd3fc; }
html[data-theme="dark"] .post-body p,
html[data-theme="dark"] .post-body ul,
html[data-theme="dark"] .post-body ol { color: #c2cfdd; }
html[data-theme="dark"] .post-body blockquote { color: #7dd3fc; }
html[data-theme="dark"] .pill { background: rgba(16, 185, 129, .14); }
html[data-theme="dark"] .svc-card.svc-ai { background: linear-gradient(180deg, #12202f, #0f1c2b); }
/* v16 修复：ai-section 白卡在深色模式下文字继承浅色变量导致看不清，锁定深色文字 */
html[data-theme="dark"] .ai-section .ai-entry h3 { color: #0f172a; }
html[data-theme="dark"] .ai-section .ai-entry p { color: #52627a; }
html[data-theme="dark"] .ai-section .ai-url { color: #0369a1; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #28405c; border-color: #0b1622; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #35516f; }
html[data-theme="dark"] .client-logo img { filter: grayscale(1) opacity(.7); }
/* v15 修复：上面 dark 规则优先级压过 .client-logo:hover img，导致深色模式 hover 不变彩色 */
html[data-theme="dark"] .client-logo:hover img { filter: none; opacity: 1; transform: scale(1.06); }

/* --- 主题按钮（导航栏） --- */
.theme-btn {
  width: 34px; height: 34px; margin-left: 4px;
  display: inline-grid; place-items: center;
  border: 1px solid var(--line); border-radius: 50%;
  background: var(--bg-soft); color: var(--text-soft);
  cursor: pointer; padding: 0;
  transition: color .15s ease, border-color .15s ease, background .15s ease, transform .2s ease;
}
.theme-btn:hover { color: var(--brand); border-color: var(--brand); background: var(--brand-soft); transform: rotate(18deg); }
.theme-btn svg { display: block; }

/* --- 主题设置弹窗 --- */
.theme-backdrop {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(5, 14, 24, .55);
  backdrop-filter: blur(3px);
  display: grid; place-items: center; padding: 20px;
}
.theme-backdrop[hidden] { display: none; }
.theme-modal {
  position: relative; width: 100%; max-width: 430px;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 18px; padding: 26px 26px 24px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .55);
  animation: thmPop .22s ease;
}
@keyframes thmPop { from { opacity: 0; transform: translateY(12px) scale(.97); } to { opacity: 1; transform: none; } }
.theme-modal h3 { margin: 0 0 6px; font-size: 19px; }
.theme-sub { margin: 0 0 20px; font-size: 14px; color: var(--text-soft); }
.theme-close {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px; border-radius: 50%;
  border: none; background: var(--bg-soft); color: var(--text-soft);
  font-size: 16px; line-height: 1; cursor: pointer;
}
.theme-close:hover { color: var(--brand); }
.theme-opts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.theme-opt {
  position: relative; padding: 10px 10px 12px;
  border: 1.5px solid var(--line); border-radius: 13px;
  background: var(--bg-soft); cursor: pointer; text-align: center;
  transition: border-color .15s ease, transform .15s ease;
}
.theme-opt:hover { transform: translateY(-2px); border-color: var(--brand); }
.theme-opt .thm-prev {
  display: grid; place-items: center; gap: 3px;
  height: 62px; border-radius: 9px; margin-bottom: 9px; padding: 9px;
}
.theme-opt .thm-prev i { display: block; height: 5px; border-radius: 3px; width: 70%; }
.theme-opt .thm-prev i:nth-child(2) { width: 50%; }
.theme-opt .thm-prev i:nth-child(3) { width: 60%; }
/* 系统：左深右浅分割 */
.prev-sys { background: linear-gradient(105deg, #0d2338 50%, #f1f5f9 50%); }
.prev-sys i { background: #9fb6cc; }
.prev-sys i:first-child { background: #38bdf8; }
/* 浅色 */
.prev-light { background: #f1f5f9; }
.prev-light i { background: #cbd5e1; }
.prev-light i:first-child { background: #94a3b8; }
/* 深色 */
.prev-dark { background: #0d2338; }
.prev-dark i { background: #27435f; }
.prev-dark i:first-child { background: #38bdf8; }
.theme-opt .thm-label { display: block; font-size: 13.5px; font-weight: 600; color: var(--text); }
.theme-opt .thm-check {
  position: absolute; top: -7px; right: -7px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: none; place-items: center; font-size: 12px; font-weight: 700;
  box-shadow: 0 3px 8px rgba(2, 132, 199, .45);
}
.theme-opt.active { border-color: var(--brand); }
.theme-opt.active .thm-check { display: grid; }
@media (max-width: 480px) {
  .theme-opts { gap: 8px; }
  .theme-modal { padding: 22px 18px 18px; }
}