/* 长亭外·文化科技 官网样式 —— 轻奢雅致 / 编辑排版方向 */
:root {
  --ink: #1f2d3d;          /* 墨青 */
  --ink-light: #4a5a6a;
  --brand: #16405b;        /* 品牌藏青 */
  --brand-deep: #0e2c40;
  --gold: #b8924a;         /* 鎏金强调（全站唯一强调色） */
  --bg: #faf9f6;           /* 米白 */
  --card: #ffffff;
  --line: #e6e2d8;
  --shadow-1: 0 2px 8px rgba(14, 44, 64, .07);
  --shadow-2: 0 8px 28px rgba(14, 44, 64, .12);
  --shadow-3: 0 24px 64px rgba(14, 44, 64, .18);
  --shadow: var(--shadow-2);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 180ms; --dur-base: 340ms;
  --font-display: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  letter-spacing: .02em;
}
h1, h2, h3, .serif { font-family: var(--font-display); }
/* 键盘焦点可见（可访问性硬要求） */
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--gold); outline-offset: 2px;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 249, 246, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px;
  height: 76px; display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--brand); }
.logo-img { display: block; width: 46px; height: 46px; flex: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-family: "Songti SC", serif;
}
.logo-text { font-size: 22px; font-weight: 700; letter-spacing: 2.5px; font-family: "Songti SC", serif; line-height: 1.2; }
.logo-text small { display: block; font-size: 10.4px; letter-spacing: 1.7px; color: var(--ink-light); font-weight: 500; font-family: sans-serif; white-space: nowrap; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  position: relative; text-decoration: none; color: var(--ink-light); font-size: 15px;
  padding: 6px 14px; border-radius: 2px;
}
/* 悬停 = 鎏金细线从左扫入（替代通用底色块） */
.nav-links a:not(.btn-login)::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 1px;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform .25s var(--ease-out);
}
.nav-links a:hover { color: var(--brand); }
.nav-links a:not(.btn-login):hover::after { transform: scaleX(1); }
.nav-links a.active { color: var(--brand); font-weight: 600; }
.nav-links a.active::after { transform: scaleX(1); }
.nav-links a.btn-login {
  color: #fff; background: var(--brand); margin-left: 8px;
}
.nav-links a.btn-login:hover { background: var(--brand-deep); }
.lang-select {
  margin-left: 10px; padding: 5px 6px; border: 1px solid var(--line);
  border-radius: 6px; font-size: 13px; color: var(--ink-light);
  background: #fff; cursor: pointer; font-family: inherit;
}
.lang-select:focus { outline: none; border-color: var(--brand); }

/* ---------- Hero（非对称编辑式：左对齐、深色侧压、颗粒氛围） ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    linear-gradient(100deg, rgba(14,44,64,.9) 0%, rgba(14,44,64,.62) 52%, rgba(14,44,64,.3) 100%),
    url("img/hero.jpg") center 58%/cover no-repeat,
    linear-gradient(135deg, #0e2c40 0%, #16405b 60%, #2a5f7f 100%);
  padding: 150px 24px 160px;
}
/* 颗粒氛围层：feTurbulence 噪点，低透明度叠加 */
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero-inner { max-width: 1080px; margin: 0 auto; position: relative; }
.hero > *, .hero-inner > * { position: relative; }
/* 眉标：金色细线引导，非药丸标签 */
.hero-tag {
  display: flex; align-items: center; gap: 16px;
  font-size: 14px; letter-spacing: 6px; color: rgba(255,255,255,.88);
  margin-bottom: 32px; font-family: var(--font-display);
}
.hero-tag::before { content: ""; width: 48px; height: 1px; background: var(--gold); flex: none; }
.hero h1 { font-size: 64px; line-height: 1.14; letter-spacing: 2px; margin-bottom: 24px; font-weight: 600; max-width: 760px; }
.hero p.sub { font-size: 16.5px; color: rgba(255,255,255,.8); max-width: 560px; margin: 0 0 44px; line-height: 1.9; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; text-decoration: none; padding: 13px 38px;
  border-radius: 2px; font-size: 15px; letter-spacing: 2px; cursor: pointer; border: none;
  transition: background var(--dur-fast) ease-out, transform var(--dur-fast) ease-out, border-color var(--dur-fast) ease-out;
}
.btn:hover { transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #a37f3c; }
.btn-ghost { border: 1px solid rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-deep); }

/* ---------- 区块（编辑式：左对齐眉标 + 短金线，弃居中对称） ---------- */
.section { max-width: 1080px; margin: 0 auto; padding: 84px 24px; }
.section-head { text-align: left; margin-bottom: 54px; }
.section-head .eyebrow { font-size: 12px; letter-spacing: 4px; color: var(--gold); margin-bottom: 12px; font-family: Georgia, serif; }
.section-head h2 { font-size: 34px; color: var(--brand); letter-spacing: 2px; line-height: 1.3; }
.section-head .rule { width: 46px; height: 2px; background: var(--gold); margin: 20px 0 0; }
.section-head p.desc { color: var(--ink-light); margin-top: 16px; font-size: 15px; max-width: 640px; }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 800px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } .hero h1 { font-size: 38px; } .hero { padding: 90px 24px 100px; } }

.card {
  position: relative;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 2px; padding: 36px 32px;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
/* 悬停 = 顶部鎏金线扫入 + 阴影抬升（替代千篇一律的默认阴影） */
.card::before {
  content: ""; position: absolute; top: -1px; left: -1px; right: -1px; height: 2px;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease-out);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.card:hover::before { transform: scaleX(1); }
.card .icon { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 19px; color: var(--brand); margin-bottom: 10px; letter-spacing: 1px; }
.card p { font-size: 14.5px; color: var(--ink-light); }

/* 引言：编辑部式拉引（左侧金线大字，弃藏青色块） */
.quote-block {
  background: transparent; color: var(--brand);
  border-left: 3px solid var(--gold); border-radius: 0; padding: 6px 0 6px 36px;
  text-align: left; max-width: 780px;
}
.quote-block p { font-size: 24px; font-family: var(--font-display); letter-spacing: 1px; line-height: 1.65; }
.quote-block .who { margin-top: 14px; font-size: 13px; color: var(--ink-light); }

/* 步骤流程 */
.steps { counter-reset: step; }
.step { display: flex; gap: 20px; padding: 20px 0; border-bottom: 1px dashed var(--line); }
.step:last-child { border-bottom: none; }
.step .num {
  flex: 0 0 44px; height: 44px; border-radius: 50%;
  background: var(--brand); color: #fff; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  font-family: "Songti SC", serif;
}
.step h4 { font-size: 16.5px; color: var(--brand); margin-bottom: 4px; }
.step p { font-size: 14px; color: var(--ink-light); }

/* 页脚 */
.footer { background: var(--brand-deep); color: rgba(255,255,255,.75); margin-top: 40px; }
.footer-inner {
  max-width: 1080px; margin: 0 auto; padding: 52px 24px 30px;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px;
}
@media (max-width: 800px) { .footer-inner { grid-template-columns: 1fr; } }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 14px; letter-spacing: 1px; }
.footer a { color: rgba(255,255,255,.75); text-decoration: none; display: block; font-size: 14px; padding: 3px 0; }
.footer a:hover { color: #fff; }
.footer .info { font-size: 14px; line-height: 2; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  max-width: 1080px; margin: 0 auto; padding: 18px 24px;
  font-size: 12.5px; color: rgba(255,255,255,.5); text-align: center;
}

/* 表单 */
.form-card { max-width: 620px; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 38px 34px; box-shadow: var(--shadow); }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; color: var(--ink-light); margin-bottom: 6px; }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--line); border-radius: 6px;
  font-size: 15px; font-family: inherit; background: #fff; color: var(--ink); transition: .2s;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(22,64,91,.1);
}
.msg-tip { text-align: center; font-size: 14px; margin-top: 14px; min-height: 20px; }
.msg-ok { color: #2e7d32; }
.msg-err { color: #c0392b; }

.contact-info { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 900px; margin: 0 auto 50px; }
@media (max-width: 800px) { .contact-info { grid-template-columns: 1fr; } }
.contact-info .item { text-align: center; padding: 26px 16px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
.contact-info .item .icon { font-size: 26px; margin-bottom: 8px; }
.contact-info .item .label { font-size: 13px; color: var(--ink-light); margin-bottom: 4px; }
.contact-info .item .value { font-size: 15px; color: var(--ink); font-weight: 600; }

/* 登录页 */
.login-wrap { min-height: calc(100vh - 64px); display: flex; align-items: center; justify-content: center; padding: 40px 20px;
  background: linear-gradient(160deg, #f2efe8 0%, var(--bg) 60%); }
.login-card { width: 100%; max-width: 400px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 42px 36px; box-shadow: var(--shadow); }
.login-card h2 { text-align: center; color: var(--brand); letter-spacing: 3px; margin-bottom: 6px; }
.login-card .sub { text-align: center; font-size: 13px; color: var(--ink-light); margin-bottom: 28px; }
.otp-row { display: flex; gap: 10px; }
.otp-row input { flex: 1; }
.otp-row button {
  flex: 0 0 110px; border: 1px solid var(--brand); color: var(--brand); background: #fff;
  border-radius: 6px; font-size: 13.5px; cursor: pointer; transition: .2s;
}
.otp-row button:disabled { opacity: .5; cursor: not-allowed; }
.otp-row button:not(:disabled):hover { background: rgba(22,64,91,.06); }
.login-card .btn { width: 100%; margin-top: 6px; }
.login-tip { font-size: 12.5px; color: var(--ink-light); margin-top: 18px; line-height: 1.8; background: #f6f4ee; border-radius: 8px; padding: 12px 14px; }

/* 表格页通用（与首页同一编辑式：左对齐 + 容器约束） */
.page-hero { position: relative; overflow: hidden; background: linear-gradient(135deg, #0e2c40, #2a5f7f); color: #fff; padding: 96px 24px; }
.page-hero.bg-liuxue {
  background:
    linear-gradient(100deg, rgba(14,44,64,.88) 0%, rgba(14,44,64,.6) 55%, rgba(14,44,64,.35) 100%),
    url("img/liuxue.jpg") center 55%/cover no-repeat,
    linear-gradient(135deg, #0e2c40, #2a5f7f);
}
.page-hero.bg-chuhai {
  background:
    linear-gradient(100deg, rgba(14,44,64,.9) 0%, rgba(14,44,64,.62) 55%, rgba(14,44,64,.38) 100%),
    url("img/chuhai.jpg") center/cover no-repeat,
    linear-gradient(135deg, #0e2c40, #2a5f7f);
}
.page-hero h1 { font-size: 40px; letter-spacing: 3px; max-width: 1032px; margin: 0 auto; }
.page-hero p { margin-top: 16px; color: rgba(255,255,255,.82); font-size: 15px; max-width: 1032px; margin-left: auto; margin-right: auto; line-height: 1.9; }

/* 文章资讯 */
.art-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; max-width: 1080px; margin: 0 auto; }
.art-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; text-decoration: none; color: inherit; transition: box-shadow .2s, transform .2s; }
.art-card:hover { box-shadow: 0 8px 24px rgba(14,44,64,.10); transform: translateY(-2px); }
.art-card h3 { color: var(--brand); font-size: 17px; margin-bottom: 8px; line-height: 1.5; }
.art-card p { font-size: 13.5px; color: var(--ink-light); line-height: 1.7; }
.art-cat { display: inline-block; font-size: 12px; color: var(--gold); border: 1px solid var(--gold); border-radius: 10px; padding: 1px 10px; margin-bottom: 10px; }
.art-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 12.5px; color: #9aa5ad; }
.art-more { color: var(--gold); }
.art-detail { max-width: 820px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 40px 44px; }
.art-detail h1 { color: var(--brand); font-size: 26px; line-height: 1.5; margin-bottom: 8px; }
.art-detail .art-meta { justify-content: flex-start; gap: 16px; margin-bottom: 22px; }
.art-content { font-size: 15px; line-height: 1.9; color: var(--ink); word-break: break-word; }
.art-content h1, .art-content h2, .art-content h3, .art-content h4 { color: var(--brand); margin: 22px 0 10px; }
.art-content p { margin-bottom: 12px; }
.art-content ul, .art-content ol { margin: 0 0 12px 22px; }
.art-content img { max-width: 100%; height: auto; border-radius: 8px; margin: 10px 0; }
.art-content a { color: var(--gold); }
.art-content blockquote { border-left: 3px solid var(--gold); background: #f8f6f1; padding: 10px 16px; margin: 12px 0; color: var(--ink-light); }
@media (max-width: 640px) { .art-detail { padding: 26px 20px; } }

/* 隐私告知 */
.privacy-note { font-size: 12.5px; color: #9aa5ad; line-height: 1.7; margin-top: 10px; text-align: left; }
.privacy-note a { color: var(--gold); text-decoration: none; }

/* ---------- 入场编排：错峰揭示（主视觉一次性序列，替代零散微动画） ---------- */
.reveal { opacity: 0; transform: translateY(24px); }
.reveal.in {
  opacity: 1; transform: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .card, .btn, .card::before { transition: none; }
}
@media (max-width: 640px) {
  .page-hero { padding: 70px 20px; }
  .page-hero h1 { font-size: 30px; }
  .quote-block p { font-size: 19px; }
}

/* ---------- 导航下拉（业务板块） ---------- */
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-drop > a::before { content: ""; order: 2; width: 5px; height: 5px; border-right: 1.2px solid currentColor; border-bottom: 1.2px solid currentColor; transform: rotate(45deg) translateY(-2px); opacity: .55; }
.nav-drop-panel {
  position: absolute; top: calc(100% + 10px); left: -12px; min-width: 186px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: var(--shadow-2); padding: 8px; z-index: 80;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility var(--dur-fast);
}
.nav-drop:hover .nav-drop-panel, .nav-drop.open .nav-drop-panel, .nav-drop:focus-within .nav-drop-panel {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-drop-panel a {
  display: block; padding: 9px 12px; font-size: 14px; color: var(--ink-light);
  border-radius: 6px; transition: background .15s, color .15s; white-space: nowrap;
}
.nav-drop-panel a:hover { background: #f6f4ee; color: var(--brand); }
.nav-drop-panel a::after { display: none !important; }
.nav-drop-panel a.active { color: var(--brand); font-weight: 600; background: #f6f4ee; }

/* ---------- 版面扩展 ---------- */
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 800px) { .grid-4 { grid-template-columns: 1fr; } }

.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.split.reverse > div:first-child { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 28px; } .split.reverse > div:first-child { order: 0; } }
.split h2 { font-size: 30px; color: var(--brand); letter-spacing: 1.5px; line-height: 1.4; margin-bottom: 18px; }
.split p { color: var(--ink-light); font-size: 15px; line-height: 1.95; margin-bottom: 14px; }
.split .eyebrow { font-size: 12px; letter-spacing: 4px; color: var(--gold); font-family: Georgia, serif; margin-bottom: 12px; }
.split-figure { background: linear-gradient(140deg, #10334a, #245a78); border-radius: 4px; min-height: 300px; position: relative; overflow: hidden; display: flex; align-items: flex-end; padding: 28px; }
.split-figure::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 80% 15%, rgba(184,146,74,.28), transparent 58%); }
.split-figure .cap { position: relative; color: rgba(255,255,255,.9); font-family: var(--font-display); font-size: 21px; letter-spacing: 3px; line-height: 1.6; }

.board { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 30px 26px 26px; position: relative; overflow: hidden; transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out); }
.board:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.board .no { font-family: Georgia, serif; font-size: 13px; letter-spacing: 3px; color: var(--gold); margin-bottom: 14px; }
.board h3 { font-size: 19px; color: var(--brand); letter-spacing: 1px; margin-bottom: 10px; }
.board p { font-size: 14.2px; color: var(--ink-light); line-height: 1.85; }
.board ul { list-style: none; margin: 14px 0 0; padding: 0; }
.board ul li { font-size: 13.6px; color: var(--ink-light); line-height: 1.9; padding-left: 14px; position: relative; }
.board ul li::before { content: ""; position: absolute; left: 0; top: 12px; width: 5px; height: 1px; background: var(--gold); }
.board .go { display: inline-block; margin-top: 16px; font-size: 13.5px; color: var(--gold); text-decoration: none; }
.board .go:hover { text-decoration: underline; }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.pill { font-size: 12.5px; color: var(--brand); border: 1px solid var(--line); background: #fff; border-radius: 20px; padding: 4px 13px; letter-spacing: .5px; }

.cta-band { background: linear-gradient(120deg, #10334a, #1e4e6b); color: #fff; padding: 62px 24px; text-align: center; margin-top: 20px; }
.cta-band h2 { font-size: 28px; letter-spacing: 2px; margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,.78); font-size: 15px; max-width: 620px; margin: 0 auto 26px; line-height: 1.9; }
.cta-band .btn-gold { background: var(--gold); color: #fff; }

.fact-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 30px 0; margin: 8px 0 0; }
@media (max-width: 800px) { .fact-row { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
.fact .k { font-family: var(--font-display); font-size: 26px; color: var(--brand); letter-spacing: 1px; }
.fact .v { font-size: 13px; color: var(--ink-light); margin-top: 4px; letter-spacing: .5px; }

.note-line { font-size: 12.5px; color: #9aa5ad; line-height: 1.8; margin-top: 18px; }

/* ---------- 导航窄屏适配（新增「业务板块」后项数增加，避免溢出） ---------- */
@media (max-width: 980px) {
  .nav-inner { height: auto; padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  .nav-links { flex-wrap: wrap; gap: 2px; }
  .nav-links a { padding: 6px 9px; font-size: 14px; }
  .nav-links a:not(.btn-login)::after { left: 9px; right: 9px; }
  .nav-links a.btn-login { margin-left: 4px; }
  .lang-select { margin-left: 6px; }
  .nav-drop-panel { left: 0; min-width: 168px; }
}

/* ---------- 两部专著：书封卡片（brand.html） ---------- */
.book-card {
  display: grid; grid-template-columns: 200px 1fr; gap: 26px; align-items: start;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 28px 26px; transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.book-cover { margin: 0; perspective: 1100px; }
.book-flip {
  position: relative; transform-style: preserve-3d;
  transition: transform .65s var(--ease-out);
}
@media (hover: hover) {
  .book-card:hover .book-flip { transform: rotateY(180deg); }
}
.book-flip.flipped { transform: rotateY(180deg); }
.book-face {
  position: relative; border-radius: 3px;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.book-face img {
  display: block; width: 100%; height: auto; border-radius: 3px;
  box-shadow: 6px 8px 22px rgba(22, 64, 91, .28);
}
.book-face.back { position: absolute; inset: 0; transform: rotateY(180deg); }
.book-face.back img { width: 100%; height: 100%; object-fit: cover; }
.book-face.front::before {
  /* 书脊高光，增强立体感 */
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 7%;
  background: linear-gradient(90deg, rgba(0,0,0,.32), rgba(255,255,255,.10) 55%, rgba(0,0,0,.05));
  z-index: 1; pointer-events: none; border-radius: 3px 0 0 3px;
}
.flip-hint {
  position: absolute; right: 8px; bottom: 8px; z-index: 2;
  font-size: 11.5px; letter-spacing: 1px; color: #fff;
  background: rgba(22, 64, 91, .82); border-radius: 20px; padding: 4px 11px;
  opacity: .88; transition: opacity .2s;
}
.book-flip:hover .flip-hint { opacity: 0; }
.book-flip:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 3px; }
@media (hover: none) { .book-flip { cursor: pointer; } }
.book-info .no { font-family: Georgia, serif; font-size: 12.5px; letter-spacing: 2.5px; color: var(--gold); margin-bottom: 12px; }
.book-info h3 { font-size: 20px; color: var(--brand); letter-spacing: 1px; margin-bottom: 10px; }
.book-info p { font-size: 14.2px; color: var(--ink-light); line-height: 1.85; }
.book-info ul { list-style: none; margin: 14px 0 0; padding: 0; }
.book-info ul li { font-size: 13.6px; color: var(--ink-light); line-height: 1.9; padding-left: 14px; position: relative; }
.book-info ul li::before { content: ""; position: absolute; left: 0; top: 12px; width: 5px; height: 1px; background: var(--gold); }

@media (max-width: 860px) {
  .book-card { grid-template-columns: 150px 1fr; gap: 18px; padding: 20px 18px; }
  .book-info h3 { font-size: 17px; }
}
@media (max-width: 520px) {
  .book-card { grid-template-columns: 1fr; }
  .book-cover { max-width: 210px; }
}

/* ---------- 页脚「会员登录」入口（2026-10 由顶部导航下移） ---------- */
.footer-cta {
  max-width: 1080px; margin: 0 auto; padding: 0 24px 24px;
  display: flex; justify-content: flex-end;
}
.footer a.footer-login {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 24px; border: 1px solid rgba(184, 146, 74, .6);
  border-radius: 24px; color: var(--gold); font-size: 14px;
  letter-spacing: 1.5px; padding-top: 10px; padding-bottom: 10px;
  transition: background .22s var(--ease-out), color .22s, border-color .22s;
}
.footer a.footer-login::after {
  content: "→"; font-family: Georgia, serif; transition: transform .22s var(--ease-out);
}
.footer a.footer-login:hover {
  background: var(--gold); border-color: var(--gold); color: #fff;
}
.footer a.footer-login:hover::after { transform: translateX(4px); }
@media (max-width: 800px) {
  .footer-cta { justify-content: flex-start; padding-bottom: 20px; }
}

/* ---------- 导航扁平化（业务板块四项横向展开，2026-10 起弃用下拉） ---------- */
.nav-links { gap: 2px; }
.nav-links a { padding: 6px 12px; font-size: 14.5px; letter-spacing: .3px; }
.nav-links a:not(.btn-login)::after { left: 12px; right: 12px; }
@media (max-width: 1100px) {
  .nav-inner { padding: 0 16px; }
  .nav-links a { padding: 6px 9px; font-size: 14px; }
  .nav-links a:not(.btn-login)::after { left: 9px; right: 9px; }
  .logo { gap: 10px; }
  .logo-img { width: 42px; height: 42px; }
  .logo-text { font-size: 20px; }
  .logo-text small { font-size: 9.8px; letter-spacing: 1.5px; }
  .lang-select { font-size: 13px; }
}
@media (max-width: 700px) {
  .nav-inner { height: auto; padding: 12px 14px; }
  .logo-img { width: 38px; height: 38px; }
  .logo-text { font-size: 18.5px; letter-spacing: 2px; }
  .logo-text small { font-size: 9.2px; letter-spacing: 1.3px; }
}

/* ---------- 金色文字统一加粗（2026-10-28） ---------- */
/* 频道页眉标：加粗并略收字距，避免加粗后显得松散 */
.section-head .eyebrow,
.split .eyebrow { font-weight: 600; letter-spacing: 3.2px; }
/* 频道页编号（01 / 02 / 著作 01）：数字用实心粗体，识别度最高 */
.board .no,
.book-info .no { font-weight: 700; }
/* 频道页卡片链接 */
.board .go { font-weight: 600; }
/* 文章：分类标签 / 阅读全文 / 正文链接；页脚登录入口 */
.art-cat,
.art-more,
.art-content a,
.privacy-note a,
.footer a.footer-login { font-weight: 600; }
/* 正文链接加下划线偏移，加粗后更易识别 */
.art-content a { text-decoration-thickness: 1px; text-underline-offset: 2px; }

/* ---------- 页脚友情链接（数据来自后台「友情链接」，默认空则整块隐藏） ---------- */
.footer-links {
  max-width: 1080px; margin: 0 auto; padding: 0 24px 22px;
  display: flex; align-items: baseline; gap: 8px 22px; flex-wrap: wrap;
}
.footer-links[hidden] { display: none; }
.footer-links-title {
  flex: none; position: relative; padding-right: 16px;
  font-size: 12.5px; letter-spacing: 2px; color: var(--gold); font-weight: 600;
}
.footer-links-title::after {
  content: ""; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 1px; height: 12px; background: rgba(184, 146, 74, .45);
}
.footer-links-list { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 0; padding: 0; }
.footer-links-list li { margin: 0; }
.footer .footer-links-list a {
  display: inline; padding: 0; font-size: 13px; color: rgba(255, 255, 255, .62);
  border-bottom: 1px solid transparent; transition: color .2s var(--ease-out), border-color .2s var(--ease-out);
}
.footer .footer-links-list a:hover { color: var(--gold); border-bottom-color: var(--gold); }
@media (max-width: 800px) {
  .footer-links { padding: 0 18px 18px; gap: 6px 16px; }
  .footer-links-list { gap: 6px 16px; }
  .footer-links-title { width: 100%; padding-right: 0; }
  .footer-links-title::after { display: none; }
}

/* ---------- 联系我们 · 常见问题（由后台 GEO 配置生成，SEO/GEO 双重用途） ---------- */
.ctw-faq-wrap { margin-top: 52px; }
.ctw-faq-wrap:empty { display: none; }
.ctw-faq-h {
  font-family: var(--font-display); font-size: 25px; color: var(--brand);
  letter-spacing: 2px; margin-bottom: 20px;
}
.ctw-faq-list { border-top: 1px solid var(--line); }
.ctw-faq-item { border-bottom: 1px solid var(--line); }
.ctw-faq-item summary {
  cursor: pointer; padding: 17px 30px 17px 0; font-size: 15.5px; font-weight: 600;
  color: var(--brand); list-style: none; position: relative; transition: color .2s var(--ease-out);
}
.ctw-faq-item summary::-webkit-details-marker { display: none; }
.ctw-faq-item summary::after {
  content: "＋"; position: absolute; right: 4px; top: 15px;
  color: var(--gold); font-weight: 400; font-size: 15px;
}
.ctw-faq-item[open] summary::after { content: "－"; }
.ctw-faq-item summary:hover { color: var(--gold); }
.ctw-faq-a {
  padding: 0 0 20px; font-size: 14.5px; line-height: 1.95; color: var(--ink-light);
  max-width: 780px;
}
@media (max-width: 800px) {
  .ctw-faq-wrap { margin-top: 36px; }
  .ctw-faq-h { font-size: 21px; }
  .ctw-faq-item summary { font-size: 14.5px; padding: 14px 28px 14px 0; }
}

/* ---------- 文章板块筛选 / 推荐位 / 业务页联动 ---------- */
.art-tabs { display: flex; flex-wrap: wrap; gap: 8px; max-width: 1080px; margin: 0 auto 24px; }
.art-tab {
  font-size: 13.5px; padding: 7px 16px; border: 1px solid var(--line); border-radius: 20px;
  color: var(--ink-light); text-decoration: none; background: #fff;
  transition: border-color .2s, color .2s, background .2s;
}
.art-tab:hover { border-color: var(--gold); color: var(--gold); }
.art-tab.on { background: var(--brand); border-color: var(--brand); color: #fff; }

.art-tags { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; }
.art-tags .art-cat { margin-bottom: 0; }
.art-pin {
  display: inline-block; font-size: 11.5px; background: var(--brand); color: #fff;
  border-radius: 10px; padding: 1px 9px; letter-spacing: .5px;
}
.art-pin.top { background: var(--gold); }

.art-section { max-width: 1080px; }
.art-sec-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 20px; border-bottom: 1px solid var(--line); padding-bottom: 12px;
}
.art-sec-head h2 {
  font-family: var(--font-display); font-size: 24px; color: var(--brand); letter-spacing: 1px;
}
.art-sec-more { font-size: 13.5px; color: var(--gold); text-decoration: none; }
.art-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }

.art-source {
  margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 13px; color: var(--ink-light); line-height: 1.8;
}
.art-source a { color: var(--gold); }

@media (max-width: 800px) {
  .art-tab { font-size: 12.5px; padding: 6px 13px; }
  .art-sec-head h2 { font-size: 20px; }
}