/* ==========================================================================
   笔趣阁官网 · v3 设计系统 —— 杂志风 / 简约大气
   纸感米白 + 墨黑 + 细分割线 + 衬线标题
   色板取自 Anthropic 品牌规范：橙 #d97757 / 蓝 #6a9bcc / 绿 #788c5d
   字体：标题 Noto Serif SC（衬线）/ 正文 Noto Sans SC / 西文数字 Lora
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  /* 墨与纸 */
  --ink: #10161B;
  --ink-soft: #232A31;
  --body: #4A545C;
  --muted: #8B959D;
  --gray: #B4BCC2;
  --line: #E3EAEF;
  --line-soft: #EFF4F8;
  --paper: #FBFCFD;
  --paper-2: #F1F6FA;
  --white: #FFFFFF;

  /* 品牌色：LOGO 蓝 */
  --brand: #1497DB;
  --brand-deep: #0F7FC0;
  --brand-dark: #0B4D74;
  --brand-soft: #EAF6FD;
  --accent: #1497DB;
  --accent-deep: #0F7FC0;
  --accent-2: #6CC5F2;
  --accent-3: #1497DB;
  --accent-soft: #EAF6FD;

  /* 布局 */
  --maxw: 1180px;
  --nav-h: 72px;

  /* 杂志感：近乎直角 */
  --r: 2px;
  --r-lg: 4px;

  /* 阴影：克制 */
  --shadow-sm: 0 1px 2px rgba(20, 20, 19, .04);
  --shadow-md: 0 24px 48px -28px rgba(20, 20, 19, .28);
  --shadow-lg: 0 40px 90px -40px rgba(20, 20, 19, .45);

  /* 字体 */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --font-latin: "Lora", Georgia, "Times New Roman", serif;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

::selection { background: var(--accent-soft); color: var(--ink); }

/* ---------- 排版原子 ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--accent);
}
.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -.01em;
}

.section-desc {
  font-size: 16px;
  line-height: 1.95;
  color: var(--body);
}

.section-head { max-width: 760px; margin-bottom: clamp(48px, 6vw, 72px); }
.section-head .kicker { margin-bottom: 22px; }
.section-head .section-desc { margin-top: 20px; }

.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .kicker { justify-content: center; }

.rule { height: 1px; background: var(--line); border: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 54px;
  padding: 0 30px;
  border-radius: var(--r);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  cursor: pointer;
  background: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:active { transform: translateY(1px); }

.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--ink-soft); }

.btn--accent { background: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-deep); }

.btn--line { border-color: var(--ink); color: var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--paper); }

.btn--sm { height: 42px; padding: 0 20px; font-size: 14px; }

/* ---------- 导航 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(250, 249, 245, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.navbar__inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 40px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 34px; height: 34px; border-radius: var(--r); }
.brand__name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .08em;
}

.nav { display: flex; gap: 30px; margin-left: auto; }
.nav a {
  position: relative;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--body);
  padding: 4px 0;
  transition: color .2s ease;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav a.active { color: var(--ink); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--white);
  cursor: pointer;
  padding: 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 16px; height: 1px;
  background: var(--ink);
  margin: 0 auto;
  position: relative;
}
.nav-toggle span::before { content: ""; position: absolute; top: -5px; left: 0; }
.nav-toggle span::after { content: ""; position: absolute; top: 5px; left: 0; }

/* ---------- 区块节奏 ---------- */
.section { padding: clamp(72px, 8vw, 128px) 0; }
.section--paper {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section--tight { padding-top: 0; }

/* ---------- Hero ---------- */
.hero { padding: clamp(56px, 7vw, 100px) 0 clamp(64px, 8vw, 116px); }
.hero__inner {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: clamp(40px, 5vw, 92px);
  align-items: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--muted);
}
.hero__eyebrow::before { content: ""; width: 32px; height: 1px; background: var(--accent); }

.hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(42px, 5.8vw, 76px);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin-top: 28px;
}
.hero__subtitle {
  margin-top: 28px;
  max-width: 30em;
  font-size: 17px;
  line-height: 1.95;
  color: var(--body);
}
.hero__actions { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero__meta {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
}

.hero__figure { display: flex; flex-direction: column; align-items: center; }

/* 手机样机（内页为书籍封面） */
.phone {
  position: relative;
  width: min(290px, 74vw);
  aspect-ratio: 290 / 596;
  padding: 9px;
  border-radius: 38px;
  background: var(--ink);
  box-shadow: var(--shadow-lg);
}
.phone__screen {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 30px;
  overflow: hidden;
  background: #0d0d0c;
}
.phone__cover { width: 100%; height: 100%; object-fit: cover; }
.phone__bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  font-size: 12px;
  color: #fff;
  background: linear-gradient(180deg, rgba(0, 0, 0, .58), rgba(0, 0, 0, 0));
}
.phone__bar .tag {
  font-size: 11px;
  letter-spacing: .1em;
  padding: 3px 11px;
  border: 1px solid rgba(255, 255, 255, .55);
  border-radius: 999px;
}

.figure-cap {
  margin-top: 22px;
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
  text-align: center;
}

/* ---------- 数据条 ---------- */
.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stats__inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 46px 32px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; padding-left: 0; }
.stat__num {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
}
.stat__label {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* ---------- 编号式能力栅格 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 44px 40px; }
.cap-item { border-top: 1px solid var(--ink); padding-top: 26px; }
.cap-item__num {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}
.cap-item__title {
  margin-top: 20px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
}
.cap-item__desc { margin-top: 12px; font-size: 15px; line-height: 1.9; color: var(--body); }

/* ---------- 阅读体验（左文右图） ---------- */
.exp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 5vw, 88px);
  align-items: center;
}
.exp__title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-top: 22px;
}
.exp__desc { margin-top: 20px; font-size: 16px; line-height: 1.95; color: var(--body); }
.exp__list { margin-top: 38px; border-top: 1px solid var(--line); }
.exp__item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}
.exp__item b {
  font-family: var(--font-latin);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--accent);
  flex: none;
}

.exp__visual { display: grid; gap: 20px; }

.shelf {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 32px 32px 24px;
}
.shelf__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink);
}
.shelf__title { font-family: var(--font-serif); font-size: 18px; font-weight: 700; letter-spacing: .04em; }
.shelf__note { font-size: 12px; letter-spacing: .1em; color: var(--muted); }
.shelf__row { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
.shelf__row:last-child { border-bottom: none; }
.shelf__cover { width: 42px; height: 58px; object-fit: cover; border-radius: var(--r); border: 1px solid var(--line); flex: none; }
.shelf__name { font-size: 15px; font-weight: 600; }
.shelf__meta { margin-top: 3px; font-size: 12px; letter-spacing: .06em; color: var(--muted); }

.night-note {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 26px 28px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
}
.night-note__icon { flex: none; width: 22px; height: 22px; margin-top: 3px; }
.night-note__title { font-family: var(--font-serif); font-size: 16px; font-weight: 700; letter-spacing: .04em; }
.night-note__desc { margin-top: 8px; font-size: 14px; line-height: 1.85; color: rgba(250, 249, 245, .72); }

/* ---------- 书城分类（杂志目录式） ---------- */
.cat-index {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(32px, 5vw, 72px);
  border-top: 1px solid var(--ink);
}
.cat-row {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: baseline;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .25s ease;
}
.cat-row:hover { padding-left: 10px; }
.cat-row__no {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
  transition: color .25s ease;
}
.cat-row:hover .cat-row__no { color: var(--accent); }
.cat-row__body { min-width: 0; }
.cat-row__name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: color .25s ease;
}
.cat-row:hover .cat-row__name { color: var(--accent); }
.cat-row__desc { margin-top: 6px; font-size: 14px; line-height: 1.75; color: var(--body); }
.cat-row__count {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  white-space: nowrap;
}

.cover-strip {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 22px;
}
.cover-strip figure { display: flex; flex-direction: column; gap: 12px; }
.cover-strip img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--white);
  transition: transform .35s ease, box-shadow .35s ease;
}
.cover-strip figure:hover img { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.cover-strip figcaption {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  text-align: center;
}

/* ---------- 深色 CTA ---------- */
.cta {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(72px, 8vw, 120px) 0;
}
.cta__inner { max-width: 720px; margin: 0 auto; padding: 0 32px; text-align: center; }
.cta__title {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -.01em;
}
.cta__desc { margin-top: 22px; font-size: 16px; line-height: 1.9; color: rgba(250, 249, 245, .68); }
.cta .btn { margin-top: 38px; }
.cta__meta {
  margin-top: 26px;
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(250, 249, 245, .5);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: clamp(56px, 6vw, 88px) 0 36px;
}
.footer__top {
  display: flex;
  justify-content: space-between;
  gap: 64px;
  flex-wrap: wrap;
}
.footer__logo { display: flex; align-items: center; gap: 12px; }
.footer__logo img { width: 30px; height: 30px; border-radius: var(--r); }
.footer__logo strong { font-family: var(--font-serif); font-size: 18px; font-weight: 700; letter-spacing: .08em; }
.footer__tagline { margin-top: 16px; font-size: 14px; color: var(--muted); max-width: 22em; }

.footer__cols { display: flex; gap: clamp(48px, 8vw, 120px); }
.footer__col h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--muted);
  margin-bottom: 20px;
}
.footer__col ul { display: grid; gap: 12px; }
.footer__col a { font-size: 14px; color: var(--body); transition: color .2s ease; }
.footer__col a:hover { color: var(--accent); }

.footer__legal {
  margin-top: clamp(48px, 5vw, 64px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 内页页头 ---------- */
.page-hero {
  padding: clamp(56px, 7vw, 96px) 0 clamp(44px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}
.page-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.4vw, 58px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
}
.page-hero__desc {
  margin-top: 24px;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--body);
}
.page-hero__meta {
  margin-top: 28px;
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* 内页页头：图文分栏（与首页 Hero 同构） */
.page-hero--split { padding-bottom: clamp(56px, 7vw, 96px); }
.page-hero__inner {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: clamp(40px, 5vw, 80px);
  align-items: center;
}

/* 封面扇形图版 */
.cover-fan { display: flex; flex-direction: column; align-items: center; }
.cover-fan__stack {
  position: relative;
  width: min(340px, 92vw);
  height: 272px;
}
.cover-fan__stack img {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 160px;
  height: 230px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--white);
  box-shadow: var(--shadow-md);
  transition: transform .45s ease;
}
.cover-fan__stack img:nth-child(1) { transform: translateX(-50%) translateX(-80px) rotate(-9deg); }
.cover-fan__stack img:nth-child(2) { transform: translateX(-50%); z-index: 2; }
.cover-fan__stack img:nth-child(3) { transform: translateX(-50%) translateX(80px) rotate(9deg); }
.cover-fan__stack:hover img:nth-child(1) { transform: translateX(-50%) translateX(-96px) rotate(-12deg); }
.cover-fan__stack:hover img:nth-child(3) { transform: translateX(-50%) translateX(96px) rotate(12deg); }

/* ---------- 下载页 ---------- */
.dl-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 48px;
  border: 1px solid var(--ink);
  background: var(--white);
}
.dl-card__left { display: flex; flex-direction: column; gap: 26px; }
.dl-card__app { display: flex; align-items: center; gap: 18px; }
.dl-card__icon { width: 68px; height: 68px; border-radius: var(--r); }
.dl-card__name { font-family: var(--font-serif); font-size: 24px; font-weight: 700; letter-spacing: .06em; }
.dl-card__ver { margin-top: 6px; font-family: var(--font-latin); font-size: 13px; letter-spacing: .1em; color: var(--muted); }
.dl-card__spec {
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--body);
}
.dl-card__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .14em;
  line-height: 1.7;
}
.tag--light { color: rgba(250, 249, 245, .8); }
.tag--accent { color: var(--accent); }

/* ---------- 下载地址列表 ---------- */
.dl-links { border-top: 1px solid var(--ink); }
.dl-link {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.dl-link__no {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gray);
}
.dl-link__body { min-width: 0; }
.dl-link__title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
}
.dl-link__url {
  margin-top: 8px;
  font-family: var(--font-latin);
  font-size: 13px;
  color: var(--muted);
  word-break: break-all;
}
.dl-link__action { flex: none; }
.dl-card__qr { display: flex; flex-direction: column; align-items: center; gap: 14px; flex: none; }
.dl-card__qrbox {
  width: 148px; height: 148px;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.dl-card__qrbox svg, .dl-card__qrbox img { width: 100%; height: 100%; }
.dl-card__qrtext { font-size: 12px; letter-spacing: .12em; color: var(--muted); }

/* ---------- 编号步骤 ---------- */
.step-list { border-top: 1px solid var(--ink); }
.step {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}
.step__no {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}
.step__title { font-family: var(--font-serif); font-size: 20px; font-weight: 700; }
.step__desc { margin-top: 10px; font-size: 15px; line-height: 1.9; color: var(--body); max-width: 46em; }
.step__tip {
  margin-top: 14px;
  padding: 12px 16px;
  border-left: 2px solid var(--accent-2);
  background: var(--paper);
  font-size: 14px;
  line-height: 1.8;
  color: var(--body);
}
.step__tip b { color: var(--ink); font-weight: 600; }

/* ---------- 规格表 ---------- */
.spec-table { border-top: 1px solid var(--ink); }
.spec-table .row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.spec-table dt { font-size: 14px; letter-spacing: .08em; color: var(--muted); }
.spec-table dd { font-size: 15px; color: var(--ink); font-weight: 500; }

/* ---------- 双栏面板 ---------- */
.two-col { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: start; }
.panel {
  padding: 36px 36px 32px;
  border: 1px solid var(--line);
  background: var(--white);
}
.panel--ink { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.panel--ink .panel__title { color: var(--paper); }
.panel--ink .panel__text { color: rgba(250, 249, 245, .72); }
.panel--ink .panel__ver, .panel--ink .panel__date { color: rgba(250, 249, 245, .5); }
.panel__title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
}
.panel__ver {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--accent);
}
.panel__text { margin-top: 20px; font-size: 15px; line-height: 1.95; color: var(--body); }
.panel__date {
  display: block;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}
.panel--ink .panel__date { border-top-color: rgba(250, 249, 245, .16); }

.perm-list { margin-top: 22px; display: grid; gap: 12px; }
.perm-list li { font-size: 14px; line-height: 1.8; color: var(--body); padding-left: 18px; position: relative; }
.perm-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .82em;
  width: 8px; height: 1px;
  background: var(--gray);
}

/* ---------- 通用卡片栅格 ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }

.note-card {
  display: flex;
  flex-direction: column;
  padding: 30px 28px 32px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color .25s ease, transform .25s ease;
}
.note-card:hover { border-color: var(--ink); transform: translateY(-3px); }
.note-card__num {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}
.note-card__title {
  margin-top: 18px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
}
.note-card__desc { margin-top: 12px; font-size: 15px; line-height: 1.9; color: var(--body); }
.note-card__label { font-size: 12px; letter-spacing: .16em; color: var(--muted); }
.note-card__value {
  margin-top: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  word-break: break-all;
}

/* ---------- FAQ ---------- */
.faq { max-width: 860px; margin: 0 auto; border-top: 1px solid var(--ink); }
.faq-item { padding: 28px 0; border-bottom: 1px solid var(--line); }
.faq-item__q { font-family: var(--font-serif); font-size: 18px; font-weight: 700; }
.faq-item__a { margin-top: 12px; font-size: 15px; line-height: 1.95; color: var(--body); }

/* ---------- 长文（协议页 / 品牌介绍） ---------- */
.doc { max-width: 820px; margin: 0 auto; padding: 0 32px; }
.doc > h2 {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .02em;
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.doc > h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.doc__head { margin-bottom: 34px; }
.doc p { margin-top: 16px; font-size: 16px; line-height: 2.05; color: var(--body); }
.doc ul { margin-top: 18px; display: grid; gap: 10px; }
.doc ul li { padding-left: 18px; position: relative; font-size: 15px; line-height: 1.95; color: var(--body); }
.doc ul li::before {
  content: "";
  position: absolute;
  left: 0; top: .82em;
  width: 8px; height: 1px;
  background: var(--gray);
}
.doc__lead::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-size: 52px;
  line-height: .92;
  font-weight: 700;
  margin: 8px 14px 0 0;
  color: var(--ink);
}
.doc__date {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--ink);
  font-family: var(--font-latin);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 56px; }
  .hero__figure { order: -1; }
  .page-hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .page-hero__inner .cover-fan { order: -1; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: 1px solid var(--line); padding-left: 28px; }
  .stat:nth-child(odd) { border-left: none; padding-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .exp { grid-template-columns: 1fr; gap: 56px; }
  .two-col { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .cover-strip { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .cat-index { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .doc { padding: 0 20px; }
  .nav { display: none; }
  .navbar .btn--sm { display: none; }
  .nav-toggle { display: block; margin-left: auto; }

  .nav.open {
    display: flex;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    margin: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }
  .nav.open a { width: 100%; padding: 16px 20px; border-bottom: 1px solid var(--line-soft); }
  .nav.open a::after { display: none; }
  .nav.open a.active { color: var(--accent); }

  .grid-4, .grid-2, .cap-grid { grid-template-columns: 1fr; }
  .cover-strip { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .dl-card { flex-direction: column; align-items: stretch; gap: 32px; padding: 32px 24px; }
  .dl-card__qr { flex-direction: row; justify-content: flex-start; gap: 18px; }
  .dl-link { grid-template-columns: 1fr; gap: 16px; }
  .dl-link__action { justify-self: start; }
  .step { grid-template-columns: 1fr; gap: 14px; }
  .spec-table .row { grid-template-columns: 1fr; gap: 4px; }
  .footer__top { flex-direction: column; gap: 40px; }
  .footer__cols { gap: 48px; }
  .cta__inner { padding: 0 20px; }
}

/* ==========================================================================
   品牌蓝统一 —— 以 LOGO 蓝 #1497DB 为主色调，去除所有黑色块
   ========================================================================== */

/* 标题：以墨黑为主（水墨的"墨"），蓝只作点睛 */
.hero__title,
.section-title,
.page-hero__title,
.exp__title,
.cap-item__title,
.note-card__title,
.step__title,
.faq-item__q,
.dl-link__title,
.cat-row__name,
.dl-card__name,
.panel__title,
.shelf__title,
.brand__name,
.doc > h2 { color: var(--ink); }

/* 蓝色点睛之处 */
.stat__num,
.doc__lead::first-letter { color: var(--brand); }
.hero__title em,
.page-hero__title em,
.section-title em { font-style: normal; color: var(--brand); }

/* 强分割线改为品牌蓝 */
.cap-item,
.cat-index,
.dl-links,
.faq,
.step-list,
.doc__date { border-top-color: var(--brand); }
.shelf__head { border-bottom-color: var(--brand); }
.dl-card { border-color: var(--brand); }

/* 按钮统一为品牌蓝 */
.btn--ink { background: var(--brand); color: #fff; }
.btn--ink:hover { background: var(--brand-deep); }
.btn--line { border-color: var(--brand); color: var(--brand); }
.btn--line:hover { background: var(--brand); color: #fff; border-color: var(--brand); }

/* 深色块改蓝 */
.cta { background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%); }
.panel--ink { background: var(--brand); border-color: var(--brand); }
.panel--ink .panel__ver { color: rgba(255, 255, 255, .85); }
.night-note { background: var(--brand); border-color: var(--brand); }

/* 手机边框改深蓝 */
.phone { background: #0E3550; }

/* 顶栏随纸色 */
.navbar { background: rgba(251, 252, 253, .86); }

/* 页脚深蓝 */
.footer { background: var(--brand-dark); border-top: none; }
.footer__logo img { box-shadow: 0 0 0 1px rgba(255, 255, 255, .22); }
.footer__logo strong { color: #fff; }
.footer__tagline { color: rgba(255, 255, 255, .72); }
.footer__col h4 { color: rgba(255, 255, 255, .58); }
.footer__col a { color: rgba(255, 255, 255, .84); }
.footer__col a:hover { color: #fff; }
.footer__legal { color: rgba(255, 255, 255, .6); border-top-color: rgba(255, 255, 255, .18); }

/* ==========================================================================
   水墨点缀 —— 晕染与飞白，克制使用，不喧宾夺主
   ========================================================================== */

/* 小标签前的笔触：由虚到实的飞白 */
.kicker::before {
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(20, 151, 219, 0) 0%, rgba(20, 151, 219, .5) 45%, var(--brand) 100%);
}

/* 首页首屏：右上方一团淡墨 */
.hero,
.cta { position: relative; overflow: hidden; }
.hero::after,
.cta::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  top: -20%; right: -8%;
  width: 48vw; height: 48vw;
  max-width: 680px; max-height: 680px;
  background:
    radial-gradient(circle at 46% 46%, rgba(20, 151, 219, .12), rgba(20, 151, 219, 0) 60%),
    radial-gradient(circle at 64% 70%, rgba(16, 22, 27, .05), rgba(16, 22, 27, 0) 58%);
  filter: blur(6px);
}
.hero__inner,
.cta__inner { position: relative; z-index: 1; }

/* 深蓝 CTA：一层白色晕染，像墨落纸上的洇开 */
.cta::after {
  inset: -44% -12% auto auto;
  width: 62vw; height: 62vw;
  max-width: 780px; max-height: 780px;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, .16), rgba(255, 255, 255, 0) 62%);
  filter: blur(4px);
}

/* 浅色区块：左下角淡墨晕 */
.section--paper { position: relative; overflow: hidden; }
.section--paper::after {
  content: "";
  position: absolute;
  left: -12%; bottom: -36%;
  width: 46vw; height: 46vw;
  max-width: 620px; max-height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 151, 219, .075), rgba(20, 151, 219, 0) 66%);
  filter: blur(6px);
  pointer-events: none;
}
.section--paper > .container { position: relative; z-index: 1; }

/* ==========================================================================
   字体分层：宋（大标题）· 黑（小标题）· 系统默认（正文与点缀）
   ========================================================================== */
:root {
  --font-hei: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

/* 小标题 → 黑体 */
.cap-item__title,
.note-card__title,
.step__title,
.faq-item__q,
.dl-link__title,
.cat-row__name,
.dl-card__name,
.panel__title,
.shelf__title {
  font-family: var(--font-hei);
  font-weight: 700;
  letter-spacing: .01em;
}

/* ==========================================================================
   减线条：去掉装饰性边框，改用留白、浅底与极轻阴影来分区
   ========================================================================== */
.section--paper { border-top: none; border-bottom: none; }
.page-hero { border-bottom: none; }

.stats { border-top: none; border-bottom: none; }
.stat { border-left: none; padding: 40px 24px 40px 0; }
.stat:first-child { padding-left: 0; }

.cap-item { border-top: none; padding-top: 0; }
.cap-item__num { display: inline-block; margin-bottom: 4px; }

.exp__list { border-top: none; }
.exp__item { border-bottom: none; padding: 12px 0; }

.shelf { border: none; box-shadow: var(--shadow-md); }
.shelf__head { border-bottom: none; padding-bottom: 6px; }
.shelf__row { border-bottom: none; padding: 12px 0; }
.shelf__cover { border: none; }
.night-note { border: none; }

.cat-index { border-top: none; }
.cat-row { border-bottom: none; padding: 16px 12px; border-radius: var(--r-lg); }
.cat-row:hover { background: var(--brand-soft); }

.cover-strip { border-top: none; padding-top: 0; }
.cover-strip img { border: none; box-shadow: var(--shadow-md); }
.cover-fan__stack img { border: none; }

.dl-card { border: none; box-shadow: var(--shadow-md); }
.dl-card__spec { border-top: none; padding-top: 0; }
.dl-card__qrbox { border: none; background: var(--paper-2); }

.step-list { border-top: none; }
.step__tip { border-left: none; background: var(--brand-soft); border-radius: var(--r); }

.spec-table { border-top: none; }

.two-col .panel { border: none; box-shadow: var(--shadow-md); }
.panel--ink { border: none; }
.panel__date { border-top: none; padding-top: 0; }

.note-card { border: none; background: var(--white); box-shadow: var(--shadow-md); }
.note-card:hover { border-color: transparent; background: var(--brand-soft); box-shadow: var(--shadow-md); }

.faq { border-top: none; }
.faq-item { border-bottom: none; padding: 22px 0; }

.doc > h2 { border-top: none; padding-top: 0; margin-top: 44px; }
.doc__date { border-top: none; padding-top: 0; }

.footer__legal { border-top: none; padding-top: 0; margin-top: 48px; }

/* ==========================================================================
   统计看板
   ========================================================================== */
.dash-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.range-tabs {
  display: inline-flex;
  padding: 4px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
}
.range-tabs button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--body);
  padding: 10px 22px;
  border-radius: var(--r);
  transition: background .2s ease, color .2s ease;
}
.range-tabs button:hover { color: var(--brand); }
.range-tabs button.active { background: var(--brand); color: #fff; }

.dash-status {
  font-family: var(--font-latin);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.kpi {
  padding: 26px 26px 22px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
  border-top: 3px solid var(--brand);
}
.kpi__label { font-size: 13px; letter-spacing: .12em; color: var(--muted); }
.kpi__value {
  margin-top: 14px;
  font-family: var(--font-latin);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.05;
  color: var(--brand);
}
.kpi__unit { font-size: 13px; margin-left: 5px; color: var(--muted); }
.kpi__sub { margin-top: 12px; font-family: var(--font-latin); font-size: 12px; letter-spacing: .06em; color: var(--muted); }

.card {
  padding: 28px 28px 24px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
}
.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}
.card__title { font-family: var(--font-hei); font-size: 17px; font-weight: 700; }
.card__note { font-size: 12px; letter-spacing: .1em; color: var(--muted); }

.dash-block { margin-top: 20px; }
.dash-cols { display: grid; grid-template-columns: 1.4fr .6fr; gap: 20px; margin-top: 20px; align-items: start; }
.dash-stack { display: grid; gap: 20px; }

.chart svg { display: block; width: 100%; height: auto; }
.chart-legend { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 14px; }
.chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--body);
}
.chart-legend i { width: 10px; height: 10px; border-radius: 2px; display: block; }

.bar-list { display: grid; gap: 16px; }
.bar-item { display: grid; grid-template-columns: 1fr auto; gap: 6px 14px; align-items: baseline; }
.bar-item__name { font-size: 14px; }
.bar-item__val { font-family: var(--font-latin); font-size: 13px; color: var(--muted); }
.bar-item__track { grid-column: 1 / -1; height: 6px; border-radius: 999px; background: var(--paper-2); overflow: hidden; }
.bar-item__fill { height: 100%; border-radius: 999px; background: var(--brand); }
.bar-item__fill--alt { background: var(--accent-2); }

.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.data-table th {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--muted);
  text-align: right;
  padding: 0 0 12px;
  white-space: nowrap;
}
.data-table th:first-child { text-align: left; }
.data-table td {
  padding: 13px 0;
  text-align: right;
  font-family: var(--font-latin);
  font-size: 14px;
  color: var(--body);
  border-top: 1px solid var(--line-soft);
  white-space: nowrap;
}
.data-table td:first-child { text-align: left; font-family: var(--font-sans); }
.data-table tbody tr:hover td { background: var(--brand-soft); }
.data-table .is-strong { color: var(--brand); font-weight: 600; }

.notice {
  margin-bottom: 24px;
  padding: 14px 20px;
  border-radius: var(--r-lg);
  background: var(--brand-soft);
  font-size: 14px;
  line-height: 1.8;
  color: var(--body);
}
.notice b { color: var(--brand); }

.empty-state {
  padding: 64px 24px;
  text-align: center;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
}
.empty-state__title { font-family: var(--font-hei); font-size: 18px; font-weight: 700; }
.empty-state__desc { margin-top: 12px; font-size: 14px; line-height: 2; color: var(--body); }
.empty-state code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 13px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--paper-2);
  color: var(--brand-deep);
}

@media (max-width: 1024px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .dash-cols { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .card { padding: 22px 20px 18px; }
  .range-tabs button { padding: 9px 16px; font-size: 13px; }
}