/* 大枝 DAZHI ｜ 品牌网站视觉系统
   生宣米白 / 松烟墨 / 苔绿 / 陈茶金 —— 低饱和、大留白、雅致宋体 */

:root {
  --paper: #F2EEE5;
  --paper-2: #EFEBE1;
  --card: #E7E2D5;
  --card-hover: #E2DCCB;
  --ink: #2F3A33;
  --moss: #7C8B76;
  --gold: #B9A47C;
  --body: #5B645C;
  --muted: #7A8178;
  --stone: #A9A79C;
  --line: #D6D0C1;
  --line-2: #CFC9BA;
  --inverse: #F2EEE5;
  --inverse-dim: #C3CBC0;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --latin: "Noto Serif", "Times New Roman", Georgia, serif;
  --pad: 96px;
  --max: 1440px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 极轻的纸纤维质感，纯 CSS，不依赖外部图片 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: .35;
  background-image:
    repeating-linear-gradient(97deg, rgba(90, 82, 62, .018) 0 1px, transparent 1px 7px),
    repeating-linear-gradient(3deg, rgba(90, 82, 62, .014) 0 1px, transparent 1px 9px);
}

::selection { background: #D8DCCB; color: var(--ink); }

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 5px;
}

img, svg { display: block; max-width: 100%; }

.page {
  max-width: var(--max);
  margin: 0 auto;
  background: var(--paper);
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.header-inner {
  height: 88px;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.brandmark { display: inline-flex; align-items: baseline; gap: 14px; flex-shrink: 0; }
.brandmark .zh {
  font-size: 27px;
  font-weight: 200;
  letter-spacing: 5px;
  line-height: 1;
}
.brandmark .en {
  font-family: var(--latin);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 4.5px;
  color: var(--moss);
}

.site-nav { display: flex; align-items: center; gap: 44px; }
.site-nav a {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--ink);
  padding: 8px 0;
  position: relative;
  transition: color .25s var(--ease);
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.site-nav a:hover { color: var(--moss); }
.site-nav a:hover::after { transform: scaleX(1); }
.site-nav a[aria-current="page"] { color: var(--moss); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1px;
  background: var(--ink);
  position: relative;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px; height: 1px;
  background: var(--ink);
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 3px;
  color: var(--moss);
  margin: 0;
}
.eyebrow.latin { font-family: var(--latin); }
.eyebrow.gold { color: var(--gold); }

.rule { height: 1px; background: var(--line-2); border: 0; margin: 0; }
.rule.short { width: 52px; background: var(--gold); }
.rule.moss { width: 40px; background: var(--moss); }

.section-title {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 4px;
  line-height: 1.6;
  margin: 0;
}
.lead {
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 28px;
  color: var(--body);
  margin: 0;
  max-width: 620px;
}
.link-arrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--moss);
  padding-bottom: 6px;
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.link-arrow:hover { border-bottom-color: var(--moss); transform: translateX(3px); }
.link-arrow .arrow { display: inline-block; margin-left: 8px; }

.section-pad { padding: 96px var(--pad); }

/* ---------- 首屏 ---------- */
.hero {
  display: grid;
  grid-template-columns: 560px minmax(0, 1fr);
  gap: 72px;
  align-items: center;
  padding: 72px var(--pad);
  min-height: 620px;
}
.hero-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 28px; }
.hero-copy .lead { max-width: 470px; }
.hero-mark { display: flex; flex-direction: column; gap: 12px; }
.hero-mark .zh {
  font-size: 92px;
  font-weight: 200;
  letter-spacing: 22px;
  line-height: 1.15;
  margin: 0;
}
.hero-mark .en {
  font-family: var(--latin);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 9px;
  color: var(--gold);
  margin: 0;
  padding-left: 4px;
}
.hero-slogan {
  font-size: 31px;
  font-weight: 300;
  letter-spacing: 8px;
  margin: 0;
}
.hero-visual {
  position: relative;
  height: 452px;
  overflow: hidden;
  background: linear-gradient(118deg, #F2EEE5 0%, #D4D7CA 100%);
}
.hero-visual svg { width: 100%; height: 100%; }

/* ---------- 四味系列 ---------- */
.series { background: var(--paper-2); padding: 104px var(--pad); }
.section-head { display: flex; flex-direction: column; gap: 16px; margin-bottom: 52px; }
.section-head .rule { margin-top: 18px; }
.tea-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.tea-card {
  background: var(--card);
  padding: 32px;
  min-height: 376px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background .35s var(--ease), transform .35s var(--ease);
}
.tea-card:hover { background: var(--card-hover); transform: translateY(-3px); }
.tea-card .num {
  font-family: var(--latin);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--gold);
  margin: 0;
}
.tea-card .glyph {
  font-size: 44px;
  font-weight: 200;
  letter-spacing: 4px;
  line-height: 1.2;
  margin: 0;
}
.tea-card .bar { width: 40px; height: 2px; flex-shrink: 0; }
.tea-card .desc {
  font-size: 13px;
  font-weight: 300;
  letter-spacing: .5px;
  line-height: 25px;
  color: var(--body);
  margin: 0;
  min-height: 52px;
}
.tea-card .axis { width: 100%; max-width: 220px; height: 12px; }
.tea-card .tag {
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--moss);
  margin: auto 0 0;
}

/* ---------- 深色区块（山野志 / 卷首） ---------- */
.dark-section { background: var(--ink); color: var(--inverse); padding: 84px var(--pad); }
.dark-section .eyebrow { color: #A9B4A2; }
.dark-section .display {
  font-size: 46px;
  font-weight: 200;
  letter-spacing: 12px;
  margin: 0;
}
.dark-section .lead { color: var(--inverse-dim); }
.dark-section .dims { color: var(--gold); font-size: 12px; letter-spacing: 2px; }
.dark-section .link-arrow { color: var(--inverse); }
.dark-section .link-arrow:hover { border-bottom-color: var(--inverse); }
.dark-inner { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; }

/* ---------- 页脚 ---------- */
.site-footer { padding: 48px var(--pad); }
.footer-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border-top: 1px solid var(--line);
  padding-top: 32px;
}
.footer-inner .brandmark .zh { font-size: 21px; letter-spacing: 4px; }
.footer-inner .brandmark .en { font-size: 8px; letter-spacing: 4px; }
.footer-meta { display: flex; gap: 36px; font-size: 11px; letter-spacing: 1px; color: var(--muted); }
.footer-note { margin-top: 24px; font-size: 11px; letter-spacing: 1px; color: var(--muted); }

/* ---------- 空间页 ---------- */
.page-hero { padding: 76px var(--pad); display: flex; flex-direction: column; align-items: flex-start; gap: 22px; min-height: 480px; }
.page-hero .big-glyph { font-size: 88px; font-weight: 200; line-height: 1.25; margin: 0; }
.page-hero .sub { font-size: 31px; font-weight: 300; letter-spacing: 5px; margin: 0; }
.page-hero .latin-note { font-family: var(--latin); font-size: 9px; letter-spacing: 4px; color: var(--gold); }

.space-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.space-card {
  background: var(--card);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: background .35s var(--ease), transform .35s var(--ease);
}
.space-card:hover { background: var(--card-hover); transform: translateY(-3px); }
.space-card .num { font-family: var(--latin); font-size: 11px; letter-spacing: 2px; color: var(--gold); margin: 0; }
.space-card .glyph { font-size: 44px; font-weight: 200; letter-spacing: 4px; line-height: 1.2; margin: 0; }
.space-card .bar { width: 40px; height: 2px; }
.space-card .art { width: 100%; height: 150px; }
.space-card .name { font-size: 20px; font-weight: 400; letter-spacing: 3px; margin: 0; }
.space-card .desc {
  font-size: 13px; line-height: 25px; letter-spacing: .5px; color: var(--body);
  margin: 0; min-height: 52px;
}
.space-card .tag { font-size: 11px; letter-spacing: 1.5px; color: var(--moss); margin: auto 0 0; }

.order-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.order-table th, .order-table td {
  text-align: left;
  padding: 22px 12px;
  font-weight: 300;
  border-bottom: 1px solid var(--line);
}
.order-table th { font-size: 11px; letter-spacing: 2px; color: var(--moss); border-bottom-color: var(--line-2); }
.order-table td { font-size: 14px; letter-spacing: 2px; color: var(--body); }
.order-table td:first-child { font-size: 15px; font-weight: 400; color: var(--ink); }
.order-table tr:last-child td { border-bottom-color: var(--line-2); }
.order-table th:first-child, .order-table td:first-child { padding-left: 0; }
.section-end { margin-top: 28px; font-size: 12px; letter-spacing: 3px; color: var(--moss); }

/* ---------- 茶席页 ---------- */
.topic {
  display: grid;
  grid-template-columns: 520px minmax(0, 1fr);
  gap: 72px;
  align-items: center;
  padding: 72px var(--pad);
  background: var(--paper-2);
}
.topic-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 22px; }
.topic-copy h2 { font-size: 40px; font-weight: 200; letter-spacing: 6px; margin: 0; }
.topic-copy .hints { font-size: 12px; line-height: 25px; letter-spacing: 1.5px; color: var(--moss); margin: 0; }
.topic-copy .deadline { font-size: 11px; letter-spacing: 2px; color: var(--moss); margin: 0; }
.topic-visual { height: 316px; overflow: hidden; background: linear-gradient(118deg, #F2EEE5 0%, #DBDDD3 100%); }
.topic-visual svg { width: 100%; height: 100%; }

.letter-list { margin-top: 8px; }
.letter {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.letter:first-child { border-top: 1px solid var(--line-2); }
.letter .num { font-family: var(--latin); font-size: 13px; letter-spacing: 2px; color: var(--gold); }
.letter .text { font-size: 15px; font-weight: 300; letter-spacing: 1px; line-height: 30px; margin: 0 0 12px; }
.letter .by { font-size: 11px; letter-spacing: 2px; color: var(--moss); }
.letter-note { font-size: 12px; letter-spacing: 1px; color: var(--body); margin: 0; }

.submit-band { background: var(--paper-2); padding: 64px var(--pad); }
.submit-band .inner { display: flex; flex-direction: column; align-items: flex-start; gap: 22px; }
.submit-band h2 { font-size: 26px; font-weight: 300; letter-spacing: 3px; margin: 0; }
.submit-band .small { font-size: 11px; letter-spacing: 1px; color: var(--muted); }

.volumes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 8px; }
.volume { padding: 24px; display: flex; flex-direction: column; gap: 10px; min-height: 112px; }
.volume.is-current { background: var(--card); }
.volume.is-future { background: var(--paper-2); }
.volume .vol { font-family: var(--latin); font-size: 11px; letter-spacing: 2px; color: var(--gold); }
.volume .name { font-size: 17px; letter-spacing: 2px; }
.volume .note { font-size: 11px; letter-spacing: 1px; color: var(--moss); }
.volume.is-future .name, .volume.is-future .note { color: var(--stone); font-weight: 300; }

/* ---------- 山野志 / 关于 页 ---------- */
.journal-grid { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 72px; align-items: start; }
.filter-list { display: flex; flex-direction: column; gap: 0; }
.filter-btn {
  appearance: none;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  padding: 18px 0;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 2px;
  color: var(--body);
  cursor: pointer;
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}
.filter-btn:hover { color: var(--ink); padding-left: 6px; }
.filter-btn.is-active { color: var(--moss); font-weight: 400; }
.filter-btn .idx { font-family: var(--latin); font-size: 10px; color: var(--gold); margin-right: 14px; letter-spacing: 1px; }

.entry-list { display: flex; flex-direction: column; }
.entry {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 24px;
}
.entry:first-child { border-top: 1px solid var(--line-2); }
.entry .code { font-family: var(--latin); font-size: 11px; letter-spacing: 2px; color: var(--gold); padding-top: 6px; }
.entry h3 { font-size: 20px; font-weight: 400; letter-spacing: 3px; margin: 0 0 12px; }
.entry p { font-size: 13px; line-height: 26px; letter-spacing: .5px; color: var(--body); margin: 0; max-width: 640px; }
.entry .meta { margin-top: 14px; font-size: 11px; letter-spacing: 1.5px; color: var(--moss); }

.about-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 96px; align-items: start; }
.about-split .lead { font-size: 15px; line-height: 32px; }
.value-list { display: flex; flex-direction: column; gap: 0; margin-top: 16px; }
.value-item { padding: 22px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 20px; }
.value-item:first-child { border-top: 1px solid var(--line-2); }
.value-item .n { font-family: var(--latin); font-size: 11px; color: var(--gold); letter-spacing: 1px; padding-top: 4px; }
.value-item .t { font-size: 15px; letter-spacing: 2px; }
.value-item .d { font-size: 12px; line-height: 24px; color: var(--body); margin-top: 8px; letter-spacing: .5px; }

/* ---------- 克制的入场动效 ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  :root { --pad: 56px; }
  .hero { grid-template-columns: 440px minmax(0, 1fr); gap: 48px; }
  .hero-mark .zh { font-size: 76px; letter-spacing: 16px; }
  .topic { grid-template-columns: 420px minmax(0, 1fr); gap: 48px; }
  .tea-grid { gap: 14px; }
  .tea-card { padding: 24px; }
  .space-grid { gap: 16px; }
  .space-card { padding: 24px; }
}

@media (max-width: 900px) {
  :root { --pad: 32px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 0; right: 0; top: 88px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px var(--pad) 24px;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { width: 100%; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .site-nav a:last-child { border-bottom: 0; }
  .site-nav a::after { display: none; }

  .hero { grid-template-columns: 1fr; gap: 44px; padding-top: 64px; padding-bottom: 64px; min-height: 0; }
  .hero-visual { height: 340px; order: -1; }
  .hero-mark .zh { font-size: 68px; letter-spacing: 14px; }
  .hero-slogan { font-size: 26px; letter-spacing: 6px; }
  .topic { grid-template-columns: 1fr; gap: 44px; }
  .topic-visual { height: 280px; order: -1; }
  .topic-copy h2 { font-size: 32px; }
  .tea-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .space-grid { grid-template-columns: 1fr; }
  .space-card .art { height: 170px; }
  .volumes { grid-template-columns: 1fr; }
  .journal-grid { grid-template-columns: 1fr; gap: 40px; }
  .filter-list { flex-direction: row; flex-wrap: wrap; gap: 0 24px; }
  .filter-btn { border-bottom: 0; padding: 12px 0; }
  .about-split { grid-template-columns: 1fr; gap: 48px; }
  .section-pad { padding: 72px var(--pad); }
  .series { padding: 72px var(--pad); }
  .dark-section { padding: 64px var(--pad); }
}

@media (max-width: 600px) {
  :root { --pad: 24px; }
  .header-inner { height: 72px; }
  .site-nav { top: 72px; }
  .brandmark .zh { font-size: 23px; letter-spacing: 4px; }
  .brandmark .en { font-size: 8px; letter-spacing: 3px; }
  .hero-mark .zh { font-size: 54px; letter-spacing: 10px; }
  .hero-slogan { font-size: 22px; letter-spacing: 4px; }
  .hero-visual { height: 250px; }
  .section-title { font-size: 22px; letter-spacing: 2px; }
  .page-hero { min-height: 0; padding-top: 56px; padding-bottom: 56px; }
  .page-hero .big-glyph { font-size: 68px; }
  .page-hero .sub { font-size: 22px; letter-spacing: 3px; }
  .dark-section .display { font-size: 34px; letter-spacing: 8px; }
  .tea-grid { grid-template-columns: 1fr; }
  .tea-card { min-height: 0; }
  .tea-card .desc { min-height: 0; }
  .order-table th, .order-table td { padding: 16px 8px; font-size: 12px; letter-spacing: 1px; }
  .order-table td:first-child { font-size: 13px; }
  .letter { grid-template-columns: 36px minmax(0, 1fr); gap: 16px; }
  .letter .text { font-size: 14px; line-height: 28px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-meta { gap: 20px; flex-wrap: wrap; }
  .entry { grid-template-columns: 1fr; gap: 8px; }
  .value-item { grid-template-columns: 40px minmax(0, 1fr); gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}