/* ============================================================
   叁山愈 · Sanshan Yu — 站点样式
   视觉方向：雨后深山 / 浓雾 / 岩石 / 苔藓 / 留白
   ============================================================ */

/* ---------- 1. Design tokens ---------- */
:root {
  /* 主色：墨黑 · 深森林绿 · 苔绿 · 雾白 · 岩灰 */
  --ink:         #0B100E;
  --forest-900:  #101A16;
  --forest-800:  #16241E;
  --forest-700:  #1E3128;
  --forest-600:  #2A4136;
  --moss:        #5C7F68;
  --moss-soft:   #86A492;
  --fog-50:      #F6F4EF;
  --fog-100:     #EDEAE3;
  --fog-200:     #E0DCD3;
  --stone-400:   #A6A9A3;
  --stone-500:   #82867F;
  --stone-600:   #63675F;
  --rock:        #3A403B;

  /* 语义 */
  --bg:          var(--fog-50);
  --bg-alt:      var(--fog-100);
  --text:        var(--ink);
  --text-soft:   var(--stone-600);
  --text-faint:  var(--stone-500);
  --line:        rgba(11, 16, 14, 0.12);
  --line-soft:   rgba(11, 16, 14, 0.07);

  /* 字体 */
  --serif: 'Cormorant Garamond', 'Noto Serif SC', 'Songti SC', 'STSong', Georgia, serif;
  --sans:  'Manrope', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 间距（8px 基准） */
  --s1: 8px;  --s2: 16px;  --s3: 24px;  --s4: 32px;
  --s5: 48px; --s6: 64px;  --s7: 96px;  --s8: 144px;

  --radius: 2px;
  --radius-lg: 3px;
  --shadow-1: 0 1px 2px rgba(11,16,14,.05), 0 8px 24px -16px rgba(11,16,14,.18);
  --shadow-2: 0 2px 4px rgba(11,16,14,.06), 0 24px 48px -24px rgba(11,16,14,.28);

  --ease: cubic-bezier(.22,.61,.36,1);
  --dur: 600ms;

  --maxw: 1240px;
  --fog-strength: 1;   /* Tweaks 滑杆 */
  --fog-weather: .22;  /* 首屏雾气基准（很淡，素材本身就是云） */
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 350;
  line-height: 1.72;
  letter-spacing: .002em;
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--forest-700); color: var(--fog-50); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: -.012em;
  margin: 0;
}
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

:focus-visible {
  outline: 1px solid var(--moss);
  outline-offset: 3px;
}

/* 语言切换：只显示当前语言的长段落 */
html[data-lang="zh"] .lang.en,
html[data-lang="en"] .lang.zh { display: none; }
html[data-lang="en"] { --serif: 'Cormorant Garamond', Georgia, serif; }
/* ---- 纪录片式中文排版 ----
   参考《我在故宫修文物》《寻味中国》：粗宋标题 + 极开字距 + 细体小字副题，
   靠字重和留白建立气场，不靠书法体。 */
html[data-lang="zh"] h1,
html[data-lang="zh"] h2,
html[data-lang="zh"] h3,
html[data-lang="zh"] .quote,
html[data-lang="zh"] .card__title,
html[data-lang="zh"] .academy__title,
html[data-lang="zh"] .consultant-row__name {
  font-family: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.36;
}
html[data-lang="zh"] .section-title,
html[data-lang="zh"] .quote { font-weight: 700; letter-spacing: .1em; line-height: 1.3; }
html[data-lang="zh"] .philosophy .quote { letter-spacing: .12em; line-height: 1.24; }
/* ---- 书法体：马善政毛笔楷书（Ma Shan Zheng，Google Fonts 免费开源） ----
   楷书笔意、结构完整、可读性好；正文仍用无衬线，保证长段落易读。 */
:root { --brush: 'Ma Shan Zheng', 'ZCOOL XiaoWei', 'Kaiti SC', 'STKaiti', serif; }
/* 英文没有毛笔楷书可用（Ma Shan Zheng 的拉丁字形很难读），改用同气质的高雅衬线 */
html[data-lang="en"] { --brush: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif; }

h1, h2, h3,
.quote, .section-title, .academy__title, .card__title,
.consultant-row__name, .cat-card__name, .hero__slogan,
.confirm h2, .prose h2, .prose h3, .panel h3, .faq summary {
  font-family: var(--brush);
  font-weight: 400;
  letter-spacing: .06em;
  line-height: 1.5;
}
.section-title, .quote { letter-spacing: .09em; line-height: 1.45; }
.philosophy .quote { line-height: 1.34; letter-spacing: .1em; }

/* 品牌名：书法体 + 极开字距 */
.hero__mark {
  font-family: var(--brush);
  font-weight: 400;
  font-size: clamp(56px, 11.5vw, 148px);
  letter-spacing: .3em;
  line-height: 1.12;
  margin-left: 0;
}
.hero__mark i { font-style: normal; display: inline-block; opacity: 0; transform: translateY(26px); animation: mark-in 1.5s var(--ease) forwards; }
.hero__mark i:nth-child(2) { animation-delay: .13s; }
.hero__mark i:nth-child(3) { animation-delay: .26s; }
html[data-lang="en"] .hero__mark { font-size: clamp(34px, 7vw, 92px); letter-spacing: .22em; }
html[data-lang="en"] .hero__mark i { display: block; }
.brand__mark, .footer-brand__mark { font-family: var(--brush); font-weight: 400; }

html[data-lang="zh"] .hero__slogan {
  font-family: var(--brush); font-weight: 400;
  letter-spacing: .14em; line-height: 1.75;
  font-size: clamp(20px, 2.4vw, 30px);
}
/* 片名下的一行小字：拉丁字距拉到最开 */
.hero__sub { font-size: clamp(10px, 1.1vw, 12.5px) !important; letter-spacing: .42em !important; }

/* ---------- 3. Layout helpers ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(20px, 5vw, 56px); }
.wrap--narrow { max-width: 820px; }
.section { padding-block: clamp(64px, 9vw, 128px); position: relative; }
/* 区块呼吸等级：禅意需要停顿，不能全站一个 padding */
.section--intro  { padding-block: clamp(88px, 12vw, 168px) clamp(96px, 13vw, 184px); }
.section--breath { padding-block: clamp(104px, 14vw, 190px) clamp(112px, 15vw, 200px); }
.section--tight  { padding-block: clamp(56px, 7vw, 96px); }
.section--alt { background: var(--bg-alt); }
.section--dark {
  background: var(--forest-900);
  color: var(--fog-100);
  --text: var(--fog-50);
  --text-soft: rgba(246,244,239,.62);
  --text-faint: rgba(246,244,239,.44);
  --line: rgba(246,244,239,.16);
  --line-soft: rgba(246,244,239,.09);
}
.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---- 带图区块：任何 section 加上 .section--photo + --sec-img 即可 ---- */
.section--photo { position: relative; overflow: hidden; isolation: isolate; }
.section--photo::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background-size: cover; background-position: center;
  opacity: var(--sec-op, .16);
  filter: sepia(.22) hue-rotate(184deg) saturate(1.1) brightness(.88);
  mix-blend-mode: luminosity;
  animation: cover-drift 64s var(--ease) infinite alternate;
}
html[data-motion="off"] .section--photo::before { animation: none; }

/* ---- 编辑式配图：正文旁的一张竖图 ---- */
.edit-figure { margin: 0; }
.edit-figure--pair { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(12px, 1.6vw, 22px); }
.edit-figure--pair .edit-figure__img { aspect-ratio: 3 / 4; }
.edit-figure--pair > .edit-figure__frame:last-child { margin-top: clamp(20px, 4vw, 56px); }
.edit-figure__frame { display: block; overflow: hidden; position: relative; }
.edit-figure__img {
  display: block; aspect-ratio: 3 / 4;
  background-size: cover; background-position: center;
  filter: sepia(.2) hue-rotate(184deg) saturate(1.3) contrast(1.08) brightness(.96);
  animation: cover-drift 46s var(--ease) infinite alternate;
}
.edit-figure__frame::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(28,44,36,.12), rgba(11,16,14,.42));
  mix-blend-mode: multiply;
}
.edit-figure figcaption {
  margin-top: 13px; font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--text-faint);
}
html[data-motion="off"] .edit-figure__img { animation: none; }

/* ---- 结尾 CTA：整幅实景band ---- */
.section--cta {
  position: relative; overflow: hidden; isolation: isolate;
  background: var(--ink); color: var(--fog-50);
  --text: var(--fog-50); --line: rgba(246,244,239,.2);
}
.section--cta::before {
  content: ''; position: absolute; inset: 0; z-index: -2;
  background-image: url('../media/hero-poster.jpg'); background-size: cover; background-position: center 40%;
  filter: sepia(.25) hue-rotate(184deg) saturate(1.2) brightness(.6) contrast(1.06);
  animation: cover-drift 58s var(--ease) infinite alternate;
}
.section--cta::after {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(90% 80% at 50% 50%, rgba(11,16,14,.42), rgba(11,16,14,.86));
}
html[data-motion="off"] .section--cta::before { animation: none; }

.eyebrow {
  display: flex; align-items: center; gap: var(--s2);
  font-size: 12px; font-weight: 500;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: var(--s3);
}
.eyebrow::before {
  content: ''; width: 32px; height: 1px; flex: none;
  background: currentColor; opacity: .5;
}
.section-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 72px); }
.section-title { font-size: clamp(36px, 4.8vw, 64px); }
.section-sub { margin-top: var(--s2); color: var(--text-soft); font-size: 17px; max-width: 54ch; }
.head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s4); flex-wrap: wrap; }

/* ---------- 4. Buttons ---------- */
.btn {
  --btn-bg: var(--forest-800);
  --btn-fg: var(--fog-50);
  --btn-bd: var(--forest-800);
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1px solid var(--btn-bd); border-radius: var(--radius);
  font-size: 14px; font-weight: 500; letter-spacing: .04em;
  cursor: pointer;
  transition: background 280ms var(--ease), color 280ms var(--ease),
              border-color 280ms var(--ease), transform 280ms var(--ease);
}
.btn:hover { background: var(--forest-600); border-color: var(--forest-600); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn[disabled], .btn.is-disabled { opacity: .4; pointer-events: none; }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--text); --btn-bd: var(--line); }
.btn--ghost:hover { background: transparent; border-color: currentColor; color: var(--text); }
.btn--onDark { --btn-bg: var(--fog-50); --btn-fg: var(--ink); --btn-bd: var(--fog-50); }
.btn--onDark:hover { background: #fff; border-color: #fff; }
.btn--outlineDark { --btn-bg: transparent; --btn-fg: var(--fog-50); --btn-bd: rgba(246,244,239,.34); }
.btn--outlineDark:hover { background: rgba(246,244,239,.08); border-color: rgba(246,244,239,.7); }
.btn--sm { padding: 10px 18px; font-size: 13px; }
.btn--block { width: 100%; justify-content: center; }
.btn__arrow { transition: transform 280ms var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.link-more {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13.5px; font-weight: 500; letter-spacing: .06em;
  padding-bottom: 4px; border-bottom: 1px solid var(--line);
  transition: border-color 280ms var(--ease), gap 280ms var(--ease);
}
.link-more:hover { border-color: currentColor; gap: 14px; }

/* ---------- 5. Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  transition: background 400ms var(--ease), border-color 400ms var(--ease), backdrop-filter 400ms;
  border-bottom: 1px solid transparent;
}
.site-header__inner {
  display: flex; align-items: center; gap: var(--s4);
  height: 74px;
}
.site-header a { color: var(--fog-50); }
.site-header.is-solid {
  background: rgba(246,244,239,.86);
  backdrop-filter: blur(14px) saturate(1.1);
  border-bottom-color: var(--line-soft);
}
.site-header.is-solid a { color: var(--ink); }
.site-header.is-light a { color: var(--ink); }

.brand { display: flex; align-items: baseline; gap: 10px; margin-right: auto; }
.brand__mark {
  font-family: var(--serif); font-size: 24px; letter-spacing: .16em;
  font-weight: 500;
}
.brand__sub {
  font-size: 9.5px; letter-spacing: .2em; text-transform: uppercase;
  opacity: .5; padding-bottom: 3px;
}
@media (max-width: 900px) { .brand__sub { display: none; } }

.nav { display: flex; align-items: center; gap: var(--s3); }
.nav a {
  position: relative; font-size: 14px; font-weight: 400; letter-spacing: .02em;
  padding: 6px 0; opacity: .82;
  transition: opacity 240ms var(--ease);
}
.nav a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: currentColor;
  transition: right 320ms var(--ease);
}
.nav a:hover { opacity: 1; }
.nav a:hover::after, .nav a.is-active::after { right: 0; }
.nav a.is-active { opacity: 1; }

.header-tools { display: flex; align-items: center; gap: var(--s2); margin-left: var(--s2); }
.lang-toggle { display: flex; align-items: center; gap: 2px; }
.lang-toggle button {
  background: none; border: 0; cursor: pointer;
  padding: 6px 4px; font-size: 12px; letter-spacing: .1em; font-weight: 500;
  opacity: .42; transition: opacity 240ms var(--ease);
}
.lang-toggle button:hover { opacity: .75; }
.lang-toggle button.is-active {
  opacity: 1; border-bottom: 1px solid currentColor;
}
.lang-toggle em { font-style: normal; opacity: .28; font-size: 11px; }

.burger {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
}
.burger span { display: block; width: 22px; height: 1px; background: currentColor; }
.burger span + span { margin-top: 6px; }

@media (max-width: 860px) {
  .burger { display: block; }
  .nav {
    position: fixed; inset: 74px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--fog-50); border-bottom: 1px solid var(--line);
    padding: var(--s2) clamp(20px,5vw,56px) var(--s4);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity 280ms var(--ease), transform 280ms var(--ease);
  }
  .nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .site-header .nav a { color: var(--ink); font-size: 19px; font-family: var(--serif); padding: 12px 0; border-bottom: 1px solid var(--line-soft); }
  .nav a::after { display: none; }
}

/* ---------- 6. Hero：雨后深山（实景视频） ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: flex-end;
  background: var(--ink); color: var(--fog-50);
  overflow: hidden; isolation: isolate;
}

/* 实景素材层：视频 + 海报兜底（视频未加载 / 关闭动效时显示海报） */
.hero__media {
  position: absolute; inset: 0; z-index: 0; overflow: hidden;
  background: var(--ink) url('../media/hero-poster.jpg') center / cover no-repeat;
}
.hero__video {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  /* 国家地理式的云端：保留真实色彩，只提微反差和通透度，不做灰绿降饱和 */
  filter: sepia(var(--hero-cool, .26)) hue-rotate(184deg) saturate(var(--hero-sat, 1.5)) contrast(1.07) brightness(var(--hero-bright, 1.02));
  transform: scale(1.05);
  animation: hero-breathe 52s var(--ease) infinite alternate;
  opacity: 0;
  transition: opacity 1.5s linear;
}
.hero__video.is-active { opacity: 1; }
.hero__video.is-off { opacity: 0 !important; }
@keyframes hero-breathe {
  from { transform: scale(1.05) translate3d(0, 0, 0); }
  to   { transform: scale(1.13) translate3d(-1.6%, -1.2%, 0); }
}
/* 调色层：高光偏暖、阴影偏青，云层之间拉开层次（soft-light 不会压死色彩） */
.hero__tint { display: none; }
/* 上下压暗，保证白字可读 */
.hero__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(0,0,0,.34) 0%,
    rgba(0,0,0,0) 30%,
    rgba(0,0,0,.18) 62%,
    rgba(0,0,0,.82) 100%);
}
.hero__vignette {
  position: absolute; inset: 0; z-index: 4; pointer-events: none;
  background: radial-gradient(120% 92% at 50% 46%, transparent 54%, rgba(0,0,0,.3));
}
/* 实景素材出处 */
.hero__credit {
  position: absolute; left: clamp(20px,5vw,56px); bottom: 18px; z-index: 5;
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: rgba(246,244,239,.26);
  transition: color 300ms var(--ease);
}
.hero__credit:hover { color: rgba(246,244,239,.6); }
@media (max-width: 700px) { .hero__credit { display: none; } }
.fog {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  mix-blend-mode: screen;
}
.fog i {
  position: absolute; display: block; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(226,231,226,.5), rgba(226,231,226,0) 72%);
  filter: blur(28px);
  will-change: transform;
}

.fog i:nth-child(1) { left: -14%; bottom: 8%;  width: 78%;  height: 26%; opacity: calc(.5 * var(--fog-strength) * var(--fog-weather)); animation: drift-a 46s var(--ease) infinite alternate; }
.fog i:nth-child(2) { right: -18%; bottom: 22%; width: 68%;  height: 20%; opacity: calc(.38 * var(--fog-strength) * var(--fog-weather)); animation: drift-b 62s var(--ease) infinite alternate; }
.fog i:nth-child(3) { left: 12%;  bottom: 34%;  width: 60%;  height: 14%; opacity: calc(.3 * var(--fog-strength) * var(--fog-weather)); animation: drift-c 54s var(--ease) infinite alternate; }
.fog i:nth-child(4) { left: -6%;  bottom: -4%;  width: 120%; height: 22%; opacity: calc(.42 * var(--fog-strength) * var(--fog-weather)); animation: drift-b 72s var(--ease) infinite alternate; }
@keyframes drift-a { from { transform: translate3d(-4%, 2%, 0) scale(1); } to { transform: translate3d(14%, -3%, 0) scale(1.12); } }
@keyframes drift-b { from { transform: translate3d(6%, 0, 0) scale(1.06); } to { transform: translate3d(-10%, -4%, 0) scale(1); } }
@keyframes drift-c { from { transform: translate3d(-8%, 1%, 0) scale(1); } to { transform: translate3d(10%, -6%, 0) scale(1.18); } }

.grain {
  position: absolute; inset: 0; z-index: 4; pointer-events: none; opacity: .09;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

.hero__inner { position: relative; z-index: 5; width: 100%; padding-bottom: clamp(56px, 8vh, 104px); padding-top: 140px; }
.hero__mark {
  font-family: var(--serif);
  font-size: clamp(62px, 13vw, 172px);
  line-height: .92; letter-spacing: .06em; font-weight: 400;
  margin-left: -.04em;
}
.hero__mark span { display: inline-block; opacity: 0; transform: translateY(26px); animation: mark-in 1.5s var(--ease) forwards; }
.hero__mark span:nth-child(2) { animation-delay: .13s; }
.hero__mark span:nth-child(3) { animation-delay: .26s; }
@keyframes mark-in { to { opacity: 1; transform: none; } }

.hero__meta {
  display: flex; align-items: center; gap: var(--s3);
  margin-top: var(--s4); flex-wrap: wrap;
  opacity: 0; animation: mark-in 1.2s .5s var(--ease) forwards;
}
.hero__sub {
  font-size: clamp(13px, 1.4vw, 16px); letter-spacing: .24em;
  text-transform: uppercase; color: rgba(246,244,239,.72);
}
.hero__line { flex: 1 1 60px; height: 1px; background: rgba(246,244,239,.24); min-width: 40px; }
.hero__slogan {
  font-family: var(--serif); font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.5; max-width: 22ch; margin-top: var(--s3);
  color: rgba(246,244,239,.9);
  opacity: 0; animation: mark-in 1.2s .66s var(--ease) forwards;
}
.hero__actions {
  display: flex; gap: var(--s2); flex-wrap: wrap; margin-top: var(--s5);
  opacity: 0; animation: mark-in 1.2s .82s var(--ease) forwards;
}
.hero__scroll {
  position: absolute; right: clamp(20px,5vw,56px); bottom: clamp(56px,8vh,104px); z-index: 5;
  display: flex; align-items: center; gap: 12px;
  font-size: 10.5px; letter-spacing: .24em; text-transform: uppercase;
  color: rgba(246,244,239,.5);
  writing-mode: vertical-rl;
}
.hero__scroll::after {
  content: ''; width: 1px; height: 56px; background: rgba(246,244,239,.3);
  animation: scroll-hint 2.6s var(--ease) infinite;
  transform-origin: top;
}
@keyframes scroll-hint { 0%,100% { transform: scaleY(.3); opacity: .4; } 50% { transform: scaleY(1); opacity: 1; } }
@media (max-width: 700px) { .hero__scroll { display: none; } }

/* ---------- 7. Page head（内页顶部） ---------- */
.page-head {
  position: relative; background: var(--forest-900); color: var(--fog-50);
  padding-top: 154px; padding-bottom: clamp(48px, 7vw, 88px);
  overflow: hidden; isolation: isolate;
}
.page-head__bg { position: absolute; inset: 0; z-index: 0; background: radial-gradient(110% 130% at 22% -20%, #263A31, #101A16 62%, #0B100E); }
/* 内页顶部：每一页配一张与主题相关的图，并且缓慢移动 */
.page-head__photo {
  position: absolute; inset: 0; z-index: 0;
  background-image: var(--head-img, url('../media/hero-poster.jpg'));
  background-position: center 30%; background-size: cover; background-repeat: no-repeat;
  opacity: .5; filter: sepia(.25) hue-rotate(184deg) saturate(1.2) brightness(.72);
  mix-blend-mode: luminosity;
  animation: cover-drift 52s var(--ease) infinite alternate;
}
html[data-motion="off"] .page-head__photo { animation: none; }
body[data-page="courses"]     { --head-img: url('../media/pages/books.jpg'); }      /* 古籍书架 */
body[data-page="consultants"] { --head-img: url('../media/pages/tea.jpg'); }        /* 茶席对谈 */
body[data-page="account"]     { --head-img: url('../media/pages/east-brush.jpg'); } /* 笔与砚 */
body[data-page="about"]       { --head-img: url('../media/hero-poster.jpg'); }     /* 山与云海 */
body[data-page="east"]        { --head-img: url('../media/pages/east-ink.jpg'); }   /* 文房四宝 */
body[data-page="west"]        { --head-img: url('../media/pages/west-tarot.jpg'); } /* 塔罗与烛 */
body[data-page="legal"]       { --head-img: url('../media/pages/globe.jpg'); }
.page-head__photo::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,16,14,.5), rgba(11,16,14,.92));
}
.page-head .fog { z-index: 1; }
.page-head .grain { z-index: 2; opacity: .1; }
.page-head__inner { position: relative; z-index: 3; }
.page-head h1 { font-size: clamp(34px, 6vw, 74px); }
.page-head__sub { margin-top: var(--s3); max-width: 56ch; color: rgba(246,244,239,.66); }
.crumbs { display: flex; gap: 10px; align-items: center; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: rgba(246,244,239,.44); margin-bottom: var(--s3); }
.crumbs a:hover { color: var(--fog-50); }
.crumbs span { opacity: .5; }

/* ---------- 8. Cards ---------- */
/* 杂志式课程网格：12 栏，宽窄交替，避免整齐划一的商品墙 */
.grid--edit { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(32px, 4vw, 72px) clamp(24px, 3vw, 48px); }
.grid--edit > .card:nth-child(4n+1) { grid-column: span 7; }
.grid--edit > .card:nth-child(4n+2) { grid-column: span 5; }
.grid--edit > .card:nth-child(4n+3) { grid-column: span 5; }
.grid--edit > .card:nth-child(4n+4) { grid-column: span 7; }
.grid--edit > .card:nth-child(4n+1) .cover,
.grid--edit > .card:nth-child(4n+4) .cover { aspect-ratio: 16 / 9; }
.grid--edit > .card:nth-child(4n+1) .card__title,
.grid--edit > .card:nth-child(4n+4) .card__title { font-size: clamp(26px, 2.4vw, 34px); }
.grid--edit > .card:nth-child(4n+2) .cover,
.grid--edit > .card:nth-child(4n+3) .cover { aspect-ratio: 3 / 4; }
/* 宽卡下移半拍，制造错落 */
.grid--edit > .card:nth-child(4n+4) { margin-top: clamp(0px, 5vw, 72px); }
@media (max-width: 900px) {
  .grid--edit { grid-template-columns: repeat(6, 1fr); }
  .grid--edit > .card { grid-column: span 6 !important; margin-top: 0 !important; }
  .grid--edit > .card .cover { aspect-ratio: 16 / 10 !important; }
}

.grid { display: grid; gap: clamp(20px, 2.4vw, 32px); }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(292px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); }

.card { position: relative; display: flex; flex-direction: column; background: transparent; }

/* ---- 课程封面：东西方两套构图语法，共享同一套材质处理 ---- */
.cover {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  background: var(--forest-900);
}
.cover__img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: sepia(.2) hue-rotate(184deg) saturate(1.25) contrast(1.1) brightness(.92);
  transition: filter 1.4s var(--ease);
  /* 封面自己会动：极慢的推镜，每张时长和相位都不同 */
  animation: cover-drift var(--cover-dur, 34s) var(--ease) var(--cover-delay, 0s) infinite alternate;
}
@keyframes cover-drift {
  from { transform: scale(1.06) translate3d(0, 0, 0); }
  to   { transform: scale(1.15) translate3d(-2.4%, -1.8%, 0); }
}
.card:hover .cover__img { filter: sepia(.12) hue-rotate(184deg) saturate(1.4) contrast(1.14) brightness(1); }

/* 封面内部也有雾，跟首屏同一套语言 */
.cover__mist { position: absolute; inset: 0; mix-blend-mode: screen; pointer-events: none; }
.cover__mist::before {
  content: ''; position: absolute; left: -28%; bottom: -14%;
  width: 92%; height: 56%; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(226,231,226,.42), transparent 74%);
  filter: blur(20px);
  animation: cover-mist var(--cover-dur, 34s) var(--ease) var(--cover-delay, 0s) infinite alternate;
}
@keyframes cover-mist {
  from { transform: translate3d(-8%, 6%, 0) scale(1); }
  to   { transform: translate3d(34%, -8%, 0) scale(1.34); }
}
html[data-motion="off"] .cover__img,
html[data-motion="off"] .cover__mist::before { animation: none; }
/* 罩染：东方偏暖纸石，西方偏冷档案 */
.cover__veil { position: absolute; inset: 0; mix-blend-mode: multiply; }
.cover--east .cover__veil { background: linear-gradient(174deg, rgba(36,54,44,.3) 0%, rgba(13,20,16,.78) 92%); }
.cover--west .cover__veil { background: linear-gradient(174deg, rgba(18,26,26,.42) 0%, rgba(9,13,14,.86) 92%); }
.cover__cast { position: absolute; inset: 0; mix-blend-mode: soft-light; }
.cover--east .cover__cast { background: rgba(88,132,140,.34); }
.cover--west .cover__cast { background: rgba(72,104,150,.4); }

.cover__cat { position: absolute; color: rgba(246,244,239,.94); }
.cover--east .cover__cat {
  right: 20px; top: 20px; writing-mode: vertical-rl;
  font-family: var(--serif); font-size: 27px; letter-spacing: .24em; font-weight: 500;
}
.cover--west .cover__cat {
  left: 20px; bottom: 18px;
  font-family: var(--sans); font-size: 12.5px; font-weight: 500;
  letter-spacing: .34em; text-transform: uppercase;
}
.cover__idx {
  position: absolute; font-size: 10px; letter-spacing: .24em;
  color: rgba(246,244,239,.52); font-variant-numeric: tabular-nums;
}
.cover--east .cover__idx { left: 20px; bottom: 18px; }
.cover--west .cover__idx { left: 20px; top: 18px; }
/* 一条会展开的导向线，代替整卡上浮 */
.cover__rule { position: absolute; background: rgba(246,244,239,.24); transition: transform 1s var(--ease); }
.cover--east .cover__rule { right: 48px; top: 20px; bottom: 20px; width: 1px; transform-origin: top; transform: scaleY(.26); }
.card:hover .cover--east .cover__rule { transform: scaleY(1); }
.cover--west .cover__rule { left: 20px; right: 20px; bottom: 44px; height: 1px; transform-origin: left; transform: scaleX(.22); }
.card:hover .cover--west .cover__rule { transform: scaleX(1); }

.badge {
  position: absolute; top: 18px; right: 20px; z-index: 2;
  font-size: 10px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase;
  color: rgba(246,244,239,.72);
}
.cover--east .badge { right: auto; left: 20px; top: 18px; }
.badge--free { color: var(--moss-soft); }
.badge--unlocked { color: rgba(246,244,239,.95); }

.card__body {
  position: relative; padding-top: 22px; display: flex; flex-direction: column; flex: 1;
}
.card__body::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--rock); transform-origin: left; transform: scaleX(.18);
  transition: transform 900ms var(--ease);
}
.card:hover .card__body::before { transform: scaleX(1); }
.card__meta {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  font-size: 12px; letter-spacing: .1em;
  color: var(--text-soft); margin-bottom: 12px;
}
.card__meta i { width: 3px; height: 3px; background: currentColor; border-radius: 50%; opacity: .5; }
.card__title { font-size: 25px; line-height: 1.24; }
.card__desc { margin-top: 12px; font-size: 15px; color: var(--text-soft); line-height: 1.68; }

/* 首页精选：一张主课程 + 两张次课程，打破等分网格 */
.featured-grid { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(24px, 3vw, 48px); align-items: start; }
.featured-grid__side { display: grid; gap: clamp(28px, 3vw, 44px); }
@media (max-width: 880px) { .featured-grid { grid-template-columns: 1fr; } }
.card--lead .cover { aspect-ratio: 4 / 3; }
.card--lead .card__title { font-size: clamp(28px, 2.9vw, 40px); }
.card--lead .card__desc { font-size: 16.5px; max-width: 46ch; }
.card--sm .cover { aspect-ratio: 3 / 2; }
.card--sm .card__title { font-size: 21px; }
.card__foot {
  margin-top: auto; padding-top: var(--s3);
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s2);
  font-size: 13px; color: var(--text-faint);
}
.price { font-family: var(--serif); font-size: 21px; color: var(--text); letter-spacing: .01em; }
.price small { font-family: var(--sans); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; opacity: .6; margin-right: 5px; }

/* ---- 咨询师名录：不用首字母圆球，靠信息编排建立可信度 ---- */
.roster { display: block; border-bottom: 1px solid var(--line); }
.consultant-row {
  display: grid; grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: var(--s3) var(--s4); align-items: start;
  padding: clamp(28px, 3vw, 44px) 0;
  border-top: 1px solid var(--line);
  transition: background 420ms var(--ease);
}
.consultant-row:hover { background: rgba(255,255,255,.44); }
.section--dark .consultant-row:hover { background: rgba(246,244,239,.04); }
@media (max-width: 760px) {
  .consultant-row { grid-template-columns: 40px minmax(0,1fr); }
  .consultant-row__foot { grid-column: 2; }
}
.consultant-row__idx {
  font-family: var(--serif); font-size: 13px; letter-spacing: .2em;
  color: var(--text-faint); padding-top: 9px; font-variant-numeric: tabular-nums;
}
.consultant-row__name { font-size: clamp(24px, 2.3vw, 33px); line-height: 1.16; }
.consultant-row__role {
  margin-top: 9px; font-size: 12.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-soft);
}
.consultant-row__fields { margin-top: var(--s3); font-size: 16px; color: var(--text); }
.consultant-row__meta {
  margin-top: 12px; font-size: 13.5px; color: var(--text-soft);
  display: flex; gap: var(--s1) var(--s3); flex-wrap: wrap;
}
.consultant-row__meta span { white-space: nowrap; }
.consultant-row__foot { padding-top: 10px; }
.consultant-row__price { font-family: var(--serif); font-size: 24px; white-space: nowrap; }
.consultant-row__price small {
  font-family: var(--sans); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--text-faint); display: block; margin-bottom: 5px;
}
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: var(--s2); }
.tag {
  font-size: 11.5px; letter-spacing: .06em; padding: 4px 10px;
  border: 1px solid var(--line); color: var(--text-soft);
}
.dl { display: grid; grid-template-columns: auto 1fr; gap: 8px var(--s3); margin: var(--s3) 0 0; font-size: 14px; }
.dl dt { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint); padding-top: 3px; }
.dl dd { margin: 0; color: var(--text-soft); }

/* ---------- 9. 学院分屏 ---------- */
.academies { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); }
@media (max-width: 820px) { .academies { grid-template-columns: 1fr; } }
.academy {
  position: relative; overflow: hidden; isolation: isolate;
  padding: clamp(36px, 5vw, 76px);
  background: var(--forest-900); color: var(--fog-50);
  min-height: clamp(420px, 50vw, 640px);
  display: flex; flex-direction: column;
}
.academy::before {
  content: ''; position: absolute; inset: 0; z-index: -2;
  transition: transform 1.1s var(--ease);
}
/* 东方：温石调，文字沉在下半部，一条竖轴贯穿 */
.academy--east::before {
  background:
    radial-gradient(125% 115% at 12% 104%, rgba(44,65,54,.82), rgba(22,33,28,.9) 58%, rgba(11,16,14,.96)),
    url('../media/pages/east-brush.jpg') center / cover no-repeat;
}
.academy--east { justify-content: flex-end; }
.academy--east::after {
  content: ''; position: absolute; z-index: -1; pointer-events: none;
  left: clamp(18px, 2.4vw, 36px); top: 0; bottom: 0; width: 1px;
  background: linear-gradient(rgba(246,244,239,0), rgba(246,244,239,.26) 34%, rgba(246,244,239,0));
}
/* 西方：冷灰档案调，文字顶到上半部，坐标网格 */
.academy--west::before {
  background:
    radial-gradient(125% 115% at 88% -8%, rgba(35,49,47,.8), rgba(18,26,27,.9) 56%, rgba(10,14,15,.97)),
    url('../media/pages/west-orrery.jpg') center / cover no-repeat;
}
.academy--west { justify-content: flex-start; }
.academy--west::after {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .2;
  background-image:
    linear-gradient(rgba(246,244,239,.45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,244,239,.45) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(78% 66% at 84% 16%, #000, transparent 76%);
          mask-image: radial-gradient(78% 66% at 84% 16%, #000, transparent 76%);
}
.academy:hover::before { transform: scale(1.05); }
.academy__index { font-family: var(--serif); font-size: 12.5px; letter-spacing: .3em; opacity: .5; }
.academy__title { font-size: clamp(32px, 4vw, 54px); margin-top: var(--s3); }
.academy__desc { margin-top: var(--s3); color: rgba(246,244,239,.66); font-size: 15.5px; max-width: 36ch; }
/* 分类改成带编号的纵向门类表，不再是一排胶囊标签 */
.academy__cats { display: block; margin-top: clamp(24px, 3vw, 40px); border-top: 1px solid rgba(246,244,239,.16); }
.academy__cat {
  display: flex; align-items: baseline; gap: 16px;
  padding: 11px 0; border-bottom: 1px solid rgba(246,244,239,.1);
  font-size: 14.5px; color: rgba(246,244,239,.86);
  transition: padding-left 420ms var(--ease);
}
.academy:hover .academy__cat { padding-left: 8px; }
.academy__cat b {
  font-family: var(--serif); font-weight: 400; font-size: 11.5px;
  letter-spacing: .18em; color: rgba(246,244,239,.42); min-width: 20px;
}
.academy__cat em { font-style: normal; margin-left: auto; font-size: 11.5px; letter-spacing: .12em; color: rgba(246,244,239,.34); }
.academy__foot { margin-top: var(--s5); }
.academy--east .academy__foot { margin-top: var(--s4); }

/* ---------- 10. 理念 / 引文 ---------- */
.quote {
  font-family: var(--brush); font-weight: 400;
  font-size: clamp(28px, 4vw, 52px);
  line-height: 1.42; letter-spacing: .08em; max-width: 24ch;
}
html[data-lang="en"] .quote { letter-spacing: .01em; line-height: 1.3; }
.pillars { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: var(--s5) var(--s4); margin-top: clamp(40px,5vw,72px); }
.pillar__no { font-family: var(--serif); font-size: 13px; letter-spacing: .2em; color: var(--text-faint); }
.pillar h3 { font-size: 20px; margin-top: 14px; }
.pillar p { margin-top: 10px; font-size: 15px; color: var(--text-soft); }
.pillar { padding-top: var(--s3); border-top: 1px solid var(--line); }

/* 理念段：一句主张占绝对主导，四条原则退成脚注 */
.philosophy {
  display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, .8fr);
  gap: clamp(40px, 7vw, 112px); align-items: start;
}
@media (max-width: 900px) { .philosophy { grid-template-columns: 1fr; } }
.philosophy .quote { font-size: clamp(40px, 6.2vw, 92px); line-height: 1.06; max-width: 10ch; letter-spacing: -.015em; }
.philosophy .pillars { display: block; margin-top: 0; }
.philosophy .pillar { padding: 18px 0; border-top: 1px solid var(--line); }
.philosophy .pillar h3 { font-size: 17px; margin-top: 8px; }
.philosophy .pillar p { font-size: 14.5px; margin-top: 7px; }

/* 品牌介绍：文字与一张竖图并置，正文向右错位 */
.home-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr); gap: clamp(32px, 6vw, 88px); align-items: end; }
@media (max-width: 880px) { .home-intro { grid-template-columns: 1fr; } }
/* 首页导语：两行铺垫 + 一行主语，主语用书法体放大 */
.home-intro__lead { max-width: none; }
.home-intro__lead .lang { display: block; }
.lead__sub,
.lead__key { display: block; white-space: nowrap; font-family: var(--brush); font-weight: 400; }
.lead__sub {
  font-size: clamp(26px, 3.15vw, 46px);
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--rock);
}
.lead__sub + .lead__sub { color: var(--stone-600); }
.lead__key {
  margin-top: clamp(6px, 1vw, 14px);
  font-size: clamp(54px, 7.4vw, 108px);
  line-height: 1.12;
  letter-spacing: .1em;
  color: var(--text);
}
html[data-lang="en"] .lead__key { letter-spacing: .01em; font-size: clamp(42px, 5.2vw, 78px); }
html[data-lang="en"] .lead__sub { letter-spacing: .02em; }
@media (max-width: 560px) {
  .lead__sub, .lead__key { white-space: normal; }
}
.home-intro__body { width: min(480px, 82%); margin-left: 18%; margin-top: clamp(28px, 4vw, 56px); color: var(--text-soft); }
@media (max-width: 880px) { .home-intro__body { width: 100%; margin-left: 0; } }

/* ---------- 11. 筛选栏 ---------- */
.filters {
  display: flex; flex-wrap: wrap; gap: var(--s3) var(--s5);
  padding-block: var(--s4); border-bottom: 1px solid var(--line);
  align-items: flex-end;
}
.filter-group { display: flex; flex-direction: column; gap: 10px; }
.filter-group__label { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--text-faint); }
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  background: none; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 7px 14px; font-size: 13px; cursor: pointer; color: var(--text-soft);
  transition: all 240ms var(--ease);
}
.chip:hover { border-color: var(--rock); color: var(--text); }
.chip.is-active { background: var(--forest-800); border-color: var(--forest-800); color: var(--fog-50); }
.search-field { position: relative; }
.search-field input {
  background: none; border: 0; border-bottom: 1px solid var(--line);
  padding: 8px 0; width: 220px; font-size: 14px;
  transition: border-color 240ms var(--ease);
}
.search-field input:focus { outline: none; border-color: var(--rock); }
.result-bar { display: flex; justify-content: space-between; align-items: center; gap: var(--s3); padding-block: var(--s3) var(--s5); font-size: 13px; color: var(--text-faint); letter-spacing: .06em; }
.empty-state { padding: var(--s7) 0; text-align: center; color: var(--text-faint); }
.empty-state p { font-family: var(--serif); font-size: 22px; }

/* ---------- 12. 播放器 / 课程码 ---------- */
.player {
  position: relative; aspect-ratio: 16 / 9; overflow: hidden;
  background: linear-gradient(150deg, #16241E, #0B100E 70%);
  border: 1px solid var(--line);
  display: grid; place-items: center; text-align: center; color: var(--fog-50);
}
.player__inner { position: relative; z-index: 2; padding: var(--s4); max-width: 46ch; }
.player__icon {
  width: 66px; height: 66px; margin: 0 auto var(--s3);
  border: 1px solid rgba(246,244,239,.34); border-radius: 50%;
  display: grid; place-items: center;
  transition: background 320ms var(--ease), border-color 320ms var(--ease), transform 320ms var(--ease);
}
.player--free .player__icon { cursor: pointer; }
.player--free:hover .player__icon { background: rgba(246,244,239,.1); border-color: var(--fog-50); transform: scale(1.05); }
.player__icon svg { width: 18px; height: 18px; margin-left: 3px; }
.player__label { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: rgba(246,244,239,.7); }
.player__hint { margin-top: 12px; font-size: 13.5px; color: rgba(246,244,239,.5); line-height: 1.6; }
.player__note {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 3;
  padding: 10px 14px; font-size: 10.5px; letter-spacing: .1em;
  color: rgba(246,244,239,.4); border-top: 1px solid rgba(246,244,239,.1);
  background: rgba(11,16,14,.4);
}
.player__lock { font-family: var(--serif); font-size: 26px; margin-bottom: 10px; }

.code-box {
  border: 1px solid var(--line); padding: var(--s4);
  background: rgba(255,255,255,.5);
}
.code-form { display: flex; gap: var(--s2); flex-wrap: wrap; margin-top: var(--s3); }
.code-form input {
  flex: 1 1 200px; background: none; border: 1px solid var(--line);
  padding: 13px 16px; font-size: 15px; letter-spacing: .1em;
  text-transform: uppercase; border-radius: var(--radius);
  transition: border-color 240ms var(--ease);
}
.code-form input:focus { outline: none; border-color: var(--moss); }
.msg { margin-top: var(--s2); font-size: 14px; display: none; }
.msg.is-on { display: block; }
.msg--ok { color: var(--moss); }
.msg--err { color: #A4553F; }

/* ---------- 13. 课程详情布局 ---------- */
.detail { display: grid; grid-template-columns: minmax(0,1fr) 340px; gap: clamp(32px, 5vw, 80px); align-items: start; }
@media (max-width: 980px) { .detail { grid-template-columns: 1fr; } }
.detail__aside { position: sticky; top: 104px; display: flex; flex-direction: column; gap: var(--s3); }
@media (max-width: 980px) { .detail__aside { position: static; } }
.panel { border: 1px solid var(--line); padding: var(--s4); background: rgba(255,255,255,.5); }
.panel h3 { font-size: 18px; }
.panel + .panel { margin-top: 0; }

.list-check { list-style: none; padding: 0; margin: var(--s3) 0 0; display: grid; gap: 14px; }
.list-check li { position: relative; padding-left: 26px; font-size: 15.5px; color: var(--text-soft); }
.list-check li::before {
  content: ''; position: absolute; left: 0; top: .62em;
  width: 12px; height: 1px; background: var(--moss);
}
.syllabus { list-style: none; padding: 0; margin: var(--s3) 0 0; counter-reset: sy; border-top: 1px solid var(--line-soft); }
.syllabus li {
  counter-increment: sy; display: flex; gap: var(--s3); align-items: baseline;
  padding: 16px 0; border-bottom: 1px solid var(--line-soft);
  transition: padding-left 300ms var(--ease);
}
.syllabus li:hover { padding-left: 8px; }
.syllabus li::before {
  content: counter(sy, decimal-leading-zero);
  font-family: var(--serif); font-size: 13px; color: var(--text-faint);
  letter-spacing: .1em; flex: none; width: 26px;
}
.syllabus li span { flex: 1; font-size: 16px; }
.syllabus li em { font-style: normal; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint); }

.prose { max-width: 68ch; }
.prose h2 { font-size: clamp(24px, 3vw, 34px); margin-top: var(--s6); }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 20px; margin-top: var(--s5); }
.prose p { margin-top: var(--s2); color: var(--text-soft); }
.prose ul { color: var(--text-soft); padding-left: 1.2em; }
.prose li { margin-bottom: 8px; }

/* ---------- 14. 表单 ---------- */
.form { display: grid; gap: var(--s4); }
.field { display: flex; flex-direction: column; gap: 10px; }
.field__label { display: flex; align-items: baseline; gap: 10px; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); }
.field__req { color: var(--moss); font-size: 10px; letter-spacing: .1em; }
.field input, .field select, .field textarea {
  background: rgba(255,255,255,.6); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 13px 15px; font-size: 15.5px; width: 100%;
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}
.field textarea { min-height: 128px; resize: vertical; line-height: 1.68; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--moss); background: #fff; }
.field input::placeholder, .field textarea::placeholder { color: var(--stone-400); }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: #A4553F; }
.field__err { display: none; font-size: 13px; color: #A4553F; }
.field.has-error .field__err { display: block; }
.field__hint { font-size: 13px; color: var(--text-faint); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); }
@media (max-width: 620px) { .field-row { grid-template-columns: 1fr; } }
.checkbox { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; color: var(--text-soft); cursor: pointer; }
.checkbox input { width: 17px; height: 17px; margin-top: 4px; flex: none; accent-color: var(--forest-700); }

.confirm { text-align: center; padding: clamp(48px, 8vw, 104px) 0; }
.confirm__seal {
  width: 76px; height: 76px; margin: 0 auto var(--s4);
  border: 1px solid var(--moss); border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 26px; color: var(--moss);
  animation: seal-in 900ms var(--ease) both;
}
@keyframes seal-in { from { opacity: 0; transform: scale(.86); } to { opacity: 1; transform: none; } }
.confirm h2 { font-size: clamp(28px, 4vw, 42px); }
.confirm p { margin-top: var(--s3); color: var(--text-soft); max-width: 46ch; margin-inline: auto; }
.confirm__ref { margin-top: var(--s4); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--text-faint); }
.confirm__ref b { font-family: var(--serif); font-size: 19px; letter-spacing: .1em; color: var(--text); display: block; margin-top: 6px; }

/* ---------- 15. 账户 ---------- */
.auth-card { max-width: 440px; margin-inline: auto; border: 1px solid var(--line); padding: clamp(28px, 4vw, 44px); background: rgba(255,255,255,.6); }
.auth-tabs { display: flex; gap: var(--s3); border-bottom: 1px solid var(--line); margin-bottom: var(--s4); }
.auth-tabs button {
  background: none; border: 0; cursor: pointer; padding: 0 0 14px;
  font-size: 14px; letter-spacing: .06em; color: var(--text-faint);
  border-bottom: 1px solid transparent; margin-bottom: -1px;
}
.auth-tabs button.is-active { color: var(--text); border-bottom-color: var(--forest-800); }
.stat-row { display: flex; gap: var(--s6); flex-wrap: wrap; padding-block: var(--s4); border-bottom: 1px solid var(--line); }
.stat__k { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--text-faint); }
.stat__v { font-family: var(--serif); font-size: 34px; margin-top: 6px; }
.codes-hint { margin-top: var(--s3); font-size: 13.5px; color: var(--text-soft); }
.codes-hint code {
  font-family: var(--sans); letter-spacing: .1em; font-size: 12.5px;
  background: var(--fog-200); padding: 3px 8px; margin-right: 6px; display: inline-block; margin-top: 6px;
}

/* ---------- 16. Footer ---------- */
.site-footer { background: var(--ink); color: rgba(246,244,239,.68); padding-block: clamp(56px, 7vw, 96px) var(--s5); }
.site-footer a:hover { color: var(--fog-50); }
.footer-top { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: var(--s5) var(--s4); }
@media (max-width: 860px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-top { grid-template-columns: 1fr; } }
.footer-brand__mark { font-family: var(--serif); font-size: 30px; letter-spacing: .16em; color: var(--fog-50); }
.footer-brand p { margin-top: var(--s3); font-size: 14px; max-width: 34ch; line-height: 1.7; }
.footer-col h4 { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: rgba(246,244,239,.42); font-family: var(--sans); font-weight: 500; }
.footer-col ul { list-style: none; padding: 0; margin: var(--s3) 0 0; display: grid; gap: 12px; font-size: 14.5px; }
.footer-bottom {
  margin-top: clamp(48px, 6vw, 80px); padding-top: var(--s3);
  border-top: 1px solid rgba(246,244,239,.12);
  display: flex; justify-content: space-between; gap: var(--s3); flex-wrap: wrap;
  font-size: 12.5px; color: rgba(246,244,239,.4);
}
.footer-note { margin-top: var(--s3); font-size: 12.5px; color: rgba(246,244,239,.36); max-width: 78ch; line-height: 1.7; }

/* ---------- 17. 通知条 & Tweaks ---------- */
.notice {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  z-index: 80; display: flex; align-items: center; gap: var(--s3);
  max-width: min(680px, calc(100vw - 32px));
  padding: 13px 18px; background: rgba(11,16,14,.9); color: rgba(246,244,239,.8);
  backdrop-filter: blur(10px); border: 1px solid rgba(246,244,239,.14);
  font-size: 13px; line-height: 1.5;
  animation: mark-in 700ms 1.4s var(--ease) both;
}
.notice button { background: none; border: 1px solid rgba(246,244,239,.3); color: inherit; padding: 6px 12px; font-size: 11.5px; cursor: pointer; flex: none; letter-spacing: .08em; }
.notice button:hover { border-color: var(--fog-50); color: var(--fog-50); }

.tweaks { position: fixed; right: 20px; bottom: 20px; z-index: 85; font-size: 13px; }
.tweaks__toggle {
  width: 40px; height: 40px; border-radius: 50%; cursor: pointer;
  background: rgba(11,16,14,.82); color: var(--fog-50);
  border: 1px solid rgba(246,244,239,.2); backdrop-filter: blur(8px);
  display: grid; place-items: center; transition: transform 300ms var(--ease);
}
.tweaks__toggle:hover { transform: rotate(45deg); }
.tweaks__panel {
  position: absolute; right: 0; bottom: 52px; width: 244px;
  background: rgba(11,16,14,.94); color: rgba(246,244,239,.82);
  border: 1px solid rgba(246,244,239,.16); backdrop-filter: blur(12px);
  padding: var(--s3); display: none;
}
.tweaks.is-open .tweaks__panel { display: block; }
.tweaks__panel h5 { margin: 0 0 var(--s3); font-family: var(--sans); font-size: 10.5px; letter-spacing: .22em; text-transform: uppercase; color: rgba(246,244,239,.45); font-weight: 500; }
.tweak { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); padding-block: 9px; }
.tweak label { font-size: 12.5px; }
.tweak input[type=range] { width: 78px; accent-color: var(--moss-soft); }
.tweak b { font-family: var(--sans); font-weight: 400; font-size: 11px; color: rgba(246,244,239,.55); min-width: 30px; text-align: right; font-variant-numeric: tabular-nums; }
.tweak select { background: rgba(246,244,239,.08); border: 1px solid rgba(246,244,239,.2); color: inherit; font-size: 12px; padding: 4px 6px; }
.tweak input[type=checkbox] { accent-color: var(--moss-soft); width: 15px; height: 15px; }
@media (max-width: 620px) { .tweaks { display: none; } }

/* ---------- 18. Reveal on scroll ---------- */
/* 只在 JS 已接管（data-motion 已写上）时才隐藏，否则 JS 一挂内容就永久不可见 */
html[data-motion] .reveal { opacity: 0; transform: translateY(13px); }
html[data-motion="on"] .reveal { transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
/* 必须比上面那条更具体，否则 is-in 盖不过初始隐藏，内容会永远不可见 */
html[data-motion] .reveal.is-in,
html[data-motion="off"] .reveal { opacity: 1; transform: none; }
html[data-motion="off"] .fog i,
html[data-motion="off"] .hero__video { animation: none; }

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


/* ---- 影像条：器物图集，横向排布、高度错落 ---- */
.strip {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: clamp(10px, 1.4vw, 22px);
  padding-inline: clamp(20px, 5vw, 56px);
  margin-top: clamp(32px, 4vw, 60px);
  align-items: start;
}
@media (max-width: 900px) { .strip { grid-template-columns: repeat(2, 1fr); gap: clamp(14px,3vw,24px); } }
.strip figure { margin: 0; }
.strip figure:nth-child(even) { margin-top: clamp(18px, 3.4vw, 56px); }
.strip__frame { display: block; overflow: hidden; position: relative; }
.strip__img {
  display: block; aspect-ratio: 3 / 4;
  background-size: cover; background-position: center;
  filter: sepia(.2) hue-rotate(184deg) saturate(1.25) contrast(1.08) brightness(.9);
  animation: cover-drift var(--cover-dur, 42s) var(--ease) var(--cover-delay, 0s) infinite alternate;
  transition: filter 1.2s var(--ease);
}
.strip figure:nth-child(even) .strip__img { aspect-ratio: 4 / 5; }
.strip figure:hover .strip__img { filter: sepia(.1) hue-rotate(184deg) saturate(1.45) contrast(1.12) brightness(1); }
.strip__frame::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(14,26,32,.06), rgba(9,16,20,.4));
  mix-blend-mode: multiply;
}
.strip figcaption {
  margin-top: 11px; font-size: 11.5px; letter-spacing: .1em;
  color: var(--text-soft); line-height: 1.5;
}
.strip figcaption b { display: block; font-weight: 500; color: var(--text); letter-spacing: .06em; font-size: 13px; margin-bottom: 3px; }
html[data-motion="off"] .strip__img { animation: none; }


/* ---- 带图区块的具体用图（在本文件里声明，路径相对 assets/css/） ---- */
.photo--stone::before { background-image: url('../media/pages/stone-glyph.jpg'); }
.photo--tea::before   { background-image: url('../media/pages/tea.jpg'); }
.photo--books::before { background-image: url('../media/pages/books.jpg'); }

/* ---------- 19. 登录弹窗 / 账户入口 ---------- */
.auth-slot { display: flex; align-items: center; gap: 10px; }
.auth-btn {
  background: none; border: 1px solid currentColor; cursor: pointer;
  padding: 7px 14px; font-size: 12.5px; letter-spacing: .06em;
  border-radius: var(--radius); opacity: .72;
  transition: opacity 240ms var(--ease), background 240ms var(--ease);
  max-width: 170px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.auth-btn:hover { opacity: 1; }
.auth-btn--admin { background: var(--moss); border-color: var(--moss); color: var(--fog-50); opacity: 1; }
.auth-btn--quiet { border-color: transparent; opacity: .45; }
@media (max-width: 700px) { .auth-btn:not(.auth-btn--admin) { display: none; } }

.modal { position: fixed; inset: 0; z-index: 200; display: none; }
.modal.is-open { display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal__mask { position: absolute; inset: 0; background: rgba(9,14,13,.62); backdrop-filter: blur(4px); }
.modal__box {
  position: relative;
  width: min(440px, 100%); max-height: calc(100vh - 40px); overflow-y: auto;
  background: var(--fog-50); border: 1px solid var(--line);
  padding: clamp(28px, 4vw, 44px);
  box-shadow: var(--shadow-2);
  animation: modal-in 380ms var(--ease) both;
}
@keyframes modal-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.modal__close {
  position: absolute; right: 14px; top: 10px;
  background: none; border: 0; cursor: pointer;
  font-size: 24px; line-height: 1; color: var(--text-faint);
}
.modal__close:hover { color: var(--text); }
.auth-hint { font-size: 12.5px; color: var(--text-faint); line-height: 1.6; }

/* ---------- 20. 后台 ---------- */
.admin-tabs { display: flex; gap: var(--s4); border-bottom: 1px solid var(--line); margin-bottom: var(--s5); flex-wrap: wrap; }
.admin-tabs button {
  background: none; border: 0; cursor: pointer; padding: 0 0 14px;
  font-size: 14.5px; color: var(--text-faint); border-bottom: 1px solid transparent; margin-bottom: -1px;
}
.admin-tabs button.is-active { color: var(--text); border-bottom-color: var(--forest-800); }
.admin-panel { display: none; }
.admin-panel.is-active { display: block; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th {
  text-align: left; font-weight: 500; font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-faint);
  padding: 0 var(--s2) 12px 0; border-bottom: 1px solid var(--line);
}
.tbl td { padding: 14px var(--s2) 14px 0; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.tbl input[type=text], .tbl input[type=url], .tbl select {
  width: 100%; background: rgba(255,255,255,.6); border: 1px solid var(--line);
  padding: 8px 10px; font-size: 13px; border-radius: var(--radius);
}
.tbl input:focus, .tbl select:focus { outline: none; border-color: var(--moss); }
.tbl__ref { font-family: var(--serif); letter-spacing: .06em; white-space: nowrap; }
.tbl-wrap { overflow-x: auto; }
.status-pill { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; padding: 4px 10px; border: 1px solid var(--line); white-space: nowrap; }
.status-pill--pending { border-color: var(--moss); color: var(--moss); }
.status-pill--done { border-color: var(--line); color: var(--text-faint); }
.admin-actions { display: flex; gap: var(--s2); flex-wrap: wrap; margin-bottom: var(--s4); }
.gate { max-width: 460px; margin-inline: auto; text-align: center; padding: clamp(48px,8vw,120px) 0; }


/* ---------- 21. 视频预览到期 ---------- */
.player__gate {
  position: absolute; inset: 0; z-index: 5;
  display: grid; place-items: center; text-align: center;
  background: rgba(9,14,13,.86); backdrop-filter: blur(6px);
  color: var(--fog-50); padding: var(--s4);
  animation: modal-in 420ms var(--ease) both;
}
.player__gate h4 { font-family: var(--brush); font-size: clamp(22px,3vw,32px); font-weight: 400; }
.player__gate p { margin-top: 12px; font-size: 14px; color: rgba(246,244,239,.66); max-width: 40ch; line-height: 1.7; }
.player__gate .btn { margin-top: var(--s3); }
.preview-tag {
  position: absolute; left: 14px; top: 14px; z-index: 4;
  font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
  color: rgba(246,244,239,.72); background: rgba(9,14,13,.5);
  padding: 5px 10px; backdrop-filter: blur(4px);
}
.upload-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.upload-row input[type=file] { font-size: 11.5px; max-width: 170px; }
.file-badge { font-size: 11px; color: var(--moss); letter-spacing: .08em; }


/* ---------- 22. 人生议题导航 ---------- */
.topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: var(--s6);
}
.topic {
  position: relative;
  display: block;
  min-height: 340px;
  padding: var(--s4) var(--s4) var(--s5);
  background: var(--bg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  isolation: isolate;
}
.topic__img {
  position: absolute; inset: 0; z-index: -2;
  background-size: cover; background-position: center;
  filter: sepia(var(--hero-cool,.26)) hue-rotate(184deg) saturate(.85) contrast(1.04) brightness(.9);
  opacity: .16;
  transform: scale(1.02);
  transition: opacity var(--dur) var(--ease), transform 1.2s var(--ease);
}
.topic::after {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(16,26,22,0) 30%, rgba(16,26,22,.86) 100%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.topic__body { position: relative; display: flex; flex-direction: column; height: 100%; }
.topic__label {
  font-size: 10.5px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--text-faint);
  transition: color var(--dur) var(--ease);
}
.topic__q {
  font-family: var(--brush);
  font-size: clamp(26px, 2.5vw, 34px);
  line-height: 1.35;
  font-weight: 400;
  margin-top: var(--s3);
  color: var(--text);
  transition: color var(--dur) var(--ease);
}
.topic__note {
  margin-top: var(--s3);
  font-size: 13.5px; line-height: 1.75;
  color: var(--text-soft);
  max-width: 32ch;
  transition: color var(--dur) var(--ease);
}
.topic__cats {
  margin-top: auto; padding-top: var(--s4);
  font-size: 11px; letter-spacing: .1em;
  color: var(--moss);
  transition: color var(--dur) var(--ease);
}
.topic__cats::before {
  content: ''; display: block; width: 28px; height: 1px;
  background: currentColor; opacity: .5; margin-bottom: 12px;
  transition: width var(--dur) var(--ease);
}
.topic:hover .topic__img,
.topic:focus-visible .topic__img { opacity: .5; transform: scale(1.07); }
.topic:hover::after,
.topic:focus-visible::after { opacity: 1; }
.topic:hover .topic__q,
.topic:focus-visible .topic__q { color: var(--fog-50); }
.topic:hover .topic__label,
.topic:hover .topic__note,
.topic:focus-visible .topic__label,
.topic:focus-visible .topic__note { color: rgba(246,244,239,.72); }
.topic:hover .topic__cats,
.topic:focus-visible .topic__cats { color: var(--moss-soft); }
.topic:hover .topic__cats::before,
.topic:focus-visible .topic__cats::before { width: 56px; }
.topic:focus-visible { outline: 2px solid var(--moss); outline-offset: -4px; }

@media (max-width: 980px) {
  .topics { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .topics { grid-template-columns: 1fr; }
  .topic { min-height: 0; padding: var(--s4) var(--s3); }
  .topic__img { opacity: .3; }
  .topic__cats { padding-top: var(--s3); }
}

.topic-hint {
  margin: calc(var(--s2) * -1) 0 var(--s5);
  font-size: 14px; line-height: 1.8; color: var(--text-soft);
  max-width: 62ch;
  padding-left: var(--s3);
  border-left: 1px solid var(--line);
}
.topic-hint a { color: var(--text); text-decoration: none; border-bottom: 1px solid var(--moss); padding-bottom: 1px; }
.topic-hint a:hover { color: var(--moss); }