/* ========== 1. 重置 ========== */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dt, dd {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

input, select, textarea { font: inherit; }

/* ========== 2. 变量 ========== */
:root {
  --pourpre-deep: #5E0F1B;
  --pourpre: #8C1F2F;
  --or: #C9A227;
  --or-pale: #EBD9A4;
  --blanc-chaud: #F8F3E8;
  --creme: #FCF8F0;
  --encre: #161213;
  --qingdai: #2C4A5A;
  --ambre: #9A5B12;
  --gris: #6B6A66;
  --verre: rgba(252, 248, 240, 0.62);

  --hairline: 1px solid rgba(201, 162, 39, 0.34);
  --hairline-strong: 1px solid rgba(201, 162, 39, 0.58);
  --hairline-light: 1px solid rgba(235, 217, 164, 0.28);

  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-24: 1.5rem;
  --fs-32: 2rem;
  --fs-44: 2.75rem;
  --fs-64: 4rem;
  --fs-88: 5.5rem;

  --spine-w: 96px;
  --rail-w: 216px;
  --shell-max: 1180px;
  --radius: 3px;
}

/* ========== 3. 基础排版 ========== */
body {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--encre);
  background-color: var(--blanc-chaud);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(94, 15, 27, 0.055) 1px, transparent 0),
    radial-gradient(circle at 7px 9px, rgba(201, 162, 39, 0.085) 1px, transparent 0);
  background-size: 14px 14px, 26px 26px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--encre);
}

p { max-width: 38em; }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--or);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--pourpre-deep);
  color: var(--blanc-chaud);
}

/* ========== 4. 跳至主内容 ========== */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  transform: translateY(-130%);
  padding: 12px 22px;
  background: var(--or);
  color: var(--pourpre-deep);
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 0 0 var(--radius) 0;
  pointer-events: auto;
  transition: transform 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--pourpre-deep);
  outline-offset: -4px;
}

/* ========== 5. 头部外壳 ========== */
.site-header {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  pointer-events: none;
}

.site-header > * { pointer-events: auto; }

/* 5.1 品牌脊 */
.brand-spine {
  position: relative;
  flex: 0 0 var(--spine-w);
  width: var(--spine-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 0 24px;
  background: var(--pourpre-deep);
  background-image:
    linear-gradient(180deg, rgba(201, 162, 39, 0.16) 0%, rgba(201, 162, 39, 0) 22%),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 7px);
  color: var(--blanc-chaud);
  border-right: var(--hairline-strong);
  box-shadow: 2px 0 28px rgba(22, 18, 19, 0.22);
  overflow: hidden;
}

.brand-spine::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--or), transparent);
}

.spine-mark {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--or-pale);
  border: 1px solid rgba(235, 217, 164, 0.45);
  border-radius: var(--radius);
  line-height: 1.5;
  white-space: nowrap;
}

.spine-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--blanc-chaud);
}

.spine-label {
  font-size: var(--fs-18);
  letter-spacing: 0.22em;
}

.spine-sub {
  font-family: var(--font-body);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: 0.32em;
  color: rgba(235, 217, 164, 0.82);
}

.spine-rule {
  flex: 1 1 auto;
  width: 1px;
  margin: 20px 0;
  background: linear-gradient(180deg, transparent, var(--or), transparent);
  opacity: 0.7;
}

.spine-member {
  writing-mode: vertical-rl;
  text-orientation: upright;
  padding: 12px 6px;
  font-size: var(--fs-12);
  letter-spacing: 0.22em;
  color: var(--or-pale);
  border: 1px solid rgba(235, 217, 164, 0.5);
  border-radius: var(--radius);
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.spine-member:hover,
.spine-member:focus-visible {
  background: var(--or);
  border-color: var(--or);
  color: var(--pourpre-deep);
}

/* 5.2 栏目轨 */
.nav-rail {
  flex: 0 0 var(--rail-w);
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  padding: 30px 22px 26px;
  background: rgba(252, 248, 240, 0.78);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-left: var(--hairline-strong);
  box-shadow: -12px 0 40px rgba(94, 15, 27, 0.09);
  overflow-y: auto;
}

.rail-kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.26em;
  color: var(--gris);
  padding-bottom: 14px;
  border-bottom: var(--hairline);
  max-width: none;
}

.rail-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 20px;
}

.rail-list a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 20px;
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--encre);
  transition: color 0.22s ease;
}

.rail-list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--or);
  transform: translateY(-50%);
  transition: width 0.26s cubic-bezier(0.22, 0.7, 0.3, 1);
}

.rail-list a:hover,
.rail-list a:focus-visible { color: var(--pourpre); }

.rail-list a:hover::before,
.rail-list a:focus-visible::before { width: 22px; }

.rail-list a[aria-current="page"] {
  color: var(--pourpre-deep);
  font-weight: 600;
}

.rail-list a[aria-current="page"]::before {
  width: 28px;
  background: var(--or);
  height: 2px;
}

.rail-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--pourpre);
  opacity: 0.86;
}

.rail-list a[aria-current="page"] .rail-num { color: var(--pourpre-deep); opacity: 1; }

.rail-cta {
  display: block;
  margin-top: auto;
  padding: 13px 10px;
  text-align: center;
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--blanc-chaud);
  background: var(--pourpre-deep);
  border: 1px solid var(--pourpre-deep);
  border-radius: var(--radius);
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.rail-cta:hover,
.rail-cta:focus-visible {
  background: var(--or);
  border-color: var(--or);
  color: var(--pourpre-deep);
}

/* 5.3 移动开关 */
.nav-toggle {
  display: none;
  position: fixed;
  top: 12px;
  right: 14px;
  z-index: 130;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--blanc-chaud);
  background: rgba(94, 15, 27, 0.2);
  border: 1px solid rgba(235, 217, 164, 0.7);
  border-radius: var(--radius);
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.nav-toggle-bar {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 0.26s ease;
}

.nav-toggle-bar::before { top: -5px; }
.nav-toggle-bar::after { top: 5px; }

.site-header[data-open] .nav-toggle-bar { background: transparent; }
.site-header[data-open] .nav-toggle-bar::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bar::after { transform: translateY(-5px) rotate(-45deg); }

/* ========== 6. 页脚 ========== */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 0;
  padding: 76px 0 44px;
  background: var(--pourpre-deep);
  background-image:
    radial-gradient(circle at 12% 0%, rgba(201, 162, 39, 0.2), transparent 46%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.024) 0 1px, transparent 1px 9px);
  color: var(--blanc-chaud);
  border-top: 1px solid rgba(201, 162, 39, 0.5);
  overflow: hidden;
}

.footer-inner {
  position: relative;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  gap: 44px 56px;
  align-items: start;
}

.footer-index {
  position: absolute;
  top: -34px;
  right: 26px;
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 128px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(235, 217, 164, 0.3);
  user-select: none;
  pointer-events: none;
}

.footer-brand { grid-column: 1; }

.footer-name {
  font-family: var(--font-display);
  font-size: var(--fs-24);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--blanc-chaud);
}

.footer-tag {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: rgba(235, 217, 164, 0.8);
}

.footer-nav {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 32px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--or-pale);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: var(--hairline-light);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col a {
  font-size: var(--fs-14);
  color: rgba(248, 243, 232, 0.82);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--or-pale);
  padding-left: 6px;
}

.footer-contact {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 40px;
  padding-top: 24px;
  border-top: var(--hairline-light);
}

.footer-contact-line {
  font-size: var(--fs-14);
  color: rgba(248, 243, 232, 0.9);
  max-width: none;
  word-break: break-word;
}

.footer-contact-line span {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--or-pale);
}

.footer-meta {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px 28px;
  padding-top: 22px;
  border-top: var(--hairline-light);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: rgba(248, 243, 232, 0.68);
}

.footer-meta p { max-width: none; }

.footer-legal { font-family: var(--font-mono); letter-spacing: 0.1em; }

/* ========== 7. 通用容器与栅格 ========== */
.shell {
  position: relative;
  z-index: 1;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 32px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--or), rgba(201, 162, 39, 0.05));
}

/* ========== 8. 文本组件 ========== */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.26em;
  color: var(--gris);
  max-width: none;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-32);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--encre);
}

.lede {
  font-size: var(--fs-18);
  line-height: 1.85;
  color: var(--gris);
  max-width: 34em;
}

/* ========== 9. 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}

.btn--solid {
  background: var(--pourpre-deep);
  color: var(--blanc-chaud);
  border-color: var(--pourpre-deep);
}

.btn--solid:hover,
.btn--solid:focus-visible {
  background: var(--pourpre);
  border-color: var(--pourpre);
}

.btn--ghost {
  background: transparent;
  color: var(--pourpre-deep);
  border-color: var(--or);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--or-pale);
  border-color: var(--or);
}

.btn--gold {
  background: var(--or);
  color: var(--pourpre-deep);
  border-color: var(--or);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: var(--or-pale);
  border-color: var(--or-pale);
}

/* ========== 10. 面包屑 ========== */
.breadcrumb {
  padding: 26px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--gris);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--or);
  opacity: 0.8;
}

.breadcrumb a { color: var(--gris); transition: color 0.2s ease; }

.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--pourpre); }

.breadcrumb [aria-current="page"] { color: var(--pourpre-deep); }

/* ========== 11. 图片容器 ========== */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(201, 162, 39, 0.42);
  background-color: var(--creme);
  background-image:
    linear-gradient(135deg, rgba(94, 15, 27, 0.08), rgba(201, 162, 39, 0.16)),
    radial-gradient(circle at 3px 3px, rgba(22, 18, 19, 0.07) 1px, transparent 0);
  background-size: auto, 12px 12px;
  aspect-ratio: 16 / 10;
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(252, 248, 240, 0.4);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ========== 12. 筛选按钮组 ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 8px 16px;
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--encre);
  background: rgba(252, 248, 240, 0.62);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(201, 162, 39, 0.45);
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.chip:hover,
.chip:focus-visible {
  border-color: var(--or);
  color: var(--pourpre);
}

.chip[aria-pressed="true"] {
  background: var(--pourpre-deep);
  border-color: var(--pourpre-deep);
  color: var(--blanc-chaud);
}

/* ========== 13. 显现动效 ========== */
html.js-on [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 0.7, 0.3, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

html.js-on [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ========== 14. 桌面布局 ========== */
@media (min-width: 1080px) {
  body {
    padding-left: var(--spine-w);
    padding-right: var(--rail-w);
  }
}

/* ========== 15. 平板与手机（<1080px） ========== */
@media (max-width: 1079px) {
  body { padding-top: 64px; }

  .site-header {
    inset: 0 0 auto 0;
    height: 64px;
    display: block;
    pointer-events: auto;
  }

  .site-header::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 105;
    background: rgba(22, 18, 19, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .site-header[data-open]::after {
    opacity: 1;
    pointer-events: auto;
  }

  .brand-spine {
    width: 100%;
    height: 64px;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    padding: 0 96px 0 20px;
    border-right: 0;
    border-bottom: 1px solid rgba(201, 162, 39, 0.45);
    box-shadow: 0 6px 24px rgba(22, 18, 19, 0.24);
  }

  .brand-spine::after { height: 2px; }

  .spine-mark {
    order: 2;
    padding: 2px 7px;
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  .spine-brand {
    order: 1;
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    margin-top: 0;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
  }

  .spine-label {
    font-size: var(--fs-16);
    letter-spacing: 0.14em;
    white-space: nowrap;
  }

  .spine-sub {
    font-size: 11px;
    letter-spacing: 0.18em;
    white-space: nowrap;
  }

  .spine-rule,
  .spine-member { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-header[data-open] .nav-toggle {
    background: rgba(94, 15, 27, 0.94);
    color: var(--blanc-chaud);
    border-color: rgba(235, 217, 164, 0.55);
  }

  .nav-rail {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 120;
    width: min(320px, 86vw);
    padding: 92px 26px 30px;
    transform: translateX(103%);
    transition: transform 0.34s cubic-bezier(0.22, 0.7, 0.3, 1);
    border-left: var(--hairline-strong);
    box-shadow: -18px 0 60px rgba(22, 18, 19, 0.28);
    background: rgba(252, 248, 240, 0.94);
  }

  .site-header[data-open] .nav-rail { transform: translateX(0); }

  .rail-list a { padding: 13px 0 13px 20px; font-size: var(--fs-16); }

  .rail-cta { margin-top: 28px; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 0 24px;
  }

  .footer-brand,
  .footer-nav,
  .footer-contact,
  .footer-meta { grid-column: 1 / -1; }

  .footer-index { font-size: 92px; top: -22px; right: 16px; }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
}

/* ========== 16. 手机（<720px） ========== */
@media (max-width: 720px) {
  body { font-size: var(--fs-16); line-height: 1.8; }

  .shell { padding: 0 20px; }

  .site-footer { padding: 58px 0 34px; }

  .footer-nav { grid-template-columns: 1fr; gap: 24px; }

  .footer-contact { flex-direction: column; gap: 8px; }

  .footer-meta { grid-template-columns: 1fr; }

  .footer-index { font-size: 68px; top: -12px; opacity: 0.8; }

  .section-title { font-size: var(--fs-24); }

  .lede { font-size: var(--fs-16); }

  .btn { width: 100%; }
}

/* ========== 17. 降低动效 ========== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  html.js-on [data-reveal] {
    opacity: 1;
    transform: none;
  }
}