/* ==========================================================================
   天天娱乐 · 中国区内容中心
   共享样式表 /assets/site.css
   视觉系统：技术蓝图秩序 × 草原矿物色彩
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 矿物色 */
  --c-grass: #0E3B3A;
  --c-moss: #1F5C4A;
  --c-mist: #7FA9A0;
  --c-gold: #C98A2E;
  --c-gold-soft: #F2D9A6;
  --c-clay: #A8452A;
  --c-cream: #FAF6EE;
  --c-sand: #EFE6D6;
  --c-stone: #4A5259;
  --c-ink: #17211F;

  /* 文字层 */
  --t-on-dark: #CFE3DE;
  --t-on-dark-soft: #9FBEB8;
  --line-dark: rgba(127, 169, 160, 0.34);
  --line: rgba(127, 169, 160, 0.42);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

  /* 字号阶梯 12 / 14 / 17 / 22 / 28 / 40 / 64 / 120 */
  --fs-12: 12px;
  --fs-14: 14px;
  --fs-17: 17px;
  --fs-22: 22px;
  --fs-28: 28px;
  --fs-40: 40px;
  --fs-64: 64px;
  --fs-120: 120px;

  /* 布局 */
  --wrap: 1180px;
  --gutter: clamp(20px, 4vw, 44px);
  --rule: 96px;

  /* 不等圆角 */
  --r-a: 16px 5px 16px 5px;
  --r-b: 5px 18px 5px 18px;
  --r-c: 20px 20px 6px 20px;

  --shadow-lift: 0 16px 34px -20px rgba(14, 59, 58, 0.6);
  --ease: cubic-bezier(0.22, 0.7, 0.35, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100%;
  color: var(--c-stone);
  background-color: var(--c-cream);
  background-image:
    repeating-linear-gradient(to right, rgba(127, 169, 160, 0.11) 0 1px, transparent 1px var(--rule)),
    repeating-linear-gradient(to bottom, rgba(127, 169, 160, 0.11) 0 1px, transparent 1px var(--rule));
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.85;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

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

button { font-family: inherit; }

/* ---------- 3. 中文排版基线 ---------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  color: var(--c-ink);
  line-height: 1.25;
  letter-spacing: 0.01em;
  font-weight: 600;
}

h1 { font-size: clamp(30px, 4.6vw, 54px); font-weight: 900; }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }
h4 { font-size: var(--fs-22); }

p { margin: 0 0 1.2em; }

strong { color: var(--c-ink); }

a {
  color: var(--c-moss);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

a:hover { color: var(--c-gold); }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

:focus-visible {
  outline: 3px solid var(--c-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

main { display: block; scroll-margin-top: 108px; }

#main-content { display: block; }

/* ---------- 4. 容器与正文 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose { max-width: 68ch; }
.prose ul,
.prose ol { list-style: disc; padding-left: 1.5em; margin: 0 0 1.2em; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.45em; }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -90px;
  z-index: 200;
  padding: 11px 18px;
  background: var(--c-gold);
  color: var(--c-ink);
  font-size: var(--fs-14);
  font-weight: 600;
  border-radius: 12px 4px 12px 4px;
  box-shadow: var(--shadow-lift);
  transition: top 0.18s var(--ease);
}

.skip-link:focus {
  top: 16px;
  color: var(--c-ink);
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 2px solid transparent;
  border-radius: 14px 5px 14px 5px;
  font-size: var(--fs-14);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s var(--ease),
              background-color 0.18s var(--ease),
              border-color 0.18s var(--ease),
              color 0.18s var(--ease);
}

.btn--gold {
  background: var(--c-gold);
  color: var(--c-ink);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: var(--c-gold-soft);
  color: var(--c-ink);
  transform: translateY(-2px);
}

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-cream);
  border-bottom: 1px solid var(--line);
}

/* 上层：深青 */
.header-top {
  background-color: var(--c-grass);
  background-image: repeating-linear-gradient(
    to right,
    rgba(127, 169, 160, 0.16) 0 1px,
    transparent 1px 72px
  );
  color: var(--c-cream);
}

.header-top__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-block: 14px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  background: var(--c-gold);
  color: var(--c-ink);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.06em;
  border-radius: 14px 5px 14px 5px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.09em;
  color: var(--c-cream);
  transition: color 0.18s var(--ease);
}

.brand__line {
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--c-mist);
}

.brand:hover .brand__name,
.brand:focus-visible .brand__name { color: var(--c-gold-soft); }

/* 品牌声明 */
.brand-statement {
  margin: 0 auto 0 0;
  padding-left: 20px;
  max-width: 34ch;
  border-left: 1px solid var(--line-dark);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--t-on-dark);
  letter-spacing: 0.03em;
}

/* 快捷入口 */
.utility-nav { min-width: 0; }

.utility-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.utility-nav__link {
  display: inline-block;
  padding: 7px 12px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--t-on-dark);
  border: 1px solid var(--line-dark);
  border-radius: 10px 3px 10px 3px;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.utility-nav__link:hover,
.utility-nav__link:focus-visible {
  background: rgba(127, 169, 160, 0.2);
  border-color: rgba(242, 217, 166, 0.65);
  color: var(--c-gold-soft);
}

.brand-cta { white-space: nowrap; }

/* 菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-cream);
  background: transparent;
  border: 1px solid rgba(242, 217, 166, 0.55);
  border-radius: 12px 4px 12px 4px;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-toggle:hover { background: rgba(242, 217, 166, 0.14); border-color: var(--c-gold-soft); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background-color 0.18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* 下层：栏目 */
.header-bar { background: var(--c-cream); }

.header-bar .wrap { display: flex; align-items: center; }

.primary-nav { min-width: 0; }

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: clamp(12px, 2.2vw, 32px);
  counter-reset: navidx;
}

.primary-nav__item { display: flex; }

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 14px 2px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--c-stone);
  letter-spacing: 0.02em;
  transition: color 0.18s var(--ease);
}

.primary-nav__link::before {
  counter-increment: navidx;
  content: "0" counter(navidx);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-mist);
  transition: color 0.18s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--c-gold);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible { color: var(--c-grass); }

.primary-nav__link:hover::before,
.primary-nav__link:focus-visible::before { color: var(--c-gold); }

.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] { color: var(--c-ink); font-weight: 600; }
.primary-nav__link[aria-current="page"]::before { color: var(--c-clay); }
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* ---------- 8. 滚动进度条（脚本注入） ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
  z-index: 3;
}

/* ---------- 9. 回到顶部（脚本注入） ---------- */
.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  font-size: 18px;
  line-height: 1;
  color: var(--c-ink);
  background: var(--c-gold);
  border: 2px solid var(--c-grass);
  border-radius: 14px 4px 14px 4px;
  box-shadow: var(--shadow-lift);
  cursor: pointer;
  visibility: hidden;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), background-color 0.18s var(--ease);
}

.to-top[data-visible] {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.to-top:hover { background: var(--c-gold-soft); }

/* ---------- 10. 页脚 ---------- */
.site-footer {
  margin-top: clamp(56px, 8vw, 112px);
  background-color: var(--c-grass);
  background-image: repeating-linear-gradient(
    to right,
    rgba(127, 169, 160, 0.13) 0 1px,
    transparent 1px 72px
  );
  border-top: 4px solid var(--c-gold);
  color: var(--t-on-dark);
}

.footer-ruler {
  height: 13px;
  border-bottom: 1px solid var(--line-dark);
  background-image: repeating-linear-gradient(
    to right,
    rgba(127, 169, 160, 0.5) 0 1px,
    transparent 1px 46px
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(26px, 4vw, 60px);
  padding-block: clamp(44px, 6vw, 76px) clamp(28px, 4vw, 44px);
}

.footer-brand { min-width: 0; }

.footer-brand__mark {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.08em;
  color: var(--c-cream);
}

.footer-brand__summary {
  max-width: 36ch;
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--t-on-dark-soft);
}

.footer-index {
  display: grid;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-dark);
}

.footer-index__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--t-on-dark);
}

.footer-index__no {
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

.footer-col { min-width: 0; }

.footer-heading {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--c-gold-soft);
}

.footer-list { display: grid; gap: 10px; }

.footer-link {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--t-on-dark);
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--c-gold-soft);
  padding-left: 5px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 30px;
  padding-block: 22px;
  border-top: 1px solid var(--line-dark);
}

.footer-contact__line {
  margin: 0;
  font-size: 14px;
  color: var(--t-on-dark);
  letter-spacing: 0.02em;
}

.footer-contact__note {
  flex-basis: 100%;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--t-on-dark-soft);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 34px;
  border-top: 1px solid var(--line-dark);
  font-size: 12.5px;
  color: var(--t-on-dark-soft);
}

.footer-legal__icp,
.footer-legal__copy { margin: 0; letter-spacing: 0.04em; }

/* ---------- 11. 可复用图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  background: var(--c-sand);
  border: 2px solid var(--c-mist);
  border-radius: var(--r-c);
  overflow: hidden;
}

.figure img,
.figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.figure--wide img,
.figure--wide .figure__img { aspect-ratio: 21 / 9; }

.figure--portrait img,
.figure--portrait .figure__img { aspect-ratio: 4 / 5; }

.figure__ph {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  background-color: var(--c-sand);
  background-image: repeating-linear-gradient(
    45deg,
    rgba(127, 169, 160, 0.16) 0 10px,
    transparent 10px 20px
  );
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-mist);
}

.figure__caption {
  display: block;
  padding: 10px 16px 12px;
  border-top: 1px dashed var(--line);
  background: var(--c-sand);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-stone);
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1080px) {
  .brand-statement { display: none; }
}

@media (max-width: 1000px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .header-bar {
    border-top: 1px solid var(--line);
    min-height: 4px;
  }

  .header-bar .wrap { padding-block: 0; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    background: var(--c-grass);
    border-bottom: 3px solid var(--c-gold);
    box-shadow: 0 24px 44px -22px rgba(10, 44, 43, 0.7);
  }

  .primary-nav[data-open] { display: block; }

  .primary-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 6px 20px 20px;
  }

  .primary-nav__item {
    border-top: 1px solid rgba(127, 169, 160, 0.24);
  }

  .primary-nav__item:first-child { border-top: 0; }

  .primary-nav__link {
    width: 100%;
    padding: 15px 6px;
    font-size: 16px;
    color: #D6E8E3;
  }

  .primary-nav__link::after { display: none; }

  .primary-nav__link:hover,
  .primary-nav__link:focus-visible {
    color: var(--c-gold-soft);
    background: rgba(127, 169, 160, 0.12);
  }

  .primary-nav__link[aria-current="page"] {
    color: var(--c-gold-soft);
    background: rgba(201, 138, 46, 0.18);
  }
}

@media (max-width: 760px) {
  .header-top__inner { gap: 10px 14px; }

  .brand { margin-right: auto; }
  .brand__mark { width: 40px; height: 40px; font-size: 14px; }
  .brand__name { font-size: 17px; letter-spacing: 0.06em; }
  .brand__line { display: none; }

  .header-top__inner .utility-nav {
    order: 4;
    flex-basis: 100%;
  }

  .utility-nav__list { gap: 8px; }

  .brand-cta { padding: 9px 14px; font-size: 13px; }

  .footer-ruler { background-size: auto 100%; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }

  .footer-legal { flex-direction: column; align-items: flex-start; }
}

/* ---------- 13. 动效降级 ---------- */
@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;
  }
}