/* ============================================================
   星空体育主站 · 共享样式 /assets/site.css
   深空底 + 彗星尾迹 + 赛场橙红，连续画布，无卡片堆叠
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li,
figure, figcaption, blockquote, dl, dd, fieldset {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --void: #070B18;
  --deep: #0F1A33;
  --steel: #1E2A44;
  --comet: #E9F6F8;
  --trail: #4FD8E0;
  --violet: #8A6BFF;
  --ember: #FF5A2B;
  --amber: #FFB020;
  --cream: #F3EBDD;
  --ink: #241C16;

  --font-head: "Archivo Expanded", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "Roboto Mono", ui-monospace, monospace;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-18: 18px;
  --fs-24: 24px;
  --fs-32: 32px;
  --fs-44: 44px;
  --fs-72: 72px;

  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 44px);
  --hair: 1px solid var(--steel);
  --hair-soft: 1px solid rgba(30, 42, 68, 0.85);
  --radius: 2px;
  --t-fast: 0.22s ease;
  --t-mid: 0.4s cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  min-height: 100%;
  background-color: var(--void);
  color: var(--comet);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  word-break: break-word;
  overflow-wrap: anywhere;
  background-image:
    radial-gradient(circle at 18% 6%, rgba(79, 216, 224, 0.10), transparent 42%),
    radial-gradient(circle at 84% 2%, rgba(138, 107, 255, 0.14), transparent 46%),
    radial-gradient(circle at 50% 120%, rgba(255, 90, 43, 0.08), transparent 55%),
    radial-gradient(1.6px 1.6px at 24px 36px, rgba(233, 246, 248, 0.55) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 128px 92px, rgba(233, 246, 248, 0.38) 50%, transparent 51%),
    radial-gradient(1.6px 1.6px at 212px 178px, rgba(79, 216, 224, 0.42) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 318px 62px, rgba(233, 246, 248, 0.30) 50%, transparent 51%);
  background-size: auto, auto, auto, 340px 340px, 340px 340px, 340px 340px, 340px 340px;
  background-repeat: no-repeat, no-repeat, no-repeat, repeat, repeat, repeat, repeat;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 { font-size: clamp(32px, 5.4vw, 64px); }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4 { font-size: var(--fs-18); font-weight: 700; letter-spacing: 0; }

p { max-width: 42em; }

a {
  color: var(--trail);
  text-decoration: none;
}

a:hover { text-decoration: underline; text-underline-offset: 3px; }

strong { font-weight: 700; color: var(--comet); }

.mono,
.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

:focus-visible {
  outline: 2px solid var(--trail);
  outline-offset: 3px;
}

::selection {
  background: var(--ember);
  color: #170A05;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--trail);
  color: var(--void);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-14);
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform var(--t-fast);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--comet);
  outline-offset: 2px;
  text-decoration: none;
}

/* ---------- 5. Header / 刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(7, 11, 24, 0.985) 0%, rgba(7, 11, 24, 0.9) 100%);
  border-bottom: var(--hair);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "masthead" "nav" "bar";
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 16px var(--gutter) 0;
  transition: padding var(--t-mid);
}

/* 报头 */
.masthead {
  grid-area: masthead;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding-bottom: 12px;
}

.masthead__coord {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(233, 246, 248, 0.42);
  white-space: nowrap;
}

.masthead__coord--right { text-align: right; }

.brand {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  color: var(--comet);
  text-decoration: none;
}

.brand:hover { text-decoration: none; }

.brand__mark {
  position: relative;
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, rgba(79, 216, 224, 0), var(--trail) 55%, var(--comet));
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 12px rgba(255, 90, 43, 0.85);
}

.brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  transition: color var(--t-fast);
}

.brand:hover .brand__name { color: var(--trail); }

.brand__line {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--trail);
}

/* 栏目 */
.site-nav {
  grid-area: nav;
  border-top: var(--hair-soft);
  border-bottom: var(--hair-soft);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(4px, 2vw, 26px);
}

.site-nav__list li { display: flex; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 12px 4px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: rgba(233, 246, 248, 0.76);
  border-bottom: 2px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.site-nav__link:hover {
  color: var(--comet);
  text-decoration: none;
  border-bottom-color: rgba(79, 216, 224, 0.6);
}

.site-nav__link[aria-current="page"] {
  color: var(--comet);
  border-bottom-color: var(--ember);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  top: 12px;
  right: -7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
}

/* 状态行 + 常驻入口 */
.site-header__bar {
  grid-area: bar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0 14px;
}

.status-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  max-width: none;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: rgba(233, 246, 248, 0.55);
}

.status-bar__round { color: var(--amber); font-weight: 700; }

.status-bar__sep { color: var(--steel); }

.site-header__cta { white-space: nowrap; }

/* 移动导航按钮 */
.nav-toggle {
  grid-area: toggle;
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 14px;
  border: var(--hair);
  border-radius: var(--radius);
  color: var(--comet);
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
}

.nav-toggle:hover { border-color: var(--trail); color: var(--trail); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-fast), opacity var(--t-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 滚动尾迹 */
.scroll-trail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(30, 42, 68, 0.7);
  overflow: hidden;
}

.scroll-trail__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--trail) 70%, var(--amber));
  transition: width 0.12s linear;
}

/* ---------- 6. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 110px);
  overflow: hidden;
  color: var(--comet);
  border-top: var(--hair);
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(138, 107, 255, 0.18), transparent 62%),
    linear-gradient(180deg, var(--deep) 0%, var(--void) 62%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(30, 42, 68, 0.6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 68, 0.6) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 72%);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 56px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) clamp(28px, 4vw, 52px);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.footer-brand__line {
  margin-top: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--trail);
}

.footer-brand__meta {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 18px;
  max-width: none;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: rgba(233, 246, 248, 0.62);
}

.footer-brand__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 10px rgba(255, 176, 32, 0.9);
  animation: comet-pulse 2.8s ease-in-out infinite;
}

@keyframes comet-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.72); }
}

.footer-brand__cta { margin-top: 22px; }

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

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 34px);
}

.footer-col__title,
.footer-contact__title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: var(--hair-soft);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: rgba(233, 246, 248, 0.5);
}

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

.footer-col__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  font-size: var(--fs-14);
  color: rgba(233, 246, 248, 0.82);
  transition: color var(--t-fast), transform var(--t-fast);
}

.footer-col__list a::before {
  content: "";
  width: 10px;
  height: 1px;
  background: var(--trail);
  opacity: 0.42;
  transition: width var(--t-fast), opacity var(--t-fast);
}

.footer-col__list a:hover {
  color: var(--comet);
  text-decoration: none;
  transform: translateX(3px);
}

.footer-col__list a:hover::before { width: 18px; opacity: 1; }

.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(233, 246, 248, 0.78);
}

.footer-contact__key {
  flex: 0 0 auto;
  min-width: 34px;
  padding-top: 2px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--trail);
}

.site-footer__bar {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 18px var(--gutter) 28px;
  border-top: var(--hair-soft);
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: rgba(233, 246, 248, 0.5);
}

.site-footer__bar p { max-width: none; }

.site-footer__legal { color: rgba(233, 246, 248, 0.62); }

/* ---------- 7. Layout / 容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.split--reverse { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--deep {
  background: linear-gradient(180deg, rgba(15, 26, 51, 0.92), rgba(15, 26, 51, 0.34));
  border-block: var(--hair-soft);
}

.section--cream {
  background: var(--cream);
  color: var(--ink);
}

.section--cream h1,
.section--cream h2,
.section--cream h3,
.section--cream h4,
.section--cream strong { color: var(--ink); }

.section--cream a { color: #A8340C; }

.section--cream .eyebrow { color: #A8340C; }

.section--cream .hairline { background: linear-gradient(90deg, rgba(36, 28, 22, 0.5), rgba(36, 28, 22, 0)); }

.hairline {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(79, 216, 224, 0.55), rgba(30, 42, 68, 0) 72%);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(24px, 3vw, 44px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.28em;
  color: var(--trail);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.75;
}

.lead {
  max-width: 34em;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.7;
  color: rgba(233, 246, 248, 0.82);
}

.section--cream .lead { color: rgba(36, 28, 22, 0.82); }

.prose p { max-width: 42em; margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(233, 246, 248, 0.6);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb li + li::before {
  content: "/";
  color: var(--steel);
}

.breadcrumb a { color: inherit; }

.breadcrumb a:hover { color: var(--trail); text-decoration: none; }

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

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 20px;
  border: var(--hair);
  border-radius: var(--radius);
  background: transparent;
  color: var(--comet);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast),
              color var(--t-fast), transform var(--t-fast);
}

.btn:hover {
  border-color: var(--trail);
  color: var(--trail);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--ember);
  border-color: var(--ember);
  color: #170A05;
}

.btn--primary:hover {
  background: #FF7550;
  border-color: #FF7550;
  color: #170A05;
}

.btn--ghost { color: rgba(233, 246, 248, 0.88); }

.btn--sm {
  min-height: 40px;
  padding: 8px 15px;
  font-size: 13px;
}

/* ---------- 10. 标签 / Chip / 提示块 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 7px 15px;
  border: var(--hair);
  border-radius: 999px;
  background: transparent;
  color: rgba(233, 246, 248, 0.82);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.chip:hover { border-color: var(--trail); color: var(--comet); }

.chip[aria-pressed="true"],
.chip.is-active {
  background: rgba(79, 216, 224, 0.12);
  border-color: var(--trail);
  color: var(--comet);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--violet);
}

.tag--live {
  color: var(--ember);
  animation: live-breathe 3.2s ease-in-out infinite;
}

@keyframes live-breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 216, 224, 0); }
  50% { box-shadow: 0 0 0 4px rgba(79, 216, 224, 0.14); }
}

.callout {
  padding: 18px 22px;
  border-left: 3px solid var(--trail);
  background: rgba(79, 216, 224, 0.07);
}

.callout p { max-width: 46em; }

/* ---------- 11. 数据表 ---------- */
.dtable {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.dtable caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(233, 246, 248, 0.5);
}

.dtable th,
.dtable td {
  padding: 12px 10px;
  border-bottom: var(--hair-soft);
  text-align: left;
  vertical-align: middle;
}

.dtable thead th {
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: rgba(233, 246, 248, 0.55);
  border-bottom-color: var(--steel);
}

.dtable tbody tr:nth-child(odd) { background: rgba(30, 42, 68, 0.28); }

.dtable tbody tr:hover { background: rgba(79, 216, 224, 0.07); }

.dtable td.num,
.dtable th.num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.dtable tr.is-top td:first-child { color: var(--ember); font-weight: 700; }

/* ---------- 12. 可展开内容组 ---------- */
.accordion { border-top: var(--hair-soft); }

.accordion__item { border-bottom: var(--hair-soft); }

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  min-height: 56px;
  padding: 18px 4px;
  text-align: left;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--comet);
  cursor: pointer;
  transition: color var(--t-fast);
}

.accordion__trigger:hover { color: var(--trail); }

.accordion__trigger[aria-expanded="true"] { color: var(--trail); }

.accordion__icon {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  position: relative;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: currentColor;
}

.accordion__icon::before { width: 14px; height: 2px; }
.accordion__icon::after { width: 2px; height: 14px; transition: transform var(--t-fast); }

.accordion__trigger[aria-expanded="true"] .accordion__icon::after { transform: scaleY(0); }

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows var(--t-mid), visibility var(--t-mid);
}

.accordion__panel > div {
  overflow: hidden;
  padding-bottom: 0;
}

.accordion__item[data-open] .accordion__panel,
.accordion__trigger[aria-expanded="true"] + .accordion__panel {
  grid-template-rows: 1fr;
  visibility: visible;
}

.accordion__item[data-open] .accordion__panel > div,
.accordion__trigger[aria-expanded="true"] + .accordion__panel > div {
  padding-bottom: 20px;
}

.accordion__panel p { max-width: 44em; }

/* ---------- 13. 视图切换 ---------- */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: var(--hair-soft);
}

.tabs__tab {
  min-height: 44px;
  padding: 11px 16px;
  border-bottom: 2px solid transparent;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: rgba(233, 246, 248, 0.7);
  cursor: pointer;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.tabs__tab:hover { color: var(--comet); }

.tabs__tab[aria-selected="true"] {
  color: var(--comet);
  border-bottom-color: var(--ember);
}

.tabs__panel { padding-top: 24px; }

/* ---------- 14. 图片容器基础规则 ---------- */
.media {
  position: relative;
  width: 100%;
  margin: 0;
  overflow: hidden;
  border: var(--hair);
  background: linear-gradient(140deg, var(--deep), var(--void) 62%);
}

.media__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.media__frame--wide { aspect-ratio: 21 / 9; }
.media__frame--square { aspect-ratio: 1 / 1; }
.media__frame--tall { aspect-ratio: 3 / 4; }

.media__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 68, 0.7) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 68, 0.7) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.55;
}

.media__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  position: relative;
  z-index: 1;
  padding: 10px 14px;
  border-top: var(--hair-soft);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(233, 246, 248, 0.58);
}

.media__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(14px, 2vw, 24px);
}

.section--cream .media { border-color: rgba(36, 28, 22, 0.2); background: linear-gradient(140deg, #E4D9C6, #F3EBDD 62%); }
.section--cream .media__frame::before { background-image: linear-gradient(rgba(36, 28, 22, 0.14) 1px, transparent 1px), linear-gradient(90deg, rgba(36, 28, 22, 0.14) 1px, transparent 1px); }
.section--cream .media__caption { border-top-color: rgba(36, 28, 22, 0.2); color: rgba(36, 28, 22, 0.66); }

/* ---------- 15. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(-18px, 18px, 0);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

/* ---------- 16. 响应式 ---------- */
@media (min-width: 861px) {
  .site-header.is-condensed .site-header__inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "masthead nav bar";
    align-items: center;
    gap: 0 30px;
    padding-top: 6px;
    padding-bottom: 6px;
  }

  .site-header.is-condensed .masthead {
    grid-template-columns: minmax(0, 1fr);
    padding-bottom: 0;
  }

  .site-header.is-condensed .masthead__coord { display: none; }

  .site-header.is-condensed .brand {
    grid-column: auto;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    text-align: left;
  }

  .site-header.is-condensed .brand__mark { width: 22px; }

  .site-header.is-condensed .brand__name { font-size: 19px; }

  .site-header.is-condensed .brand__line { display: none; }

  .site-header.is-condensed .site-nav { border: 0; }

  .site-header.is-condensed .site-nav__list { gap: clamp(6px, 1.6vw, 22px); }

  .site-header.is-condensed .site-nav__link {
    min-height: 44px;
    padding: 12px 4px;
    font-size: var(--fs-14);
  }

  .site-header.is-condensed .site-nav__link[aria-current="page"]::after { top: 10px; }

  .site-header.is-condensed .site-header__bar {
    justify-content: flex-end;
    padding: 0;
  }

  .site-header.is-condensed .status-bar { display: none; }
}

@media (max-width: 1023px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(28px, 5vw, 40px);
  }

  .split,
  .split--reverse {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  html { scroll-padding-top: 96px; }

  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "masthead toggle"
      "nav nav"
      "bar bar";
    align-items: center;
    padding: 12px var(--gutter) 0;
  }

  .masthead {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding-bottom: 0;
  }

  .masthead__coord { display: none; }

  .brand {
    grid-column: 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    text-align: left;
  }

  .brand__mark { width: 26px; }

  .brand__name { font-size: 22px; }

  .brand__line { font-size: 10px; letter-spacing: 0.2em; }

  .nav-toggle { display: inline-flex; align-self: center; }

  .site-nav {
    display: none;
    margin-top: 10px;
  }

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

  .site-nav__list {
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 0;
  }

  .site-nav__list li { width: 100%; }

  .site-nav__link {
    width: 100%;
    min-height: 52px;
    padding: 14px 2px;
    font-size: var(--fs-16);
    border-bottom: var(--hair-soft);
  }

  .site-nav__list li:last-child .site-nav__link { border-bottom: 0; }

  .site-nav__link[aria-current="page"] { padding-left: 12px; }

  .site-nav__link[aria-current="page"]::after {
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
  }

  .site-header__bar {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 14px 0 16px;
  }

  .status-bar { font-size: 11px; letter-spacing: 0.04em; }

  .site-header__cta { width: 100%; }

  .site-footer__bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 640px) {
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }

  .grid12 { grid-template-columns: minmax(0, 1fr); }

  .section-head { align-items: flex-start; }

  .dtable { font-size: var(--fs-14); }

  .dtable th,
  .dtable td { padding: 10px 6px; }
}

/* ---------- 17. 动效偏好 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}