/* ==========================================================================
   尚牛电竞 · /assets/site.css
   共享外壳：框架式导航、顶部状态条、深夜场馆霓虹配色、通用组件
   ========================================================================== */

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

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

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

ul, ol { margin: 0; padding: 0; }

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

button { font: inherit; color: inherit; }

table { border-collapse: collapse; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --sn-black: #05070C;
  --sn-midnight: #0B1526;
  --sn-steel: #1C2536;
  --sn-cyan: #2BE8C0;
  --sn-flame: #FF5A2B;
  --sn-gold: #F5C542;
  --sn-mist: #E8EDF5;
  --sn-cold: #8A94A6;
  --sn-violet: #7B5CFF;

  --sn-cyan-veil: rgba(43, 232, 192, 0.12);
  --sn-cyan-line: rgba(43, 232, 192, 0.32);
  --sn-flame-veil: rgba(255, 90, 43, 0.14);
  --sn-flame-line: rgba(255, 90, 43, 0.38);
  --sn-gold-veil: rgba(245, 197, 66, 0.14);
  --sn-violet-veil: rgba(123, 92, 255, 0.18);
  --sn-line: rgba(138, 148, 166, 0.20);
  --sn-line-strong: rgba(138, 148, 166, 0.40);
  --sn-text-soft: rgba(232, 237, 245, 0.84);

  /* 尺度 */
  --sn-rail-w: 236px;
  --sn-status-h: 40px;
  --sn-gutter: clamp(20px, 4vw, 64px);
  --sn-max: 1240px;

  --sn-r-sm: 10px;
  --sn-r-md: 18px;
  --sn-r-lg: 28px;
  --sn-r-pill: 999px;

  /* 字体 */
  --sn-font-display: "Barlow Condensed", "Oswald", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sn-font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --sn-font-mono: "JetBrains Mono", "Sarasa Mono SC", "Cascadia Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--sn-black);
  background-image:
    radial-gradient(1200px 620px at 10% -10%, rgba(43, 232, 192, 0.10), transparent 62%),
    radial-gradient(900px 540px at 108% 8%, rgba(255, 90, 43, 0.08), transparent 64%),
    repeating-linear-gradient(to bottom, rgba(232, 237, 245, 0.022) 0 1px, transparent 1px 4px);
  background-attachment: fixed, fixed, fixed;
  color: var(--sn-mist);
  font-family: var(--sn-font-body);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
}

body.sn-nav-locked { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--sn-font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.005em;
}

h1 { font-size: clamp(40px, 8vw, 96px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4 { font-size: 18px; }

p { max-width: 68ch; }

a { color: var(--sn-cyan); text-decoration: none; }
a:hover { color: var(--sn-mist); }

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

::selection { background: var(--sn-cyan); color: var(--sn-black); }

:focus-visible {
  outline: 2px solid var(--sn-cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 4. Skip link ---------- */
.sn-skip {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--sn-r-pill);
  background: var(--sn-cyan);
  color: var(--sn-black);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.18s ease;
}
.sn-skip:focus { transform: translateY(0); color: var(--sn-black); }

/* ---------- 5. 头部根 + 顶部状态条 ---------- */
.sn-header { position: relative; z-index: 120; }

.sn-statusbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--sn-status-h);
  z-index: 140;
  background: linear-gradient(90deg, var(--sn-black) 0%, var(--sn-midnight) 55%, var(--sn-black) 100%);
  border-bottom: 1px solid var(--sn-line);
}

.sn-statusbar__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 100%;
  padding: 0 clamp(12px, 3vw, 28px);
}

.sn-statusbar__live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sn-cyan);
  white-space: nowrap;
}

.sn-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sn-cyan);
  box-shadow: 0 0 10px var(--sn-cyan);
  animation: sn-pulse 2.4s ease-in-out infinite;
}

@keyframes sn-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.42; transform: scale(0.78); }
}

.sn-statusbar__tag {
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sn-cold);
  white-space: nowrap;
}

.sn-quick {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.sn-quick__link {
  padding: 4px 13px;
  border: 1px solid var(--sn-line-strong);
  border-radius: var(--sn-r-pill);
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sn-mist);
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.sn-quick__link:hover {
  color: var(--sn-cyan);
  border-color: var(--sn-cyan-line);
  background: var(--sn-cyan-veil);
}

.sn-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--sn-cyan) 0%, var(--sn-flame) 68%, var(--sn-gold) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.1s linear;
}

/* ---------- 6. 移动导航按钮 ---------- */
.sn-navToggle {
  position: fixed;
  top: calc(var(--sn-status-h) + 10px);
  right: 14px;
  z-index: 150;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border: 1px solid var(--sn-line-strong);
  border-radius: var(--sn-r-pill);
  background: rgba(11, 21, 38, 0.94);
  color: var(--sn-mist);
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.sn-navToggle:hover { border-color: var(--sn-cyan-line); color: var(--sn-cyan); }
.sn-navToggle[aria-expanded="true"] {
  background: var(--sn-cyan);
  border-color: var(--sn-cyan);
  color: var(--sn-black);
}

.sn-navToggle__bars {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 12px;
}
.sn-navToggle__bars::before,
.sn-navToggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}
.sn-navToggle__bars::before { top: 1px; }
.sn-navToggle__bars::after { bottom: 1px; }
.sn-navToggle[aria-expanded="true"] .sn-navToggle__bars::before { transform: translateY(4px) rotate(45deg); }
.sn-navToggle[aria-expanded="true"] .sn-navToggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

.sn-navToggle__label { line-height: 1; }

/* ---------- 7. 框架式左侧导航 ---------- */
.sn-rail {
  position: fixed;
  top: var(--sn-status-h);
  left: 0;
  bottom: 0;
  width: var(--sn-rail-w);
  z-index: 130;
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 28px 22px 24px;
  overflow-y: auto;
  background: linear-gradient(180deg, var(--sn-midnight) 0%, var(--sn-black) 72%);
  border-right: 1px solid var(--sn-line);
}
.sn-rail::before {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  width: 2px;
  height: 130px;
  background: linear-gradient(180deg, var(--sn-cyan), transparent);
}

.sn-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--sn-mist);
}
.sn-brand:hover { color: var(--sn-mist); }

.sn-brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--sn-cyan) 0%, #14b79c 58%, var(--sn-flame) 100%);
  color: var(--sn-black);
  font-family: var(--sn-font-display);
  font-weight: 800;
  font-size: 15px;
  line-height: 1;
  letter-spacing: 0.02em;
  box-shadow: 0 0 24px -8px rgba(43, 232, 192, 0.75);
}

.sn-brand__text { display: flex; flex-direction: column; }

.sn-brand__name {
  font-family: var(--sn-font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.sn-brand__tag {
  margin-top: 2px;
  font-family: var(--sn-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--sn-cold);
}

.sn-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sn-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 14px;
  color: var(--sn-mist);
  font-size: 16px;
  font-weight: 600;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.sn-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 2px;
  background: var(--sn-cyan);
  transform: translateY(-50%);
  transition: height 0.2s ease;
}
.sn-nav__link:hover {
  background: var(--sn-cyan-veil);
  color: var(--sn-mist);
  transform: translateX(2px);
}
.sn-nav__link:hover::before { height: 58%; }

.sn-nav__link[aria-current="page"] {
  background: var(--sn-cyan-veil);
  color: var(--sn-cyan);
}
.sn-nav__link[aria-current="page"]::before {
  height: 58%;
  box-shadow: 0 0 12px var(--sn-cyan);
}

.sn-nav__idx {
  font-family: var(--sn-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--sn-cold);
}
.sn-nav__link[aria-current="page"] .sn-nav__idx { color: var(--sn-cyan); }

.sn-nav__label { line-height: 1.3; }

.sn-rail__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--sn-line);
}

.sn-rail__note {
  font-family: var(--sn-font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sn-cold);
  max-width: none;
}

/* ---------- 8. 按钮 ---------- */
.sn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--sn-r-pill);
  font-family: var(--sn-font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.sn-btn:hover { transform: translateY(-2px); }

.sn-btn--primary {
  background: linear-gradient(120deg, var(--sn-cyan) 0%, #19c9a6 100%);
  color: #04150f;
  box-shadow: 0 14px 32px -16px rgba(43, 232, 192, 0.95);
}
.sn-btn--primary:hover { color: #04150f; box-shadow: 0 20px 40px -16px rgba(43, 232, 192, 1); }

.sn-btn--hot {
  background: linear-gradient(120deg, var(--sn-flame) 0%, #e63d12 100%);
  color: #1a0600;
  box-shadow: 0 14px 32px -16px rgba(255, 90, 43, 0.9);
}
.sn-btn--hot:hover { color: #1a0600; }

.sn-btn--ghost {
  background: transparent;
  border-color: var(--sn-line-strong);
  color: var(--sn-mist);
}
.sn-btn--ghost:hover {
  color: var(--sn-cyan);
  border-color: var(--sn-cyan-line);
  background: var(--sn-cyan-veil);
}

.sn-btn--block { width: 100%; }

.sn-btn--sm { padding: 9px 18px; font-size: 13.5px; }

/* ---------- 9. 内容容器与网格 ---------- */
.sn-main {
  display: block;
  min-height: 100vh;
  padding-top: var(--sn-status-h);
}

@media (min-width: 1024px) {
  .sn-main { margin-left: var(--sn-rail-w); }
  .sn-navToggle { display: none; }
}

.sn-container {
  width: 100%;
  max-width: var(--sn-max);
  margin: 0 auto;
  padding: 0 var(--sn-gutter);
}

.sn-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.sn-span-3,
.sn-span-4,
.sn-span-5,
.sn-span-6,
.sn-span-7,
.sn-span-8,
.sn-span-9,
.sn-span-12 { grid-column: span 12; }

@media (min-width: 768px) {
  .sn-span-3 { grid-column: span 3; }
  .sn-span-4 { grid-column: span 4; }
  .sn-span-5 { grid-column: span 5; }
  .sn-span-6 { grid-column: span 6; }
  .sn-span-7 { grid-column: span 7; }
  .sn-span-8 { grid-column: span 8; }
  .sn-span-9 { grid-column: span 9; }
}

/* ---------- 10. 章节骨架 ---------- */
.sn-section {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--sn-line);
}
.sn-section:first-of-type { border-top: 0; }

.sn-section--alt {
  background: linear-gradient(180deg, rgba(11, 21, 38, 0.9) 0%, rgba(5, 7, 12, 0) 100%);
}

.sn-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--sn-cyan);
  text-transform: uppercase;
  max-width: none;
}
.sn-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.75;
}

.sn-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--sn-font-mono);
  font-weight: 700;
  font-size: clamp(56px, 9vw, 128px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: rgba(43, 232, 192, 0.11);
  -webkit-text-stroke: 1px rgba(43, 232, 192, 0.42);
}

.sn-section__title { margin-bottom: 14px; }

.sn-lede {
  font-size: 17.5px;
  line-height: 1.85;
  color: var(--sn-text-soft);
  max-width: 62ch;
}

.sn-hero {
  position: relative;
  padding: clamp(36px, 7vw, 88px) 0 clamp(28px, 5vw, 64px);
}

.sn-hero__title {
  margin-bottom: 18px;
  font-family: var(--sn-font-display);
  font-weight: 800;
  font-size: clamp(46px, 11vw, 148px);
  line-height: 0.9;
  letter-spacing: -0.005em;
}

/* ---------- 11. 卡片与标签 ---------- */
.sn-card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-r-lg);
  background: linear-gradient(160deg, rgba(28, 37, 54, 0.9) 0%, rgba(11, 21, 38, 0.94) 100%);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}
.sn-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px 220px at 100% 0, rgba(43, 232, 192, 0.12), transparent 70%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}
.sn-card:hover {
  transform: translateY(-4px);
  border-color: var(--sn-cyan-line);
  box-shadow: 0 26px 52px -32px rgba(43, 232, 192, 0.6);
}
.sn-card:hover::after { opacity: 1; }

.sn-card--hot { border-color: var(--sn-flame-line); }
.sn-card--hot::after { background: radial-gradient(420px 220px at 100% 0, var(--sn-flame-veil), transparent 70%); }
.sn-card--hot:hover { border-color: var(--sn-flame); box-shadow: 0 26px 52px -32px rgba(255, 90, 43, 0.6); }

.sn-card__title { margin-bottom: 8px; font-size: clamp(20px, 2vw, 24px); }

.sn-card__meta {
  display: block;
  margin-bottom: 10px;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sn-cold);
}

.sn-card__body {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--sn-text-soft);
  max-width: 60ch;
}

.sn-overlap {
  position: relative;
  z-index: 2;
  margin-top: calc(-1 * clamp(16px, 3vw, 40px));
}

.sn-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--sn-cyan-line);
  border-radius: var(--sn-r-pill);
  background: var(--sn-cyan-veil);
  color: var(--sn-cyan);
  font-family: var(--sn-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.sn-tag--flame { border-color: var(--sn-flame-line); background: var(--sn-flame-veil); color: var(--sn-flame); }
.sn-tag--gold { border-color: rgba(245, 197, 66, 0.4); background: var(--sn-gold-veil); color: var(--sn-gold); }
.sn-tag--violet { border-color: rgba(123, 92, 255, 0.45); background: var(--sn-violet-veil); color: #A894FF; }
.sn-tag--plain { border-color: var(--sn-line-strong); background: transparent; color: var(--sn-cold); }

/* ---------- 12. 数据表格 ---------- */
.sn-tableWrap {
  overflow-x: auto;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-r-md);
  background: rgba(11, 21, 38, 0.72);
}

.sn-table {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
}

.sn-table th,
.sn-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--sn-line);
  vertical-align: top;
}

.sn-table thead th {
  font-family: var(--sn-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--sn-cold);
  background: rgba(28, 37, 54, 0.62);
  white-space: nowrap;
}

.sn-table tbody tr { transition: background 0.16s ease; }
.sn-table tbody tr:hover { background: var(--sn-cyan-veil); }
.sn-table tbody tr:last-child td { border-bottom: 0; }

/* ---------- 13. 标签页 ---------- */
.sn-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: fit-content;
  max-width: 100%;
  margin-bottom: 22px;
  padding: 6px;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-r-pill);
  background: rgba(11, 21, 38, 0.76);
}

.sn-tab {
  appearance: none;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: var(--sn-r-pill);
  background: transparent;
  color: var(--sn-cold);
  font-family: var(--sn-font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}
.sn-tab:hover { color: var(--sn-mist); background: rgba(232, 237, 245, 0.06); }
.sn-tab[aria-selected="true"] {
  background: var(--sn-cyan);
  color: #04150f;
  box-shadow: 0 10px 24px -14px rgba(43, 232, 192, 0.95);
}

.sn-panel[hidden] { display: none; }

/* ---------- 14. 折叠面板 ---------- */
.sn-fold {
  margin-bottom: 12px;
  overflow: hidden;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-r-md);
  background: rgba(11, 21, 38, 0.68);
}

.sn-fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  transition: color 0.18s ease, background 0.18s ease;
}
.sn-fold__summary::-webkit-details-marker { display: none; }
.sn-fold__summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--sn-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sn-cyan);
}
.sn-fold__summary:hover { background: var(--sn-cyan-veil); }
.sn-fold[open] .sn-fold__summary {
  color: var(--sn-cyan);
  border-bottom: 1px solid var(--sn-line);
}
.sn-fold[open] .sn-fold__summary::after { content: "−"; }

.sn-fold__body {
  padding: 16px 20px 20px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--sn-text-soft);
}

/* ---------- 15. 列表 / 索引 / 面包屑 ---------- */
.sn-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sn-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--sn-text-soft);
}
.sn-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--sn-cyan);
}

.sn-index {
  position: sticky;
  top: calc(var(--sn-status-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 16px;
  border-left: 1px solid var(--sn-line);
}

.sn-index__title {
  margin-bottom: 8px;
  font-family: var(--sn-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--sn-cold);
  max-width: none;
}

.sn-index__link {
  display: flex;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--sn-cold);
  transition: color 0.18s ease, background 0.18s ease;
}
.sn-index__link:hover { color: var(--sn-mist); background: rgba(232, 237, 245, 0.05); }
.sn-index__link[aria-current="true"] { color: var(--sn-cyan); background: var(--sn-cyan-veil); }
.sn-index__link span {
  font-family: var(--sn-font-mono);
  font-size: 11px;
  opacity: 0.82;
}

.sn-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sn-cold);
  max-width: none;
}
.sn-breadcrumb a { color: var(--sn-cold); }
.sn-breadcrumb a:hover { color: var(--sn-cyan); }
.sn-breadcrumb__sep { opacity: 0.45; }

/* ---------- 16. 图片容器 ---------- */
.sn-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-r-lg);
  background:
    linear-gradient(140deg, rgba(28, 37, 54, 0.96) 0%, rgba(5, 7, 12, 0.96) 100%);
}
.sn-media--wide { aspect-ratio: 21 / 9; }
.sn-media--square { aspect-ratio: 1 / 1; }
.sn-media--tall { aspect-ratio: 3 / 4; }

.sn-media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.sn-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(5, 7, 12, 0) 42%, rgba(5, 7, 12, 0.8) 100%),
    repeating-linear-gradient(to bottom, rgba(232, 237, 245, 0.05) 0 1px, transparent 1px 4px);
}

.sn-media__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sn-mist);
  max-width: calc(100% - 32px);
}

.sn-media__badge {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
}

/* ---------- 17. 页脚 ---------- */
.sn-footer {
  position: relative;
  margin-left: 0;
  padding-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--sn-line);
  background: linear-gradient(180deg, var(--sn-midnight) 0%, var(--sn-black) 74%);
  color: var(--sn-mist);
}
.sn-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: var(--sn-gutter);
  width: 128px;
  height: 2px;
  background: linear-gradient(90deg, var(--sn-cyan), transparent);
}

@media (min-width: 1024px) {
  .sn-footer { margin-left: var(--sn-rail-w); }
}

.sn-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  width: 100%;
  max-width: var(--sn-max);
  margin: 0 auto;
  padding: 0 var(--sn-gutter);
}

@media (min-width: 768px) {
  .sn-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .sn-footer__inner { grid-template-columns: 1.5fr repeat(3, 1fr) 1.3fr; }
}

.sn-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.sn-footer__title {
  font-family: var(--sn-font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.3;
  max-width: 26ch;
}

.sn-footer__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sn-cold);
  max-width: 34ch;
}

.sn-footer__colTitle {
  margin-bottom: 14px;
  font-family: var(--sn-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--sn-cyan);
}

.sn-footer__col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sn-footer__col a {
  font-size: 15px;
  color: var(--sn-cold);
  transition: color 0.18s ease;
}
.sn-footer__col a:hover { color: var(--sn-mist); }

.sn-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sn-contact__key {
  display: block;
  margin-bottom: 2px;
  font-family: var(--sn-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sn-cold);
}

.sn-contact__val {
  display: block;
  font-family: var(--sn-font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--sn-mist);
  word-break: break-all;
}

.sn-contact__val--text {
  font-family: var(--sn-font-body);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--sn-text-soft);
  word-break: normal;
}

.sn-footer__legal {
  margin-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--sn-line);
}

.sn-footer__legalInner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  width: 100%;
  max-width: var(--sn-max);
  margin: 0 auto;
  padding: 16px var(--sn-gutter);
  font-family: var(--sn-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sn-cold);
}

.sn-footer__icp,
.sn-footer__copy { max-width: none; line-height: 1.7; }

/* ---------- 18. 工具类 ---------- */
.sn-mono,
.sn-muted { font-family: var(--sn-font-mono); font-size: 13.5px; color: var(--sn-cold); letter-spacing: 0.02em; }

.sn-accent { color: var(--sn-cyan); }
.sn-flame { color: var(--sn-flame); }
.sn-gold { color: var(--sn-gold); }

.sn-hr {
  height: 1px;
  margin: clamp(28px, 4vw, 48px) 0;
  border: 0;
  background: var(--sn-line);
}

.sn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.sn-stack { display: flex; flex-direction: column; gap: 12px; }

.sn-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 19. 入场动效 ---------- */
.sn-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.sn-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 响应式微调 ---------- */
@media (max-width: 1023px) {
  .sn-rail {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    max-height: 80vh;
    gap: 18px;
    padding: 18px 18px 26px;
    border-right: 0;
    border-top: 1px solid var(--sn-cyan-line);
    border-radius: var(--sn-r-lg) var(--sn-r-lg) 0 0;
    box-shadow: 0 -26px 64px -24px rgba(0, 0, 0, 0.92);
    transform: translateY(102%);
    visibility: hidden;
    transition: transform 0.3s cubic-bezier(0.22, 0.9, 0.24, 1), visibility 0.3s linear;
  }
  .sn-rail::before { display: none; }
  .sn-rail[data-open] {
    transform: translateY(0);
    visibility: visible;
  }
  .sn-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }
  .sn-nav__link { padding: 10px 12px; font-size: 15px; }
  .sn-rail__foot { margin-top: 4px; }
}

@media (max-width: 900px) {
  .sn-statusbar__tag { display: none; }
}

@media (max-width: 560px) {
  .sn-statusbar__live { display: none; }
  .sn-quick { margin-left: 0; }
  .sn-quick__link { padding: 3px 10px; font-size: 11px; }
  .sn-navToggle { padding: 9px 14px; }
  .sn-footer__legalInner { flex-direction: column; }
}

@media (min-width: 768px) {
  .sn-footer__brand { grid-column: span 2; }
}

@media (min-width: 1024px) {
  .sn-footer__brand { grid-column: auto; }
}

/* ---------- 21. 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;
  }

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

  .sn-btn:hover,
  .sn-card:hover,
  .sn-nav__link:hover { transform: none; }
}