/* ==========================================================================
   C7娱乐站 · 共享样式表 /assets/site.css
   墨黑基底 · 暗金刻度 · 左侧品牌轨道 · 切角面板
   ========================================================================== */

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

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

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

:where(h1, h2, h3, h4) { font-weight: 300; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #07070B;
  --obsidian: #12121A;
  --graphite: #1C1C28;
  --gold: #C8A24A;
  --champagne: #F2D9A0;
  --violet: #7C4DFF;
  --electric: #2FD0FF;
  --amber: #FF8A3D;
  --text: #E8E6F0;
  --muted: #9A97AD;
  --line: #2A2A38;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
                  "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular",
               Consolas, "Liberation Mono", monospace;

  --fs-12: 12px;
  --fs-13: 13px;
  --fs-16: 16px;
  --fs-18: 18px;
  --fs-24: 24px;
  --fs-32: 32px;
  --fs-48: 48px;
  --fs-72: 72px;

  --header-h: 60px;
  --rail-w: 88px;
  --rail-w-open: 240px;
  --max-w: 1360px;
  --measure: 68ch;
  --cut: 18px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- 3. Base ---------- */
body {
  position: relative;
  min-height: 100vh;
  padding-top: var(--header-h);
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(680px 520px at 84% -8%, rgba(124, 77, 255, 0.16), transparent 62%),
    radial-gradient(600px 460px at 6% 104%, rgba(200, 162, 74, 0.13), transparent 60%),
    radial-gradient(460px 400px at 48% 42%, rgba(47, 208, 255, 0.06), transparent 66%);
}

main {
  position: relative;
  z-index: 1;
  display: block;
}

::selection {
  background: rgba(255, 138, 61, 0.32);
  color: #FFF6EA;
}

/* ---------- 4. Typography utilities ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(44px, 9vw, 148px);
  line-height: 0.95;
  letter-spacing: 0.03em;
  background: linear-gradient(176deg, var(--champagne) 4%, var(--gold) 52%, #8C6F2C 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--champagne);
}

@supports not ((background-clip: text) or (-webkit-background-clip: text)) {
  .display {
    background: none;
    color: var(--champagne);
    -webkit-text-fill-color: currentColor;
  }
}

.lead {
  max-width: 48ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--electric);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--amber);
  box-shadow: 0 0 8px rgba(255, 138, 61, 0.7);
}

.eyebrow--gold { color: var(--gold); }
.eyebrow--gold::before { background: var(--gold); box-shadow: none; }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.tick-line {
  height: 1px;
  border: 0;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 12px);
}

/* ---------- 5. Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 56px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.reading {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
}

.reading__index {
  position: sticky;
  top: 80px;
  align-self: start;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--muted);
}

.reading__body {
  min-width: 0;
  max-width: var(--measure);
}

.reading__body p + p { margin-top: 1.1em; }

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease),
              color 0.2s var(--ease), border-color 0.2s var(--ease), filter 0.2s var(--ease);
}

.btn--primary {
  background: var(--amber);
  color: #160B02;
  font-weight: 600;
}
.btn--primary:hover { background: #FFA05E; transform: translateY(-2px); }

.btn--gold {
  background: linear-gradient(135deg, var(--champagne), var(--gold));
  color: #17120A;
  font-weight: 600;
}
.btn--gold:hover { filter: brightness(1.1); transform: translateY(-2px); }

.btn--ghost {
  border-color: var(--line);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 7. Breadcrumbs ---------- */
.breadcrumbs { padding-block: 20px; }

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

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-13);
  color: var(--muted);
}

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

.breadcrumbs a { transition: color 0.2s var(--ease); }
.breadcrumbs a:hover { color: var(--electric); }

/* ---------- 8. Panel / tag / band ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: linear-gradient(160deg, var(--graphite), var(--obsidian));
  border: 1px solid var(--line);
  clip-path: polygon(22px 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%, 0 22px);
}

.panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(242, 217, 160, 0.55), rgba(242, 217, 160, 0));
  pointer-events: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  border: 1px solid var(--line);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

.band {
  position: relative;
  display: flex;
  gap: clamp(16px, 2.4vw, 32px);
  padding-bottom: 14px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.band > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.band::-webkit-scrollbar { height: 3px; }
.band::-webkit-scrollbar-track { background: var(--line); }
.band::-webkit-scrollbar-thumb { background: var(--gold); }

/* ---------- 9. Media ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
  background:
    radial-gradient(120% 120% at 12% 0%, rgba(124, 77, 255, 0.24), transparent 58%),
    radial-gradient(120% 140% at 88% 100%, rgba(47, 208, 255, 0.18), transparent 60%),
    linear-gradient(150deg, var(--graphite), var(--obsidian));
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--champagne);
  background: rgba(7, 7, 11, 0.72);
  border-left: 2px solid var(--amber);
}

.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

/* ---------- 10. Data table ---------- */
.table-scroll { overflow-x: auto; }

.data-table {
  width: 100%;
  min-width: 520px;
  font-size: 15px;
}

.data-table caption {
  padding-bottom: 12px;
  font-size: var(--fs-13);
  color: var(--muted);
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom-color: var(--gold);
  white-space: nowrap;
}

.data-table tbody tr { transition: background-color 0.2s var(--ease); }
.data-table tbody tr:hover { background: rgba(200, 162, 74, 0.05); }

.data-table .num,
.data-table [data-count] { color: var(--electric); }

.data-table .num--hot,
.data-table [data-hot] { color: var(--amber); }

/* ---------- 11. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #160B02;
  background: var(--amber);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 12. Header / rail ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 80;
  height: var(--header-h);
  background: linear-gradient(180deg, rgba(7, 7, 11, 0.97), rgba(7, 7, 11, 0.86));
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.rail {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #17120A;
  background: linear-gradient(140deg, var(--champagne), var(--gold));
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.brand-mark--lg {
  width: 46px;
  height: 46px;
  font-size: 16px;
}

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

.brand-name {
  display: block;
  font-size: 15px;
  line-height: 1.3;
  letter-spacing: 0.1em;
  color: var(--text);
}

.brand-line {
  display: none;
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--muted);
}

@media (min-width: 560px) {
  .brand-line { display: block; }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text);
  border: 1px solid var(--line);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--amber);
  transition: transform 0.24s var(--ease);
}

.nav-toggle-icon::before { top: 1px; }
.nav-toggle-icon::after { bottom: 1px; }

.site-header[data-open] .nav-toggle-icon::before { transform: translateY(4px) rotate(45deg); }
.site-header[data-open] .nav-toggle-icon::after { transform: translateY(-4px) rotate(-45deg); }

.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  max-height: calc(100dvh - var(--header-h));
  padding: 18px 16px 28px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(180deg, var(--obsidian), var(--ink) 92%);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease), visibility 0.26s linear;
}

.site-header[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item { display: block; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  font-size: 16px;
  color: var(--text);
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-num {
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.nav-text { white-space: nowrap; }

.nav-link:hover {
  color: var(--champagne);
  background: rgba(200, 162, 74, 0.06);
}

.nav-link[aria-current="page"] {
  color: var(--champagne);
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.14), transparent 72%);
}

.nav-link[aria-current="page"] .nav-num { color: var(--amber); }

.rail-cta {
  display: block;
  margin-top: 20px;
  padding: 13px 18px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-align: center;
  color: #17120A;
  background: linear-gradient(135deg, var(--champagne), var(--gold));
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: filter 0.2s var(--ease), transform 0.2s var(--ease);
}

.rail-cta:hover { filter: brightness(1.1); transform: translateY(-2px); }

.rail-ticks { display: none; }

/* ---------- 13. Desktop rail ---------- */
@media (min-width: 1024px) {
  :root { --header-h: 0px; }

  body { padding-left: var(--rail-w); }

  .site-header {
    inset: 0 auto 0 0;
    width: var(--rail-w);
    height: 100dvh;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(18, 18, 26, 0.96), rgba(7, 7, 11, 0.97));
    overflow: hidden;
    transition: width 0.28s var(--ease);
  }

  .site-header:hover,
  .site-header:focus-within { width: var(--rail-w-open); }

  .rail {
    width: var(--rail-w-open);
    height: 100%;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 24px 0 22px;
  }

  .brand { gap: 14px; padding: 0 22px; }
  .brand-mark { width: 44px; height: 44px; }
  .brand-copy { overflow: hidden; }
  .brand-line { white-space: normal; }

  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    max-height: none;
    margin-top: 40px;
    padding: 0;
    overflow: visible;
    background: none;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
    transition: none;
  }

  .nav-list { padding: 0 10px; gap: 2px; }

  .nav-link {
    padding: 11px 10px 11px 12px;
    font-size: 15px;
  }

  .nav-num { min-width: 24px; font-size: 12px; }

  .rail-cta {
    margin: auto 16px 0;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
  }

  .site-header:hover .rail-cta,
  .site-header:focus-within .rail-cta {
    opacity: 1;
    transform: none;
  }

  .rail-ticks {
    display: block;
    position: absolute;
    left: 9px;
    top: 50%;
    width: 2px;
    height: 168px;
    transform: translateY(-50%);
    background: repeating-linear-gradient(180deg, var(--gold) 0 1px, transparent 1px 10px);
    opacity: 0.45;
    pointer-events: none;
  }

  .reading__index { top: 56px; }
}

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 10vw, 140px);
  overflow: hidden;
  background: var(--obsidian);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 162, 74, 0.7), transparent);
}

.site-footer::after {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 460px;
  height: 460px;
  pointer-events: none;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.18), transparent 66%);
}

.footer-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) repeat(3, minmax(120px, 0.7fr));
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(48px, 7vw, 88px) clamp(32px, 4vw, 52px);
}

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

.footer-brand-name {
  margin-top: 16px;
  font-size: 16px;
  letter-spacing: 0.12em;
  color: var(--text);
}

.footer-brand-line {
  max-width: 24ch;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.footer-col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.footer-list a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -12px;
  width: 0;
  height: 1px;
  background: var(--amber);
  transform: translateY(-50%);
  transition: width 0.2s var(--ease);
}

.footer-list a:hover { color: var(--champagne); }
.footer-list a:hover::before { width: 8px; }

.footer-meta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 32px;
  padding-block: 24px 40px;
  border-top: 1px solid var(--line);
}

.footer-contact,
.footer-legal {
  font-size: var(--fs-13);
  line-height: 1.8;
  color: var(--muted);
}

.footer-contact { color: var(--text); }

.footer-legal .num { color: var(--muted); }

/* ---------- 15. Motion states ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--violet), var(--electric) 46%, var(--amber));
  pointer-events: none;
}

/* ---------- 16. Focus ---------- */
:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---------- 17. Responsive grid ---------- */
@media (max-width: 1023px) {
  .grid-12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (max-width: 899px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
  .reading { grid-template-columns: 1fr; }
  .reading__index { position: static; }
}

@media (max-width: 639px) {
  .grid-12 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
  body { font-size: 15px; line-height: 1.8; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* ---------- 18. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.12s !important;
  }

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

  .site-header,
  .site-nav { transition: none !important; }
}