/* ============================================================
   天天娱乐 · 共享站点样式（/assets/site.css）
   赛博夜城夜光轨道 + 纸张叠层卡片
   ============================================================ */

:root {
  --ink-900: #0B0A1F;
  --ink-800: #10243A;
  --wine-900: #3A0F2A;
  --purple: #7B3FF2;
  --blue: #2FB6FF;
  --orange: #FF8A3D;
  --green: #4DFFA6;
  --stardust: #F5F3FF;
  --mist: #A79FC9;
  --amber: #FFD166;

  --grad-brand: linear-gradient(100deg, var(--purple), var(--blue));
  --grad-edge: linear-gradient(180deg, var(--purple), var(--blue) 52%, var(--green));
  --grad-dark: linear-gradient(180deg, var(--ink-900), var(--ink-800) 58%, var(--wine-900));

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;

  --rail-w: 240px;

  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Roboto Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --border-print: 1px solid rgba(167, 159, 201, .30);
  --shadow-card: 0 18px 44px -30px rgba(0, 0, 0, .95);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--stardust);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; }
h1, h2, h3, h4, h5, p, figure, dl, dd, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--stardust); }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 8px;
}

::selection { background: rgba(123, 63, 242, .5); color: #fff; }

#main-content { scroll-margin-top: 84px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

/* ---------- 通用容器与文字 ---------- */
.tt-shell {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: 20px;
}

.tt-section-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--stardust);
}

.tt-prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}
.tt-prose strong { color: var(--stardust); font-weight: 700; }
.tt-prose a { border-bottom: 1px solid rgba(47, 182, 255, .45); }

@media (min-width: 768px) {
  .tt-shell { padding-inline: 32px; }
}

/* ---------- 网格工具 ---------- */
.tt-grid { display: grid; gap: 20px; }
.tt-grid--2 { grid-template-columns: 1fr; }
.tt-grid--3 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .tt-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tt-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .tt-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  top: -80px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 12px 12px;
  background: var(--green);
  color: #04160e;
  font-weight: 800;
  font-size: 14px;
  transition: top .2s ease;
}
.skip-link:focus { top: 0; color: #04160e; }

/* ---------- 页头外壳 ---------- */
.tt-header { position: relative; z-index: 60; }

/* 顶部滚动进度线 */
.tt-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background: rgba(167, 159, 201, .12);
  pointer-events: none;
}
.tt-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--purple), var(--blue) 55%, var(--green));
  box-shadow: 0 0 14px rgba(47, 182, 255, .75);
  transition: width .12s linear;
}

/* ---------- 窄屏吸顶条 ---------- */
.tt-topbar {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: linear-gradient(100deg, rgba(11, 10, 31, .96), rgba(16, 36, 58, .96));
  border-bottom: 1px solid rgba(167, 159, 201, .25);
}
.tt-topbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--stardust);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
}
.tt-topbar__cta {
  margin-left: auto;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--grad-brand);
  box-shadow: 0 10px 22px -14px rgba(123, 63, 242, .95);
  white-space: nowrap;
}
.tt-topbar__cta:hover { color: #fff; }

/* ---------- 左侧版本轨道 ---------- */
.tt-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(84vw, 320px);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 26px 20px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background:
    radial-gradient(120% 55% at 0% 0%, rgba(123, 63, 242, .30), transparent 62%),
    var(--grad-dark);
  border-right: 1px solid rgba(167, 159, 201, .28);
  transform: translateX(-102%);
  visibility: hidden;
  pointer-events: none;
  transition: transform .35s cubic-bezier(.22, 1, .36, 1), visibility .35s ease;
}
.tt-rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  bottom: 0;
  width: 2px;
  background: var(--grad-edge);
  opacity: .8;
}
.tt-rail[data-open] {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

body[data-nav-open="true"] { overflow: hidden; }

.tt-rail__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}
.tt-rail__tagline {
  max-width: 20em;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.tt-rail__nav { flex: 1 1 auto; min-height: 0; }
.tt-rail__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 6px;
}

/* ---------- 品牌标识 ---------- */
.tt-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--stardust);
}
.tt-brand__mark {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--grad-brand);
  box-shadow: inset 0 0 0 1px rgba(245, 243, 255, .22), 0 10px 24px -12px rgba(123, 63, 242, .95);
}
.tt-brand__mark::after {
  content: "";
  position: absolute;
  right: -3px;
  bottom: -3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(11, 10, 31, .92);
}
.tt-brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .02em;
}

/* ---------- 版本印章 ---------- */
.tt-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--amber);
  background: rgba(255, 209, 102, .10);
  border: 1px dashed rgba(255, 209, 102, .55);
  white-space: nowrap;
}

/* ---------- 轨道导航 ---------- */
.tt-nav { display: flex; flex-direction: column; gap: 4px; }
.tt-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  color: var(--mist);
  font-size: 15px;
  font-weight: 500;
  transition: color .2s ease, background .2s ease, border-color .2s ease, transform .25s ease;
}
.tt-nav__link::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(167, 159, 201, .5);
  transition: background .2s ease, box-shadow .2s ease;
}
.tt-nav__link:hover {
  color: var(--stardust);
  background: rgba(123, 63, 242, .16);
  border-color: rgba(47, 182, 255, .42);
  transform: translateX(4px);
}
.tt-nav__link[aria-current="page"] {
  color: #fff;
  font-weight: 700;
  background: linear-gradient(90deg, rgba(123, 63, 242, .55), rgba(47, 182, 255, .18));
  border-color: rgba(47, 182, 255, .55);
}
.tt-nav__link[aria-current="page"]::before {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(77, 255, 166, .16), 0 0 10px rgba(77, 255, 166, .9);
  animation: tt-pulse 2.6s ease-in-out infinite;
}
@keyframes tt-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(77, 255, 166, .18), 0 0 10px rgba(77, 255, 166, .85); }
  50% { box-shadow: 0 0 0 6px rgba(77, 255, 166, .07), 0 0 16px rgba(77, 255, 166, 1); }
}

/* ---------- 按钮 ---------- */
.tt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background .25s ease;
}
.tt-btn--block { width: 100%; }
.tt-btn--primary {
  color: #fff;
  background: var(--grad-brand);
  box-shadow: 0 14px 30px -18px rgba(123, 63, 242, .95);
}
.tt-btn--primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 20px 36px -18px rgba(47, 182, 255, .9);
}
.tt-btn--ghost {
  color: var(--stardust);
  background: rgba(11, 10, 31, .55);
  border-color: rgba(167, 159, 201, .45);
}
.tt-btn--ghost:hover {
  color: var(--stardust);
  border-color: rgba(77, 255, 166, .6);
  transform: translateY(-2px);
}

/* ---------- 移动导航按钮 ---------- */
.tt-nav-toggle {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 96;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 17px;
  border: 1px solid rgba(245, 243, 255, .28);
  border-radius: 999px;
  cursor: pointer;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  background: linear-gradient(100deg, rgba(123, 63, 242, .96), rgba(47, 182, 255, .9));
  box-shadow: 0 16px 34px -18px rgba(47, 182, 255, .95);
  transition: transform .25s ease, box-shadow .25s ease;
}
.tt-nav-toggle:hover { transform: translateY(-2px); }
.tt-nav-toggle__bars { display: grid; gap: 5px; width: 16px; }
.tt-nav-toggle__bars::before,
.tt-nav-toggle__bars::after {
  content: "";
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s ease;
}
.tt-nav-toggle[aria-expanded="true"] .tt-nav-toggle__bars::before { transform: translateY(3.5px) rotate(45deg); }
.tt-nav-toggle[aria-expanded="true"] .tt-nav-toggle__bars::after { transform: translateY(-3.5px) rotate(-45deg); }
.tt-nav-toggle__label { line-height: 1; }

/* ---------- 返回顶部（进度环） ---------- */
.tt-to-top {
  --p: 0deg;
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 96;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  background: conic-gradient(from 0deg, var(--green) 0deg var(--p), rgba(167, 159, 201, .22) var(--p) 360deg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .28s ease, transform .28s ease, visibility .28s ease;
}
.tt-to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.tt-to-top__inner {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 14px;
  line-height: 1;
  color: var(--stardust);
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
}
.tt-to-top:hover .tt-to-top__inner { color: var(--green); }

/* ---------- 桌面端：轨道常驻 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .tt-rail {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-w);
    padding: 32px 22px 26px;
    transform: none;
    visibility: visible;
    pointer-events: auto;
  }
  .tt-topbar { display: none; }
  .tt-nav-toggle { display: none; }
  .tt-progress { left: var(--rail-w); }
}

@media (max-width: 1023px) {
  .tt-rail__tagline { display: none; }
}

/* ---------- 面包屑 ---------- */
.tt-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}
.tt-crumbs__item { display: inline-flex; align-items: center; }
.tt-crumbs__item:not(:last-child)::after {
  content: "/";
  margin: 0 10px;
  color: rgba(167, 159, 201, .5);
}
.tt-crumbs__link { color: var(--mist); }
.tt-crumbs__link:hover { color: var(--green); }
.tt-crumbs [aria-current="page"] { color: var(--stardust); }

/* ---------- 纸张叠层卡片 ---------- */
.tt-card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius);
  border: var(--border-print);
  background: linear-gradient(180deg, rgba(16, 36, 58, .90), rgba(11, 10, 31, .94));
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.tt-card:hover {
  transform: translateY(-6px);
  border-color: rgba(47, 182, 255, .6);
  box-shadow: 0 26px 56px -30px rgba(123, 63, 242, .85);
}
.tt-card__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 8px;
  color: var(--stardust);
}
.tt-card__text { font-size: 15px; line-height: 1.75; color: var(--mist); }

.tt-card--paper {
  background: linear-gradient(180deg, #F5F3FF, #DEDAF2);
  border-color: rgba(11, 10, 31, .22);
  color: #141024;
}
.tt-card--paper .tt-card__title { color: #141024; }
.tt-card--paper .tt-card__text { color: #4A4368; }

/* ---------- 图片容器 ---------- */
.tt-figure {
  position: relative;
  margin: 0;
  min-height: 120px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(167, 159, 201, .32);
  background:
    radial-gradient(100% 80% at 12% 0%, rgba(123, 63, 242, .36), transparent 62%),
    radial-gradient(90% 70% at 100% 100%, rgba(47, 182, 255, .28), transparent 60%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
  box-shadow: 0 26px 60px -40px rgba(0, 0, 0, .95);
}
.tt-figure::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 26px;
  pointer-events: none;
  background: linear-gradient(225deg, rgba(255, 209, 102, .9), rgba(255, 209, 102, 0) 62%);
}
.tt-figure > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tt-figure--wide { aspect-ratio: 16 / 9; }
.tt-figure--tall { aspect-ratio: 3 / 4; }
.tt-figure--square { aspect-ratio: 1 / 1; }
.tt-figure__caption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid rgba(167, 159, 201, .30);
  background: rgba(11, 10, 31, .74);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 数字卡与标签 ---------- */
.tt-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  border-radius: var(--radius);
  border: var(--border-print);
  background: linear-gradient(180deg, rgba(16, 36, 58, .9), rgba(11, 10, 31, .92));
}
.tt-stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}
.tt-stat__label { font-size: 13px; color: var(--mist); }

.tt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--amber);
  border: 1px solid rgba(255, 209, 102, .40);
  background: rgba(255, 209, 102, .08);
}

.tt-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}
.tt-status__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(77, 255, 166, .16);
  animation: tt-breathe 2.4s ease-in-out infinite;
}
@keyframes tt-breathe {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}

/* ---------- 页脚 ---------- */
.tt-footer {
  position: relative;
  margin-top: 64px;
  padding: 52px 0 30px;
  background: var(--grad-dark);
  border-top: 1px solid rgba(167, 159, 201, .25);
}
.tt-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--blue) 45%, var(--green));
  opacity: .85;
}
.tt-footer__inner { position: relative; }

.tt-footer__grid {
  display: grid;
  gap: 32px 28px;
  grid-template-columns: 1fr;
}

.tt-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}
.tt-footer__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 26em;
}

.tt-footer__col { display: block; }
.tt-footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--amber);
}
.tt-footer__list { display: flex; flex-direction: column; gap: 2px; }
.tt-footer__link {
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--mist);
  transition: color .2s ease, transform .2s ease;
}
.tt-footer__link:hover {
  color: var(--stardust);
  transform: translateX(3px);
}

.tt-footer__contact { display: grid; gap: 2px; }
.tt-footer__contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(167, 159, 201, .85);
}
.tt-footer__contact dd {
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--stardust);
  word-break: break-word;
}
.tt-footer__contact dd:last-child { margin-bottom: 0; }

.tt-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px dashed rgba(167, 159, 201, .28);
}
.tt-footer__legal {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 640px) {
  .tt-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .tt-footer__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tt-footer { margin-top: 84px; }
}
@media (min-width: 1280px) {
  .tt-footer__grid {
    grid-template-columns: minmax(220px, 1.3fr) repeat(3, minmax(120px, 1fr)) minmax(200px, 1.2fr);
  }
}

/* ---------- 渐显协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.22, 1, .36, 1);
}
[data-reveal][data-reveal-visible] {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}