/* ============================================================
   博赢官网 · 共享样式表 /assets/site.css
   reset · tokens · 中文排版 · 头部 · 页脚 · 通用组件
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: #101C3D;
  color: #F4F7FD;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid #F5A03C; outline-offset: 3px; }

/* ---------- tokens ---------- */
:root {
  --ink: #101C3D;
  --night: #0A1229;
  --panel: #25335C;
  --mist: #1B2748;
  --amber: #F5A03C;
  --amber-deep: #C97A17;
  --celadon: #4FB3A0;
  --paper: #E8ECF5;
  --fg: #F4F7FD;
  --fg-dim: #A6B2CC;
  --mark: #FFD9A0;
  --line: rgba(88, 112, 170, .42);
  --line-soft: rgba(88, 112, 170, .22);
  --cut-sm: 10px;
  --cut-md: 16px;
  --cut-lg: 26px;
  --shell: min(1280px, calc(100% - clamp(32px, 6vw, 72px)));
  --gap: clamp(16px, 2vw, 26px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font-display: "Barlow Condensed", "Oswald", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 页面底纹（工业网格 + 顶部斜向轨迹） ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(88, 112, 170, .13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 112, 170, .13) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(130% 90% at 78% -12%, #000 0%, transparent 70%);
  mask-image: radial-gradient(130% 90% at 78% -12%, #000 0%, transparent 70%);
  opacity: .75;
}
main, .site-footer { position: relative; z-index: 1; }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--fg);
  text-wrap: balance;
}
h1 { font-size: clamp(34px, 4.6vw, 62px); line-height: 1.05; }
h2 { font-size: clamp(22px, 2.2vw, 32px); font-weight: 700; line-height: 1.2; }
h3 { font-size: clamp(18px, 1.5vw, 22px); font-weight: 700; line-height: 1.28; }
h4 { font-size: 16px; font-weight: 700; line-height: 1.4; }
p { margin: 0 0 1em; font-size: 16px; line-height: 1.85; max-width: 34em; color: var(--fg); }
p:last-child { margin-bottom: 0; }
.mono {
  font-family: var(--font-mono);
  font-size: .92em;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--mark);
  font-variant-numeric: tabular-nums;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--fg-dim);
  text-transform: uppercase;
}
.vertical-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .32em;
  color: var(--fg-dim);
  margin: 0;
}
.lead { font-size: 17px; line-height: 1.85; color: var(--fg); }

/* ---------- 布局工具 ---------- */
.shell { width: var(--shell); margin-inline: auto; }
.section { padding-block: clamp(40px, 5vw, 72px); }
.section--tight { padding-block: clamp(22px, 3vw, 38px); }
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.stack { display: flex; flex-direction: column; gap: var(--gap); }
.stack--tight { gap: 10px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.trail {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--amber), rgba(245, 160, 60, 0) 70%);
  opacity: .7;
}

/* ---------- 面板与模块 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2vw, 26px);
  background: linear-gradient(150deg, rgba(37, 51, 92, .88), rgba(27, 39, 72, .58));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--cut-md)) 0, 100% var(--cut-md), 100% 100%, 0 100%);
}
.panel--accent { border-color: rgba(245, 160, 60, .5); }
.panel--paper { background: var(--paper); border-color: transparent; color: var(--ink); }
.panel--paper p, .panel--paper .lead { color: var(--ink); }
.panel--paper .panel-title, .panel--paper h2, .panel--paper h3 { color: var(--ink); }
.panel--paper .mono { color: #8A5A0C; }
.panel-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.28;
}

/* ---------- 按钮与标签 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  background: rgba(37, 51, 92, .7);
  color: var(--fg);
  font: 600 14px/1.1 var(--font-body);
  letter-spacing: .04em;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease), transform .24s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--amber); border-color: var(--amber); color: #141C33; }
.btn--primary:hover { background: #FFB75F; border-color: #FFB75F; }
.btn--ghost { background: rgba(27, 39, 72, .5); }
.btn--ghost:hover { border-color: var(--amber); color: var(--mark); background: rgba(245, 160, 60, .12); }
.btn--small { padding: 8px 14px; font-size: 13px; }
.btn:focus-visible, .nav-link:focus-visible, .brand:focus-visible,
.nav-toggle:focus-visible, .footer-link:focus-visible, .label:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--mark);
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line-soft);
  font: 600 12px/1.4 var(--font-body);
  letter-spacing: .08em;
  color: var(--fg-dim);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}
.label--amber { color: var(--mark); border-color: rgba(245, 160, 60, .45); }
.label--celadon { color: var(--celadon); border-color: rgba(79, 179, 160, .45); }

/* ---------- 面包屑 ---------- */
.breadcrumb { margin: 0 0 18px; font: 500 12px/1.4 var(--font-body); letter-spacing: .08em; }
.breadcrumb-list { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.breadcrumb-item { display: flex; align-items: center; gap: 10px; color: var(--fg-dim); }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  font-family: var(--font-mono);
  color: var(--amber);
}
.breadcrumb-item[aria-current="page"] { color: var(--fg); }
.breadcrumb-link { color: var(--fg-dim); transition: color .2s var(--ease); }
.breadcrumb-link:hover { color: var(--mark); }

/* ---------- 图像容器（页面阶段直接放图） ---------- */
.figure {
  position: relative;
  margin: 0;
  background: var(--mist);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - var(--cut-md)) 0, 100% var(--cut-md), 100% 100%, 0 100%);
}
.figure img, .figure svg { width: 100%; height: 100%; object-fit: cover; }
.figure--wide { aspect-ratio: 16 / 9; }
.figure--square { aspect-ratio: 1 / 1; }
.figure--frame { aspect-ratio: 16 / 10; }
.figure--frame img { object-fit: contain; padding: clamp(10px, 1.4vw, 20px); }
.figure--diagram {
  aspect-ratio: 4 / 3;
  background-image:
    linear-gradient(rgba(88, 112, 170, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 112, 170, .22) 1px, transparent 1px);
  background-size: 28px 28px;
}
.figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--fg-dim);
}

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .44s var(--ease), transform .44s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-copy] { cursor: pointer; }
[data-copy][data-copied="true"] { color: var(--celadon); border-color: rgba(79, 179, 160, .6); }

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: linear-gradient(180deg, rgba(10, 18, 41, .98), rgba(16, 28, 61, .95));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.skip-link {
  position: absolute;
  left: 14px;
  top: -70px;
  z-index: 99;
  padding: 10px 16px;
  background: var(--amber);
  color: #101C3D;
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* 状态条 */
.topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  padding: 7px clamp(16px, 3vw, 34px);
  background: var(--night);
  border-bottom: 1px solid var(--line-soft);
  font: 500 12px/1.3 var(--font-body);
  letter-spacing: .06em;
  color: var(--fg-dim);
}
.topline-list { display: flex; align-items: center; gap: 18px; overflow: hidden; }
.topline-item { display: flex; align-items: center; gap: 7px; white-space: nowrap; }
.topline-item--ok { color: var(--celadon); }
.topline-domain { margin: 0; font-size: 12px; white-space: nowrap; }
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 179, 160, .16);
  animation: status-pulse 2.4s ease-in-out infinite;
}
@keyframes status-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }

/* 品牌 + 栏目 */
.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 10px clamp(16px, 3vw, 34px);
}
.brand-block { display: flex; align-items: center; gap: 16px; min-width: 0; }
.brand { display: flex; flex-direction: column; gap: 5px; }
.brand-mark {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 2.4vw, 30px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--fg);
}
.brand-mark-en {
  font-style: normal;
  font-size: .5em;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--amber);
  padding: 3px 6px;
  border: 1px solid rgba(245, 160, 60, .45);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--fg-dim);
}
.brand-rail {
  writing-mode: vertical-rl;
  height: 62px;
  margin: 0;
  padding-left: 9px;
  border-left: 1px solid var(--line-soft);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .32em;
  color: var(--fg-dim);
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  position: relative;
  z-index: 90;
  padding: 10px 13px;
  border: 1px solid var(--line);
  background: rgba(27, 39, 72, .7);
  font: 600 13px/1 var(--font-body);
  letter-spacing: .08em;
  color: var(--fg);
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
}
.nav-toggle-bars {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--amber);
  box-shadow: 0 -6px 0 var(--amber), 0 6px 0 var(--fg-dim);
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: var(--celadon);
  box-shadow: 0 -6px 0 var(--celadon), 0 6px 0 var(--celadon);
}
.masthead-side { display: flex; align-items: center; gap: clamp(14px, 2vw, 26px); }
.nav-cluster { display: block; }
.nav-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px 9px 10px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(37, 51, 92, .55), rgba(27, 39, 72, .2));
  color: var(--fg);
  font: 600 14px/1.2 var(--font-body);
  letter-spacing: .02em;
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), rgba(245, 160, 60, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s var(--ease);
}
.nav-link:hover {
  background: linear-gradient(120deg, rgba(245, 160, 60, .16), rgba(37, 51, 92, .5));
  border-color: rgba(245, 160, 60, .4);
  color: var(--mark);
}
.nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  background: linear-gradient(120deg, rgba(245, 160, 60, .2), rgba(37, 51, 92, .55));
  border-color: rgba(245, 160, 60, .5);
  color: var(--mark);
}
.nav-num { font-size: 11px; color: var(--amber); }
.nav-link[aria-current="page"] .nav-num { color: var(--celadon); }
.nav-text { white-space: nowrap; }
.masthead-actions { display: flex; flex-direction: column; gap: 6px; }

/* 阅读进度条 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: rgba(37, 51, 92, .6);
  overflow: hidden;
}
.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--amber), var(--celadon));
  transition: transform .12s linear;
}

/* 遮罩（仅窄屏启用） */
.nav-scrim { display: none; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(56px, 7vw, 110px);
  background: linear-gradient(180deg, var(--night), #070D1E);
  border-top: 1px solid var(--line);
}
.footer-shell {
  width: var(--shell);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) 0 clamp(20px, 3vw, 32px);
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 1.6fr);
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: clamp(26px, 3.4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
}
.footer-brand { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.footer-tagline { margin: 0; font-size: 15px; color: var(--fg-dim); max-width: 22em; }
.footer-cta { margin-top: 4px; }
.footer-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.footer-col-title {
  position: relative;
  margin: 0;
  padding-top: 12px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--fg);
}
.footer-col-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 2px;
  background: var(--amber);
}
.footer-links { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.footer-link {
  display: inline-block;
  padding-left: 0;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-dim);
  transition: color .22s var(--ease), padding-left .22s var(--ease), border-color .22s var(--ease);
}
.footer-link:hover { color: var(--mark); padding-left: 8px; border-left-color: var(--amber); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--line-soft);
}
.footer-contact-line { margin: 0; font-size: 14px; line-height: 1.8; color: var(--fg); max-width: none; }
.footer-contact-note { margin: 0; font-size: 13px; color: var(--fg-dim); max-width: 46em; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: clamp(16px, 2vw, 24px);
}
.footer-legal, .footer-year { margin: 0; font-size: 12px; letter-spacing: .06em; color: var(--fg-dim); }
.footer-year .mono { color: var(--fg-dim); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; }

  .masthead-side {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 80;
    width: min(380px, 88vw);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 24px;
    padding: 100px 24px 32px;
    background: linear-gradient(160deg, var(--night), #0B1430 60%, var(--panel));
    border-left: 1px solid var(--line);
    box-shadow: -24px 0 60px rgba(4, 8, 20, .55);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform .36s var(--ease);
  }
  .masthead-side[data-open="true"] { transform: none; }

  .nav-list { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--line-soft); }
  .nav-item { border-bottom: 1px solid var(--line-soft); }
  .nav-link {
    padding: 16px 4px 16px 12px;
    border: 0;
    background: none;
    clip-path: none;
    font-size: 17px;
  }
  .nav-link::after {
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--amber), rgba(245, 160, 60, 0));
    transform: scaleY(0);
    transform-origin: top center;
  }
  .nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleY(1); }

  .masthead-actions { flex-direction: column; gap: 10px; }
  .masthead-actions .btn { width: 100%; }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 75;
    background: rgba(5, 9, 20, .72);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s var(--ease);
  }
  .nav-scrim[data-open="true"] { opacity: 1; pointer-events: auto; }

  html.is-nav-open { overflow: hidden; }
}

@media (max-width: 900px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }
}

@media (max-width: 760px) {
  body { font-size: 15.5px; }
  .brand-rail { display: none; }
  .topline-item:nth-child(2) { display: none; }
  .topline-domain { display: none; }
  .topline-list { gap: 14px; }
  .masthead { padding-top: 8px; padding-bottom: 8px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .nav-toggle-label { display: none; }
  p { max-width: none; }
}

/* ============================================================
   reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  .scroll-progress-bar { transition: none; }
}