/* ==========================================================================
   万搏体育主站 · 共享样式表 /assets/site.css
   01 Reset  02 变量  03 排版  04 容器与分区  05 按钮与链接
   06 头部命令栏  07 页脚  08 通用组件  09 响应式  10 动效降级
   ========================================================================== */

/* ---------- 01 Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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; }

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

hr { border: 0; }

/* ---------- 02 变量 ---------- */
:root {
  /* 品牌色 */
  --wb-space: #0B1B33;
  --wb-ink: #06101F;
  --wb-paper: #F4EFE3;
  --wb-paper-deep: #E4DAC6;
  --wb-green: #1FAF6A;
  --wb-orange: #FF6B2C;
  --wb-red: #E5484D;
  --wb-yellow: #F5C542;
  --wb-mist: #8FA6C4;
  --wb-line: #2A3F5C;

  /* 布局 */
  --wb-shell: 1320px;
  --wb-gutter: clamp(16px, 3.2vw, 44px);
  --wb-gap: clamp(16px, 2.2vw, 32px);
  --wb-section-y: clamp(48px, 7vw, 96px);
  --wb-header-h: 66px;

  /* 字体 */
  --wb-font-display: "Alibaba PuHuiTi 3.0", "Source Han Sans SC", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --wb-font-body: "Source Han Sans SC", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --wb-font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace,
    SFMono-Regular, Menlo, Consolas, monospace;

  /* 动效 */
  --wb-dur: 180ms;
  --wb-ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 03 排版 ---------- */
body {
  min-height: 100vh;
  background: var(--wb-space);
  color: var(--wb-paper);
  font-family: var(--wb-font-body);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: .004em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 1024px) {
  body { font-size: 17px; }
}

.wb-h1,
.wb-h2,
.wb-h3 {
  font-family: var(--wb-font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  text-wrap: balance;
}

.wb-h1 { font-size: clamp(36px, 6vw, 82px); }
.wb-h2 { font-size: clamp(28px, 4vw, 52px); line-height: 1.1; letter-spacing: -.018em; }
.wb-h3 { font-size: clamp(20px, 2vw, 26px); line-height: 1.3; font-weight: 800; letter-spacing: -.01em; }

.wb-lead {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.75;
  color: var(--wb-paper);
  max-width: 56ch;
}

.wb-text {
  font-size: 16px;
  line-height: 1.85;
  color: var(--wb-mist);
  max-width: 68ch;
}

.wb-text strong { color: var(--wb-paper); font-weight: 700; }

.wb-mono {
  font-family: var(--wb-font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: .02em;
}

.wb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--wb-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--wb-green);
}

.wb-eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 22px;
  height: 1px;
  background: currentColor;
}

.wb-note {
  font-family: var(--wb-font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .14em;
  color: var(--wb-mist);
}

.wb-note--side {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .34em;
  align-self: flex-start;
}

/* ---------- 04 容器与分区 ---------- */
.wb-shell {
  width: 100%;
  max-width: var(--wb-shell);
  margin-inline: auto;
  padding-inline: var(--wb-gutter);
}

.wb-main {
  display: block;
  background: var(--wb-space);
}

.wb-section {
  padding-block: var(--wb-section-y);
}

.wb-section--tight { padding-block: clamp(28px, 4vw, 52px); }

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

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

.wb-section--paper .wb-text { color: var(--wb-space); }
.wb-section--paper .wb-lead { color: var(--wb-ink); }
.wb-section--paper .wb-note,
.wb-section--paper .wb-eyebrow { color: var(--wb-space); }
.wb-section--paper .wb-tile__text { color: var(--wb-space); }

.wb-rule {
  height: 1px;
  background: var(--wb-line);
  border: 0;
  margin: 0;
}

.wb-section--paper .wb-rule { background: rgba(6, 16, 31, .18); }

/* 网格 */
.wb-grid {
  display: grid;
  gap: var(--wb-gap);
}

.wb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.wb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.wb-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.wb-grid--split { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
.wb-grid--sidebar { grid-template-columns: minmax(0, 264px) minmax(0, 1fr); }

/* ---------- 05 按钮与链接 ---------- */
.wb-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  transform: translateY(-240%);
  background: var(--wb-orange);
  color: var(--wb-ink);
  border: 2px solid var(--wb-ink);
  font-family: var(--wb-font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: transform var(--wb-dur) var(--wb-ease);
}

.wb-skip:focus,
.wb-skip:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--wb-paper);
  outline-offset: 2px;
}

.wb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  background: var(--wb-orange);
  color: var(--wb-ink);
  border: 1px solid var(--wb-orange);
  border-radius: 0;
  font-family: var(--wb-font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  text-align: center;
  cursor: pointer;
  transition:
    filter var(--wb-dur) var(--wb-ease),
    background var(--wb-dur) var(--wb-ease),
    color var(--wb-dur) var(--wb-ease),
    border-color var(--wb-dur) var(--wb-ease);
}

.wb-btn:hover { filter: brightness(1.08); }
.wb-btn:active { transform: translateY(1px); }
.wb-btn:focus-visible { outline: 2px solid var(--wb-paper); outline-offset: 3px; }

.wb-btn--sm {
  min-height: 36px;
  padding: 7px 15px;
  font-size: 13px;
}

.wb-btn--ghost {
  background: transparent;
  color: var(--wb-paper);
  border-color: var(--wb-line);
}

.wb-btn--ghost:hover {
  filter: none;
  border-color: var(--wb-orange);
  color: var(--wb-orange);
}

.wb-btn--paper {
  background: transparent;
  color: var(--wb-ink);
  border-color: var(--wb-ink);
}

.wb-btn--paper:hover {
  filter: none;
  background: var(--wb-ink);
  color: var(--wb-paper);
}

/* ---------- 06 头部命令栏 ---------- */
.wb-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--wb-ink);
  border-bottom: 1px solid var(--wb-line);
}

.wb-scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
  pointer-events: none;
}

.wb-scroll-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--wb-green), var(--wb-orange));
  transition: width 100ms linear;
}

.wb-header__meta {
  background: var(--wb-ink);
  border-bottom: 1px solid var(--wb-line);
  font-family: var(--wb-font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--wb-mist);
}

.wb-header__meta-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 34px;
}

.wb-header__tag {
  color: var(--wb-paper);
  white-space: nowrap;
}

.wb-header__tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 9px;
  background: var(--wb-green);
  vertical-align: 1px;
}

.wb-header__support {
  margin-left: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wb-header__phone {
  flex: 0 0 auto;
  padding-left: 24px;
  border-left: 1px solid var(--wb-line);
  color: var(--wb-paper);
  white-space: nowrap;
}

.wb-header__bar {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: clamp(10px, 1.8vw, 28px);
  min-height: var(--wb-header-h);
}

/* 品牌 */
.wb-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  padding-block: 10px;
}

.wb-brand:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: 4px;
}

.wb-brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--wb-orange);
  color: var(--wb-ink);
  font-family: var(--wb-font-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
}

.wb-brand__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.2;
}

.wb-brand__name {
  font-family: var(--wb-font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--wb-paper);
}

.wb-brand__sub {
  margin-top: 3px;
  font-family: var(--wb-font-mono);
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--wb-mist);
}

.wb-brand--footer { padding-block: 0; }
.wb-brand--footer .wb-brand__mark { width: 42px; height: 42px; font-size: 15px; }

/* 导航 */
.wb-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
}

.wb-nav__list {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.wb-nav__item { display: flex; }

.wb-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 clamp(8px, 1.1vw, 15px);
  border-bottom: 2px solid transparent;
  color: var(--wb-mist);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .01em;
  transition:
    color var(--wb-dur) var(--wb-ease),
    background var(--wb-dur) var(--wb-ease),
    border-color var(--wb-dur) var(--wb-ease);
}

.wb-nav__num {
  font-family: var(--wb-font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .08em;
  color: rgba(143, 166, 196, .55);
  transition: color var(--wb-dur) var(--wb-ease);
}

.wb-nav__label { white-space: nowrap; }

.wb-nav__link:hover {
  color: var(--wb-paper);
  background: rgba(244, 239, 227, .06);
  border-bottom-color: var(--wb-line);
}

.wb-nav__link:hover .wb-nav__num { color: var(--wb-mist); }

.wb-nav__link:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: -3px;
  color: var(--wb-paper);
}

.wb-nav__link[aria-current="page"] {
  color: var(--wb-orange);
  background: rgba(255, 107, 44, .09);
  border-bottom-color: var(--wb-orange);
}

.wb-nav__link[aria-current="page"] .wb-nav__num { color: var(--wb-orange); }

.wb-nav__cta { display: none; }

.wb-header__cta {
  flex: 0 0 auto;
  align-self: center;
}

/* 移动导航按钮 */
.wb-nav-toggle {
  display: none;
  align-self: center;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin-left: auto;
  padding: 0 14px;
  border: 1px solid var(--wb-line);
  color: var(--wb-paper);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  cursor: pointer;
  transition:
    border-color var(--wb-dur) var(--wb-ease),
    color var(--wb-dur) var(--wb-ease);
}

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

.wb-nav-toggle:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: 3px;
}

.wb-nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.wb-nav-toggle__bars > span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition:
    transform var(--wb-dur) var(--wb-ease),
    opacity var(--wb-dur) var(--wb-ease);
}

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

.wb-nav-toggle[aria-expanded="true"] .wb-nav-toggle__bars > span:nth-child(2) {
  opacity: 0;
}

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

/* ---------- 07 页脚 ---------- */
.wb-footer {
  position: relative;
  background: var(--wb-ink);
  color: var(--wb-paper);
  border-top: 1px solid var(--wb-line);
}

.wb-footer__stripe {
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--wb-green) 0 18%,
    var(--wb-line) 18% 42%,
    var(--wb-orange) 42% 66%,
    var(--wb-line) 66% 100%
  );
}

.wb-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.25fr);
  gap: clamp(24px, 3.5vw, 56px);
  padding-block: clamp(40px, 6vw, 76px);
}

.wb-footer__brand { min-width: 0; }

.wb-footer__summary {
  margin-top: 18px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--wb-mist);
}

.wb-footer__col { min-width: 0; }

.wb-footer__title {
  margin-bottom: 16px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--wb-line);
  font-family: var(--wb-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--wb-mist);
}

.wb-footer__links { display: grid; gap: 11px; }

.wb-footer__links a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding-block: 2px;
  font-size: 14px;
  color: var(--wb-paper);
  transition: color var(--wb-dur) var(--wb-ease);
}

.wb-footer__links a::before {
  content: "";
  flex: 0 0 auto;
  width: 5px;
  height: 5px;
  background: var(--wb-line);
  transition: background var(--wb-dur) var(--wb-ease);
}

.wb-footer__links a:hover { color: var(--wb-orange); }
.wb-footer__links a:hover::before { background: var(--wb-orange); }

.wb-footer__links a:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: 3px;
}

.wb-footer__dl {
  display: grid;
  gap: 15px;
}

.wb-footer__item { min-width: 0; }

.wb-footer__dt {
  margin-bottom: 3px;
  font-family: var(--wb-font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--wb-mist);
}

.wb-footer__dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--wb-paper);
  overflow-wrap: anywhere;
}

.wb-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 26px;
  padding-block: 20px;
  border-top: 1px solid var(--wb-line);
  font-family: var(--wb-font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--wb-mist);
}

.wb-footer__icp { color: var(--wb-paper); }

/* ---------- 08 通用组件 ---------- */
/* 面包屑 */
.wb-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 15px;
  border-bottom: 1px solid var(--wb-line);
  font-family: var(--wb-font-mono);
  font-size: 11.5px;
  letter-spacing: .09em;
  color: var(--wb-mist);
}

.wb-crumbs a { transition: color var(--wb-dur) var(--wb-ease); }
.wb-crumbs a:hover { color: var(--wb-orange); }
.wb-crumbs a:focus-visible { outline: 2px solid var(--wb-orange); outline-offset: 3px; }
.wb-crumbs__sep { color: var(--wb-line); }
.wb-crumbs [aria-current="page"] { color: var(--wb-paper); }

.wb-crumbs--paper {
  border-bottom-color: rgba(6, 16, 31, .18);
  color: var(--wb-space);
}

.wb-crumbs--paper__sep,
.wb-crumbs--paper .wb-crumbs__sep { color: rgba(6, 16, 31, .3); }
.wb-crumbs--paper [aria-current="page"] { color: var(--wb-ink); }

/* 数据面板 */
.wb-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2vw, 26px);
  background: rgba(244, 239, 227, .035);
  border: 1px solid var(--wb-line);
  border-radius: 0;
  transition:
    background var(--wb-dur) var(--wb-ease),
    border-color var(--wb-dur) var(--wb-ease);
}

.wb-tile:hover {
  background: rgba(244, 239, 227, .06);
  border-color: rgba(143, 166, 196, .45);
}

.wb-tile--accent { border-left: 3px solid var(--wb-orange); }
.wb-tile--ok { border-left: 3px solid var(--wb-green); }

.wb-tile__index {
  font-family: var(--wb-font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--wb-orange);
}

.wb-tile__title {
  font-family: var(--wb-font-display);
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--wb-paper);
}

.wb-tile__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--wb-mist);
}

.wb-section--paper .wb-tile {
  background: var(--wb-paper-deep);
  border-color: rgba(6, 16, 31, .16);
}

.wb-section--paper .wb-tile:hover {
  border-color: rgba(6, 16, 31, .34);
}

.wb-section--paper .wb-tile__title { color: var(--wb-ink); }

/* 数字块 */
.wb-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--wb-line);
}

.wb-stat__value {
  font-family: var(--wb-font-mono);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  color: var(--wb-orange);
}

.wb-stat__label {
  font-family: var(--wb-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--wb-mist);
}

.wb-section--paper .wb-stat { border-top-color: rgba(6, 16, 31, .16); }
.wb-section--paper .wb-stat__label { color: var(--wb-space); }

/* 语义标签 */
.wb-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  font-family: var(--wb-font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--wb-mist);
}

.wb-tag--green { color: var(--wb-green); }
.wb-tag--orange { color: var(--wb-orange); }
.wb-tag--red { color: var(--wb-red); }
.wb-tag--yellow { color: var(--wb-yellow); }

.wb-card-mark {
  display: inline-block;
  width: 13px;
  height: 19px;
  background: var(--wb-red);
  vertical-align: -3px;
}

.wb-card-mark--yellow { background: var(--wb-yellow); }

/* 可展开内容组 */
.wb-disclosure { border-top: 1px solid var(--wb-line); }
.wb-disclosure:last-child { border-bottom: 1px solid var(--wb-line); }

.wb-disclosure__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 16px 0;
  font-family: var(--wb-font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  color: inherit;
  cursor: pointer;
  transition: color var(--wb-dur) var(--wb-ease);
}

.wb-disclosure__trigger:hover { color: var(--wb-orange); }

.wb-disclosure__trigger:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: 2px;
}

.wb-disclosure__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 1px solid currentColor;
}

.wb-disclosure__icon::before,
.wb-disclosure__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.wb-disclosure__icon::before { width: 8px; height: 1px; }

.wb-disclosure__icon::after {
  width: 1px;
  height: 8px;
  transition:
    opacity var(--wb-dur) var(--wb-ease),
    transform var(--wb-dur) var(--wb-ease);
}

.wb-disclosure__trigger[aria-expanded="true"] .wb-disclosure__icon::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.wb-disclosure__panel {
  max-width: 72ch;
  padding: 2px 0 22px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--wb-mist);
}

.wb-section--paper .wb-disclosure { border-top-color: rgba(6, 16, 31, .16); }
.wb-section--paper .wb-disclosure__panel { color: var(--wb-space); }

/* 图片容器基类 */
.wb-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--wb-line);
  border-radius: 0;
  background-color: var(--wb-space);
  background-image:
    radial-gradient(circle at 18% 20%, rgba(31, 175, 106, .22), transparent 46%),
    radial-gradient(circle at 82% 78%, rgba(255, 107, 44, .2), transparent 52%),
    linear-gradient(160deg, rgba(244, 239, 227, .06), transparent 60%);
}

.wb-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 63, 92, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 63, 92, .55) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .6;
  pointer-events: none;
}

.wb-media > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.wb-media--wide { aspect-ratio: 21 / 9; }
.wb-media--square { aspect-ratio: 1 / 1; }
.wb-media--portrait { aspect-ratio: 3 / 4; }

.wb-media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 8px 12px;
  background: rgba(6, 16, 31, .82);
  color: var(--wb-paper);
  font-family: var(--wb-font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
}

/* 进入视口显现 */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity .55s var(--wb-ease),
    transform .55s var(--wb-ease);
}

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

/* ---------- 09 响应式 ---------- */
@media (max-width: 1240px) {
  .wb-nav__link {
    gap: 5px;
    padding-inline: 9px;
    font-size: 12.8px;
  }
  .wb-nav__num { display: none; }
}

@media (max-width: 1080px) {
  :root { --wb-header-h: 60px; }

  .wb-nav { display: none; }

  .wb-nav[data-open] {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: calc(100vh - var(--wb-header-h));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--wb-ink);
    border-top: 1px solid var(--wb-line);
    border-bottom: 1px solid var(--wb-line);
    box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
  }

  .wb-nav[data-open] .wb-nav__list {
    flex-direction: column;
    align-items: stretch;
    max-width: var(--wb-shell);
    margin-inline: auto;
    padding: 6px var(--wb-gutter) 4px;
  }

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

  .wb-nav[data-open] .wb-nav__link {
    justify-content: flex-start;
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--wb-line);
    border-left: 2px solid transparent;
    font-size: 15px;
    color: var(--wb-mist);
  }

  .wb-nav[data-open] .wb-nav__link:hover {
    background: transparent;
    border-bottom-color: var(--wb-line);
    color: var(--wb-paper);
  }

  .wb-nav[data-open] .wb-nav__num {
    display: inline;
    color: rgba(143, 166, 196, .6);
  }

  .wb-nav[data-open] .wb-nav__link[aria-current="page"] {
    padding-left: 12px;
    border-bottom-color: var(--wb-line);
    border-left-color: var(--wb-orange);
    background: rgba(255, 107, 44, .08);
    color: var(--wb-orange);
  }

  .wb-nav[data-open] .wb-nav__cta {
    display: flex;
    margin: 16px var(--wb-gutter) 18px;
  }

  .wb-nav-toggle { display: inline-flex; }

  .wb-header__cta { display: none; }

  .wb-grid--3,
  .wb-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

  .wb-footer__top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .wb-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .wb-header__meta { display: none; }
  .wb-brand__name { font-size: 16px; }
  .wb-brand__mark { width: 34px; height: 34px; font-size: 13px; }
}

@media (max-width: 720px) {
  .wb-grid--2,
  .wb-grid--3,
  .wb-grid--4 { grid-template-columns: minmax(0, 1fr); }

  .wb-footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .wb-crumbs { font-size: 11px; }
}

@media (max-width: 560px) {
  .wb-nav-toggle { padding: 0 12px; }
  .wb-nav-toggle__label { display: none; }
  .wb-brand__sub { display: none; }
  .wb-btn { min-height: 42px; padding: 9px 18px; }
  .wb-footer__base { font-size: 11px; gap: 6px 18px; }
}

/* ---------- 10 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

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

  .wb-scroll-progress > span { transition: none; }
}