/* ===== W88优德CN 共享样式 /assets/site.css ===== */

/* ---------- Reset 与设计变量 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

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

:root {
  --c-primary: #0A1F44;
  --c-primary-light: #1B3A6B;
  --c-gold: #D4AF37;
  --c-gold-light: #F0D878;
  --c-red: #E8464A;
  --c-bg: #F5F7FA;
  --c-dark: #081226;
  --c-text: #1A1A1A;
  --c-border: #2B3A55;
  --font-head: "Inter var", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --container-w: 1320px;
  --header-h: 100px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 32px rgba(10, 31, 68, 0.14);
  --shadow-strong: 0 20px 60px rgba(4, 12, 30, 0.3);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-head);
  line-height: 1.15;
  font-weight: 800;
  color: var(--c-primary);
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

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

ul[class],
ol[class] {
  list-style: none;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

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

#main-content {
  scroll-margin-top: calc(var(--header-h) + 32px);
}

/* ---------- 可访问性与跳转 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 1000;
  padding: 12px 20px;
  background: var(--c-gold);
  color: var(--c-dark);
  font-weight: 700;
  font-size: 14px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 300;
  background: linear-gradient(90deg, var(--c-gold), var(--c-red));
  transform: scaleX(0);
  transform-origin: 0 50%;
  box-shadow: 0 2px 12px rgba(212, 175, 55, 0.35);
}

/* ---------- 布局 ---------- */
.container {
  width: min(100% - 48px, var(--container-w));
  margin-inline: auto;
}

.section {
  padding-block: 72px;
}

.section--dark {
  background: linear-gradient(135deg, var(--c-primary), var(--c-dark));
  color: #fff;
}

.section--deepdark {
  background: var(--c-dark);
  color: #fff;
}

.section--tint {
  background: linear-gradient(180deg, #FFFFFF, #EEF2F7);
}

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.section-eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--c-gold);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(32px, 4.6vw, 48px);
  letter-spacing: -0.02em;
  margin: 14px 0 12px;
}

.section--dark .section-title,
.section--deepdark .section-title {
  color: #fff;
}

.section-desc {
  font-size: 16px;
  color: rgba(26, 26, 26, 0.72);
  max-width: 60ch;
}

.section--dark .section-desc,
.section--deepdark .section-desc {
  color: rgba(255, 255, 255, 0.72);
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  align-items: center;
  min-height: 72vh;
  padding-block: calc(var(--header-h) + 48px) 80px;
}

.hero .section-title {
  font-size: clamp(42px, 6.4vw, 84px);
  letter-spacing: -0.03em;
}

.hero .section-desc {
  font-size: 18px;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

/* ---------- 头部：悬浮胶囊导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  padding: 16px 24px 0;
  pointer-events: none;
}

.site-header__inner {
  max-width: 1280px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 68px;
  padding: 8px 10px 8px 16px;
  background: linear-gradient(135deg, rgba(10, 31, 68, 0.96), rgba(8, 18, 38, 0.94));
  border: 2px solid rgba(212, 175, 55, 0.42);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  pointer-events: auto;
  transition: box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

body[data-scrolled="true"] .site-header__inner {
  border-color: rgba(212, 175, 55, 0.68);
  box-shadow: 0 24px 64px rgba(4, 12, 30, 0.44);
}

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

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(315deg, var(--c-gold), var(--c-gold-light));
  color: var(--c-dark);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.02em;
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.25), 0 6px 18px rgba(212, 175, 55, 0.3);
}

.site-brand__name {
  display: block;
  color: #fff;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.site-brand__sub {
  display: block;
  color: var(--c-gold-light);
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: 0.04em;
  opacity: 0.85;
}

.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  display: inline-block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1.3;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.site-nav__link:hover {
  color: #fff;
  background: rgba(212, 175, 55, 0.14);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-dark);
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-light));
  font-weight: 800;
  box-shadow: 0 6px 18px rgba(212, 175, 55, 0.35);
}

.site-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.site-nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-gold-light);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 0%, rgba(212, 175, 55, 0.14), transparent 34%),
    linear-gradient(160deg, var(--c-primary) 0%, var(--c-dark) 46%);
  border-top: 4px solid var(--c-gold);
  color: rgba(255, 255, 255, 0.82);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 56px 24px 32px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
}

.site-footer__logo {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 28px;
  line-height: 1.2;
  color: #fff;
  letter-spacing: -0.01em;
}

.site-footer__logo span {
  color: var(--c-gold);
}

.site-footer__slogan {
  margin-top: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-gold);
}

.site-footer__trust {
  margin-top: 14px;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
}

.site-footer__nav,
.site-footer__legal,
.site-footer__contact {
  display: grid;
  align-content: start;
  gap: 14px;
}

.site-footer__h {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 800;
  color: var(--c-gold-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__list {
  display: grid;
  gap: 10px;
}

.site-footer__list a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.site-footer__list a:hover {
  color: var(--c-gold-light);
  padding-left: 4px;
}

.site-footer__contact-line {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer__contact-line + .site-footer__contact-line {
  margin-top: 8px;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.56);
}

.site-footer__bottom span[data-year] {
  color: var(--c-gold-light);
  font-weight: 700;
}

.site-footer__contact-brief {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--gold {
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-light));
  color: var(--c-dark);
  box-shadow: 0 12px 30px rgba(212, 175, 55, 0.35);
}

.btn--gold:hover {
  box-shadow: 0 16px 40px rgba(212, 175, 55, 0.5);
}

.btn--dark {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-card);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.section--dark .btn--ghost,
.section--deepdark .btn--ghost {
  color: var(--c-gold-light);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding-block: 112px 8px;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--c-border);
  margin-inline: 4px;
}

.breadcrumbs__link {
  color: var(--c-primary-light);
  transition: color 0.2s var(--ease);
}

.breadcrumbs__link:hover {
  color: var(--c-gold);
}

.breadcrumbs__item:last-child {
  color: var(--c-primary);
  font-weight: 800;
}

/* ---------- 目录索引 ---------- */
.path-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.path-list__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 24px;
  background: linear-gradient(145deg, var(--c-primary), var(--c-primary-light));
  color: #fff;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  font-weight: 800;
  font-size: 17px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.path-list__link:hover {
  transform: translateY(-5px);
  border-color: var(--c-gold);
  box-shadow: var(--shadow-strong);
}

.path-list__arrow {
  color: var(--c-gold);
  font-size: 22px;
  transition: transform 0.2s var(--ease);
}

.path-list__link:hover .path-list__arrow {
  transform: translateX(6px);
}

/* ---------- 标签、统计、标题 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

.pill--gold {
  background: rgba(212, 175, 55, 0.14);
  color: var(--c-gold);
  border: 1px solid rgba(212, 175, 55, 0.45);
}

.pill--red {
  background: rgba(232, 70, 74, 0.12);
  color: var(--c-red);
  border: 1px solid rgba(232, 70, 74, 0.4);
}

.pill--light {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.stat {
  display: grid;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1;
  color: var(--c-primary);
  font-variant-numeric: tabular-nums;
}

.stat__value--gold {
  color: var(--c-gold);
}

.stat__value--red {
  color: var(--c-red);
}

.stat__label {
  font-size: 14px;
  color: var(--c-border);
  font-weight: 600;
}

.section--dark .stat__value {
  color: #fff;
}

.section--dark .stat__value--gold {
  color: var(--c-gold-light);
}

.section--dark .stat__label {
  color: rgba(255, 255, 255, 0.65);
}

.card-title {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-primary);
}

/* ---------- 图片占位容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, var(--c-primary-light), var(--c-dark));
  border: 2px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.image-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.image-frame--portrait::before {
  padding-top: 125%;
}

.image-frame--square::before {
  padding-top: 100%;
}

.image-frame__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.image-frame__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 1;
}

/* ---------- 时间轴 / 更新日志 ---------- */
.timeline {
  position: relative;
  display: grid;
  gap: 28px;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 10px;
  width: 3px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-primary-light), var(--c-red));
  border-radius: 3px;
}

.timeline__item {
  position: relative;
  padding-bottom: 4px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 3px solid var(--c-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.25);
}

.timeline__date {
  display: block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  text-transform: uppercase;
}

.timeline__content h3 {
  font-size: 20px;
  margin: 4px 0 6px;
}

.timeline__content p {
  font-size: 15px;
  color: rgba(26, 26, 26, 0.75);
  max-width: 62ch;
}

/* ---------- 标签页 ---------- */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 2px solid rgba(43, 58, 85, 0.22);
  margin-bottom: 24px;
}

.tabs__button {
  appearance: none;
  padding: 12px 22px;
  font-weight: 700;
  font-size: 15px;
  color: var(--c-primary-light);
  border-radius: var(--radius-pill) var(--radius-pill) 0 0;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.tabs__button:hover {
  color: var(--c-primary);
  background: rgba(10, 31, 68, 0.06);
}

.tabs__button[aria-selected="true"] {
  color: var(--c-primary);
  border-bottom-color: var(--c-gold);
  background: linear-gradient(180deg, rgba(212, 175, 55, 0.12), transparent);
}

.tabs__panel {
  animation: tab-fade 0.25s var(--ease);
}

@keyframes tab-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 装饰与动效 ---------- */
.gradient-mesh {
  background:
    radial-gradient(circle at 12% 18%, rgba(212, 175, 55, 0.18), transparent 34%),
    radial-gradient(circle at 88% 8%, rgba(27, 58, 107, 0.55), transparent 42%),
    radial-gradient(circle at 70% 80%, rgba(232, 70, 74, 0.1), transparent 30%),
    linear-gradient(150deg, var(--c-primary) 0%, var(--c-dark) 100%);
  color: #fff;
}

.stripe-band {
  height: 10px;
  background: repeating-linear-gradient(
    -45deg,
    var(--c-gold) 0 14px,
    var(--c-dark) 14px 28px
  );
  border-block: 2px solid var(--c-dark);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.orb--gold {
  background: radial-gradient(circle, rgba(212, 175, 55, 0.5), transparent 70%);
}

.orb--red {
  background: radial-gradient(circle, rgba(232, 70, 74, 0.4), transparent 70%);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

[data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
}

@media (max-width: 920px) {
  .site-header {
    padding: 12px 16px 0;
  }

  .site-header__inner {
    flex-wrap: wrap;
    border-radius: 28px;
    padding: 8px 10px 8px 14px;
  }

  .site-nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    order: 3;
    margin-top: 4px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }

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

  .site-nav__list {
    flex-direction: column;
    gap: 6px;
    padding-bottom: 12px;
  }

  .site-nav__link {
    display: block;
    text-align: center;
    padding: 12px 16px;
    font-size: 15px;
  }
}

@media (max-width: 820px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding-block: 48px;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .breadcrumbs {
    padding-top: 92px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 32px, var(--container-w));
  }

  .hero {
    min-height: 0;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__inner {
    padding: 40px 20px 24px;
  }
}

@media (max-width: 400px) {
  .site-brand__sub {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}