/* ===== 多宝体育 Site Kit 共享样式 ===== */

:root {
  --db-bg-void: #0A0E1A;
  --db-bg-panel: #101728;
  --db-bg-carbon: #1A2332;
  --db-accent-blue: #00C6FF;
  --db-accent-green: #00E6A0;
  --db-accent-orange: #FF3D2E;
  --db-text-primary: #F0F4FA;
  --db-text-secondary: #8FA3BF;
  --db-line: #66E0FF;
  --db-shadow: rgba(0, 0, 0, 0.5);
  --db-font-headline: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --db-font-body: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --db-font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --db-container-w: 1200px;
  --db-announce-h: 34px;
  --db-radius: 10px;
  --db-space-1: 8px;
  --db-space-2: 16px;
  --db-space-3: 24px;
  --db-space-4: 32px;
  --db-space-5: 48px;
  --db-space-6: 64px;
  --db-space-7: 96px;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--db-font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--db-text-primary);
  background-color: var(--db-bg-void);
  background-image:
    linear-gradient(rgba(102, 224, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 224, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}

main {
  flex: 1;
  outline: none;
  width: 100%;
}

ul, ol {
  list-style: none;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--db-font-headline);
  font-weight: 700;
  line-height: 1.2;
  color: var(--db-text-primary);
  letter-spacing: 0.01em;
}

:focus-visible {
  outline: 2px solid var(--db-accent-blue);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* ===== 容器与章节 ===== */

.db-container {
  width: min(100% - 40px, var(--db-container-w));
  margin-inline: auto;
}

.db-container--narrow {
  width: min(100% - 40px, 860px);
}

.db-content {
  padding: var(--db-space-6) 0;
}

.db-section {
  position: relative;
  padding: var(--db-space-6) 0;
}

.db-section--stacked {
  margin-top: 8px;
}

.db-section--stacked::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.42), transparent);
  pointer-events: none;
}

.db-section--tight {
  padding: var(--db-space-4) 0;
}

.db-section__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: var(--db-space-3);
}

.db-section__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  font-family: var(--db-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--db-accent-green);
  text-transform: uppercase;
}

.db-section__eyebrow::before {
  content: "";
  flex: none;
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--db-accent-blue), var(--db-accent-green));
}

.db-section__title {
  font-family: var(--db-font-headline);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--db-text-primary);
}

/* ===== 通用按钮 ===== */

.db-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--db-font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--db-bg-void);
  background: var(--db-accent-blue);
  border: 0;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.db-btn:hover {
  background: #33D4FF;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 198, 255, 0.28);
}

.db-btn--green {
  background: var(--db-accent-green);
}

.db-btn--green:hover {
  background: #28F0B2;
  box-shadow: 0 10px 24px rgba(0, 230, 160, 0.25);
}

.db-btn--orange {
  background: var(--db-accent-orange);
  color: #ffffff;
}

.db-btn--orange:hover {
  background: #FF5A3C;
  box-shadow: 0 10px 24px rgba(255, 61, 46, 0.3);
}

.db-btn--ghost {
  background: transparent;
  color: var(--db-text-primary);
  box-shadow: inset 0 0 0 1px rgba(102, 224, 255, 0.35);
}

.db-btn--ghost:hover {
  background: rgba(0, 198, 255, 0.08);
  box-shadow: inset 0 0 0 1px var(--db-accent-blue);
}

.db-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ===== 面包屑 ===== */

.db-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 13px;
  color: var(--db-text-secondary);
}

.db-breadcrumb a {
  color: var(--db-text-secondary);
  transition: color 0.2s ease;
}

.db-breadcrumb a:hover {
  color: var(--db-accent-blue);
}

.db-breadcrumb__sep {
  font-family: var(--db-font-mono);
  font-size: 12px;
  color: rgba(143, 163, 191, 0.5);
}

.db-breadcrumb [aria-current="page"] {
  color: var(--db-text-primary);
}

/* ===== 头部 ===== */

.db-skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 500;
  padding: 10px 20px;
  font-family: var(--db-font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--db-bg-void);
  background: var(--db-accent-blue);
  border-radius: 4px;
  transition: top 0.2s ease;
}

.db-skip-link:focus {
  top: 12px;
}

.db-site-header {
  position: relative;
  z-index: 200;
  flex: none;
  padding-top: var(--db-announce-h);
  background: linear-gradient(180deg, var(--db-bg-void) 0%, var(--db-bg-panel) 100%);
  border-bottom: 1px solid rgba(102, 224, 255, 0.14);
}

.db-announce {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--db-announce-h);
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 16px;
  background: linear-gradient(90deg, var(--db-bg-void) 0%, var(--db-bg-panel) 45%, var(--db-bg-carbon) 100%);
  border-bottom: 1px solid rgba(102, 224, 255, 0.2);
  overflow: hidden;
}

.db-announce::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: -12%;
  width: 22%;
  background: linear-gradient(105deg, rgba(0, 198, 255, 0) 30%, rgba(0, 198, 255, 0.12) 50%, rgba(0, 230, 160, 0.08) 60%, transparent 82%);
  transform: skewX(-15deg);
  pointer-events: none;
}

.db-announce__dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--db-accent-green);
  box-shadow: 0 0 8px rgba(0, 230, 160, 0.6);
  animation: db-blink 1.8s ease-in-out infinite;
}

.db-announce__text {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(240, 244, 250, 0.9);
}

@keyframes db-blink {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 8px rgba(0, 230, 160, 0.7);
  }
  50% {
    opacity: 0.3;
    box-shadow: 0 0 2px rgba(0, 230, 160, 0.2);
  }
}

.db-masthead__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 18px 0 14px;
}

.db-masthead__side {
  display: flex;
  align-items: center;
  min-width: 0;
}

.db-masthead__side--left {
  justify-content: flex-start;
}

.db-masthead__side--right {
  justify-content: flex-end;
  gap: 12px;
}

.db-masthead__center {
  min-width: 0;
  text-align: center;
}

.db-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  vertical-align: middle;
}

.db-brand__mark {
  flex: none;
  width: 34px;
  height: 34px;
  position: relative;
  background: linear-gradient(135deg, var(--db-accent-blue) 0%, var(--db-accent-green) 100%);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: transform 0.2s ease, filter 0.2s ease;
}

.db-brand__mark::after {
  content: "";
  position: absolute;
  top: 7px;
  left: 7px;
  right: 7px;
  bottom: 7px;
  background: var(--db-bg-void);
  clip-path: polygon(5px 0, calc(100% - 5px) 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

.db-brand:hover .db-brand__mark {
  transform: rotate(-4deg) scale(1.03);
  filter: brightness(1.1);
}

.db-brand__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.05;
}

.db-brand__name {
  font-family: var(--db-font-headline);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--db-text-primary);
  transition: color 0.2s ease;
}

.db-brand:hover .db-brand__name {
  color: var(--db-accent-blue);
}

.db-brand__sub {
  font-family: var(--db-font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--db-text-secondary);
  text-transform: uppercase;
  margin-top: 3px;
}

.db-switch {
  display: inline-flex;
  align-items: stretch;
  background: var(--db-bg-carbon);
  border: 1px solid rgba(102, 224, 255, 0.22);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.db-switch__btn {
  position: relative;
  padding: 6px 14px;
  font-family: var(--db-font-body);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--db-text-secondary);
  background: transparent;
  transition: background 0.25s ease, color 0.25s ease;
}

.db-switch__btn + .db-switch__btn {
  border-left: 1px solid rgba(102, 224, 255, 0.14);
}

.db-switch__btn--cn.is-active {
  background: var(--db-accent-blue);
  color: var(--db-bg-void);
}

.db-switch__btn--old.is-active {
  background: var(--db-accent-orange);
  color: #ffffff;
}

.db-switch__btn.is-active::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 2px;
  height: 2px;
  background: currentColor;
  opacity: 0.35;
}

.db-switch__btn--pulse {
  animation: db-pulse 0.4s ease;
}

@keyframes db-pulse {
  0% {
    filter: brightness(1.5);
  }
  100% {
    filter: brightness(1);
  }
}

.db-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--db-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--db-accent-green);
  text-transform: uppercase;
  white-space: nowrap;
}

.db-live__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--db-accent-green);
  animation: db-blink 1.6s ease-in-out infinite;
}

.db-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: var(--db-bg-carbon);
  border: 1px solid rgba(102, 224, 255, 0.25);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.2s ease;
}

.db-nav-toggle:hover {
  background: rgba(0, 198, 255, 0.15);
}

.db-nav-toggle__bar {
  width: 18px;
  height: 2px;
  background: var(--db-text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

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

.db-header-nav {
  border-top: 1px solid rgba(102, 224, 255, 0.12);
  background: rgba(16, 23, 40, 0.88);
}

.db-nav {
  display: flex;
  justify-content: center;
}

.db-nav + .db-nav {
  border-top: 1px dashed rgba(102, 224, 255, 0.12);
}

.db-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
}

.db-nav__item {
  display: block;
}

.db-nav--primary .db-nav__list {
  padding: 6px 0 2px;
}

.db-nav--utility .db-nav__list {
  padding: 2px 0 6px;
}

.db-nav__link {
  display: inline-block;
  position: relative;
  padding: 8px 16px;
  font-family: var(--db-font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--db-text-primary);
  transition: color 0.2s ease;
}

.db-nav__link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--db-accent-blue), var(--db-accent-green));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.db-nav__link:hover {
  color: var(--db-accent-blue);
}

.db-nav__link:hover::after,
.db-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.db-nav__link[aria-current="page"] {
  color: var(--db-accent-blue);
}

.db-nav__link--ghost {
  font-family: var(--db-font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--db-text-secondary);
  padding: 4px 14px;
}

.db-nav__link--ghost::after {
  display: none;
}

.db-nav__link--ghost:hover {
  color: var(--db-accent-green);
}

.db-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 500;
  background: linear-gradient(90deg, var(--db-accent-blue), var(--db-accent-green), var(--db-accent-orange));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ===== 页脚 ===== */

.db-site-footer {
  position: relative;
  flex: none;
  margin-top: auto;
  background: linear-gradient(180deg, var(--db-bg-panel) 0%, var(--db-bg-void) 100%);
  border-top: 1px solid rgba(102, 224, 255, 0.14);
  overflow: hidden;
}

.db-site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--db-accent-blue), var(--db-accent-green) 45%, var(--db-accent-orange));
  background-size: 200% 100%;
  animation: db-flow 6s linear infinite;
}

@keyframes db-flow {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.db-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 64px;
  padding-top: 48px;
  padding-bottom: 36px;
}

.db-footer__desc {
  margin-top: 14px;
  max-width: 440px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--db-text-secondary);
}

.db-footer__trust {
  margin-top: 14px;
  max-width: 440px;
  padding-left: 12px;
  border-left: 2px solid rgba(0, 198, 255, 0.5);
  font-size: 12px;
  line-height: 1.8;
  color: rgba(143, 163, 191, 0.72);
}

.db-footer__title {
  position: relative;
  padding-left: 14px;
  margin-bottom: 18px;
  font-family: var(--db-font-headline);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--db-text-primary);
}

.db-footer__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--db-accent-blue);
  transform: translateY(-50%) rotate(45deg);
}

.db-footer__nav-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.db-footer__nav-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--db-text-secondary);
  transition: color 0.2s ease, transform 0.2s ease;
}

.db-footer__nav-link:hover {
  color: var(--db-accent-blue);
  transform: translateX(3px);
}

.db-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 18px;
  padding-bottom: 20px;
  border-top: 1px solid rgba(102, 224, 255, 0.12);
  font-size: 13px;
  color: var(--db-text-secondary);
}

.db-footer__icp {
  font-family: var(--db-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(143, 163, 191, 0.85);
}

.db-footer__meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.db-footer__copyright {
  font-family: var(--db-font-mono);
  font-size: 12px;
  color: rgba(143, 163, 191, 0.65);
}

.db-footer .db-brand__mark {
  width: 28px;
  height: 28px;
}

.db-footer .db-brand__name {
  font-size: 22px;
}

.db-footer .db-brand__sub {
  font-size: 8px;
}

/* ===== 网格与卡片 ===== */

.db-grid {
  display: grid;
  gap: 20px;
}

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

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

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

.db-card {
  position: relative;
  display: block;
  padding: 24px;
  background: linear-gradient(160deg, rgba(16, 23, 40, 0.92), rgba(16, 23, 40, 0.5));
  border: 1px solid rgba(102, 224, 255, 0.12);
  border-radius: var(--db-radius);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.db-card:hover {
  border-color: rgba(102, 224, 255, 0.45);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px var(--db-shadow);
}

.db-card__title {
  font-family: var(--db-font-headline);
  font-size: 19px;
  font-weight: 700;
  color: var(--db-text-primary);
  margin-bottom: 8px;
}

.db-card__meta {
  font-family: var(--db-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--db-accent-blue);
}

.db-card__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--db-text-secondary);
}

/* ===== 面板与媒体 ===== */

.db-panel {
  background: linear-gradient(160deg, var(--db-bg-panel), rgba(16, 23, 40, 0.4));
  border: 1px solid rgba(102, 224, 255, 0.16);
  border-radius: var(--db-radius);
  box-shadow: 0 18px 44px var(--db-shadow);
  padding: var(--db-space-4);
}

.db-panel--bevel {
  border-radius: 0;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.db-media {
  position: relative;
  display: block;
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 15%, rgba(0, 198, 255, 0.12), transparent 45%),
    linear-gradient(145deg, var(--db-bg-carbon), var(--db-bg-panel));
}

.db-media::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.db-media[data-ratio="16:10"]::before {
  padding-top: 62.5%;
}

.db-media[data-ratio="4:3"]::before {
  padding-top: 75%;
}

.db-media[data-ratio="1:1"]::before {
  padding-top: 100%;
}

.db-media[data-ratio="3:4"]::before {
  padding-top: 133.33%;
}

.db-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(102, 224, 255, 0.06) 25%, transparent 25%) 0 0 / 12px 12px,
    linear-gradient(225deg, rgba(102, 224, 255, 0.06) 25%, transparent 25%) 0 0 / 12px 12px;
  pointer-events: none;
}

.db-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.db-carbon {
  background-color: var(--db-bg-carbon);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.035), transparent 45%),
    radial-gradient(circle at 80% 90%, rgba(0, 198, 255, 0.05), transparent 40%),
    repeating-linear-gradient(45deg, rgba(0, 0, 0, 0.2) 0, rgba(0, 0, 0, 0.2) 1px, transparent 1px, transparent 3px),
    repeating-linear-gradient(-45deg, rgba(0, 0, 0, 0.14) 0, rgba(0, 0, 0, 0.14) 1px, transparent 1px, transparent 3px);
}

.db-hero {
  position: relative;
  padding: var(--db-space-6) 0;
  overflow: hidden;
  border-bottom: 1px solid rgba(102, 224, 255, 0.1);
}

.db-hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -10%;
  width: 45%;
  height: 120%;
  background: linear-gradient(105deg, transparent 25%, rgba(0, 198, 255, 0.07) 50%, rgba(0, 230, 160, 0.04) 62%, transparent 80%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.db-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: var(--db-space-4) 0;
  color: var(--db-text-secondary);
}

.db-divider::before,
.db-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(102, 224, 255, 0.4), transparent);
}

.db-divider__shape {
  width: 44px;
  height: 10px;
  background: linear-gradient(90deg, var(--db-accent-blue), var(--db-accent-green));
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 10px 100%);
}

/* ===== 时间轴 ===== */

.db-timeline {
  position: relative;
  margin: 0;
  padding: 8px 0 8px 28px;
  list-style: none;
}

.db-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--db-accent-blue) 0%, var(--db-accent-green) 70%, transparent 100%);
}

.db-timeline__item {
  position: relative;
  padding: 0 0 22px 18px;
}

.db-timeline__item:last-child {
  padding-bottom: 0;
}

.db-timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--db-bg-void);
  border: 2px solid var(--db-accent-blue);
  clip-path: polygon(30% 0, 100% 0, 100% 70%, 70% 100%, 0 100%, 0 30%);
}

.db-timeline__time {
  font-family: var(--db-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--db-accent-blue);
}

.db-timeline__title {
  font-family: var(--db-font-headline);
  font-size: 18px;
  font-weight: 700;
  color: var(--db-text-primary);
  margin-top: 4px;
}

.db-timeline__desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--db-text-secondary);
}

/* ===== 横向滚动容器 ===== */

.db-hscroll {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 320px);
  gap: 16px;
  overflow-x: auto;
  padding: 8px 4px 16px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--db-accent-blue) rgba(143, 163, 191, 0.12);
}

.db-hscroll::-webkit-scrollbar {
  height: 6px;
}

.db-hscroll::-webkit-scrollbar-track {
  background: rgba(143, 163, 191, 0.12);
}

.db-hscroll::-webkit-scrollbar-thumb {
  background: var(--db-accent-blue);
  border-radius: 3px;
}

.db-hscroll > * {
  scroll-snap-align: start;
}

/* ===== 折叠面板 ===== */

.db-accordion {
  border: 1px solid rgba(102, 224, 255, 0.18);
  border-left: 2px solid var(--db-accent-blue);
  background: linear-gradient(160deg, var(--db-bg-panel), var(--db-bg-void));
  margin-bottom: 12px;
}

.db-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  font-family: var(--db-font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  text-align: left;
  color: var(--db-text-primary);
  cursor: pointer;
  transition: background 0.2s ease;
}

.db-accordion__trigger:hover {
  background: rgba(0, 198, 255, 0.06);
}

.db-accordion__icon {
  flex: none;
  position: relative;
  width: 18px;
  height: 18px;
}

.db-accordion__icon::before,
.db-accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--db-accent-blue);
  transition: transform 0.3s ease;
}

.db-accordion__icon::before {
  top: 8px;
  left: 1px;
  right: 1px;
  height: 2px;
  border-radius: 1px;
}

.db-accordion__icon::after {
  left: 8px;
  top: 1px;
  bottom: 1px;
  width: 2px;
  border-radius: 1px;
}

.db-accordion__trigger[aria-expanded="true"] .db-accordion__icon::after {
  transform: scaleY(0);
}

.db-accordion__panel {
  padding: 0 20px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--db-text-secondary);
}

.db-accordion__panel[hidden] {
  display: none;
}

/* ===== 标签与数据字 ===== */

.db-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-family: var(--db-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--db-accent-blue);
  background: rgba(0, 198, 255, 0.1);
  border: 1px solid rgba(0, 198, 255, 0.3);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.db-tag--green {
  color: var(--db-accent-green);
  background: rgba(0, 230, 160, 0.1);
  border-color: rgba(0, 230, 160, 0.3);
}

.db-tag--orange {
  color: var(--db-accent-orange);
  background: rgba(255, 61, 46, 0.12);
  border-color: rgba(255, 61, 46, 0.35);
}

.db-data {
  font-family: var(--db-font-mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--db-accent-green);
}

.db-mono {
  font-family: var(--db-font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
}

/* ===== 多屏设备剪影 ===== */

.db-devices {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 20px 0;
}

.db-screen {
  position: relative;
  flex: none;
  background: linear-gradient(160deg, #141D30, #0B1220);
  border: 1px solid rgba(102, 224, 255, 0.3);
  border-radius: 8px;
  box-shadow: 0 24px 48px var(--db-shadow);
  overflow: hidden;
}

.db-screen::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(0, 198, 255, 0.1) 25%, transparent 25%) 0 0 / 10px 10px,
    linear-gradient(225deg, rgba(0, 230, 160, 0.08) 25%, transparent 25%) 0 0 / 10px 10px;
}

.db-screen--phone {
  width: 88px;
  height: 176px;
  z-index: 3;
}

.db-screen--tablet {
  width: 152px;
  height: 200px;
  margin-left: -14px;
  z-index: 2;
}

.db-screen--desktop {
  width: 248px;
  height: 150px;
  margin-left: -20px;
  z-index: 1;
  border-radius: 8px;
}

/* ===== 响应式 ===== */

@media (max-width: 900px) {
  .db-masthead__grid {
    padding: 12px 0;
  }

  .db-live {
    display: none;
  }

  .db-nav-toggle {
    display: flex;
  }

  .db-header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--db-bg-panel);
    border-top: 1px solid rgba(102, 224, 255, 0.18);
    border-bottom: 1px solid rgba(102, 224, 255, 0.18);
    box-shadow: 0 24px 48px var(--db-shadow);
    z-index: 120;
  }

  .db-header-nav[data-open="true"] {
    display: block;
    animation: db-nav-in 0.25s ease-out;
  }

  .db-nav__list {
    flex-direction: column;
    align-items: center;
  }

  .db-nav--primary .db-nav__list {
    padding: 10px 0;
  }

  .db-nav--utility .db-nav__list {
    padding: 10px 20px;
    border-top: 1px dashed rgba(102, 224, 255, 0.12);
  }

  .db-nav__link {
    font-size: 16px;
    padding: 10px 20px;
    text-align: center;
  }

  .db-nav__link::after {
    left: 50%;
    right: auto;
    width: 24px;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
  }

  .db-nav__link:hover::after,
  .db-nav__link[aria-current="page"]::after {
    transform: translateX(-50%) scaleX(1);
  }

  .db-nav__link--ghost {
    font-size: 14px;
    padding: 6px 16px;
  }

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

@keyframes db-nav-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 700px) {
  .db-footer__top {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 36px;
  }

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

  .db-footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .db-screen--desktop {
    display: none;
  }

  .db-screen--tablet {
    width: 140px;
    height: 190px;
  }

  .db-screen--phone {
    width: 80px;
    height: 162px;
  }
}

@media (max-width: 600px) {
  .db-grid--2,
  .db-grid--3,
  .db-grid--4 {
    grid-template-columns: 1fr;
  }

  .db-masthead__grid {
    gap: 6px;
  }

  .db-switch__btn {
    padding: 5px 10px;
    font-size: 12px;
  }

  .db-brand__mark {
    width: 26px;
    height: 26px;
  }

  .db-brand__name {
    font-size: 20px;
  }

  .db-brand__sub {
    font-size: 8px;
    letter-spacing: 0.2em;
  }

  .db-announce__text {
    font-size: 12px;
  }

  .db-container {
    width: min(100% - 24px, var(--db-container-w));
  }
}