/* ==========================================================================
   必一体育 · BSPORTS 共享样式 /assets/site.css
   设计概念：实时赛场数据终端
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --color-primary: #0B1B3B;
  --color-primary-mid: #122A55;
  --color-primary-light: #1B3A6B;
  --color-accent: #39FF88;
  --color-accent-deep: #0E9F6E;
  --color-accent-warm: #FF6B35;
  --color-accent-warm-deep: #D9541F;
  --color-bg-light: #EDF2F7;
  --color-text: #1A202C;
  --color-text-secondary: #4A5568;
  --color-line: #C6F6D5;
  --color-highlight: #C8FF00;
  --font-heading: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --header-space: 96px;
  --container: 1280px;
  --radius: 14px;
  --radius-sm: 8px;
  --transition-fast: 0.18s ease;
  --transition-base: 0.28s ease;
  --shadow-card: 0 2px 10px rgba(11, 27, 59, 0.06);
  --shadow-lift: 0 14px 34px rgba(11, 27, 59, 0.14);
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  padding-top: var(--header-space);
  background: var(--color-bg-light);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--color-primary);
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-primary);
  text-underline-offset: 3px;
}

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

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 32px 0;
}

::selection {
  background: var(--color-accent);
  color: var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 通用工具 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container--narrow {
  max-width: 960px;
}

.site-main {
  min-height: 65vh;
}

#main-content,
[id] {
  scroll-margin-top: calc(var(--header-space) + 12px);
}

#main-content {
  outline: none;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -72px;
  left: 20px;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 14px 14px;
  box-shadow: 0 8px 28px rgba(11, 27, 59, 0.4);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ---------- 悬浮胶囊头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 16px 24px 0;
  pointer-events: none;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(57, 255, 136, 0.08);
  overflow: hidden;
  pointer-events: none;
}

.site-header__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-highlight) 100%);
  box-shadow: 0 0 10px rgba(57, 255, 136, 0.55);
  transition: width 0.08s linear;
}

.site-header__inner {
  pointer-events: auto;
  width: 100%;
  max-width: var(--container);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 8px 12px 8px 18px;
  border-radius: 200px;
  background: rgba(11, 27, 59, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(57, 255, 136, 0.18);
  box-shadow: 0 6px 28px rgba(5, 12, 28, 0.45);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header[data-scrolled] .site-header__inner {
  background: rgba(11, 27, 59, 0.96);
  box-shadow: 0 10px 36px rgba(5, 12, 28, 0.6), 0 0 0 1px rgba(57, 255, 136, 0.08);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand__logo {
  position: relative;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent) 52%, var(--color-primary-light) 52%, var(--color-primary) 100%);
  box-shadow: 0 0 18px rgba(57, 255, 136, 0.32);
  transition: box-shadow var(--transition-fast);
}

.brand:hover .brand__logo {
  box-shadow: 0 0 26px rgba(57, 255, 136, 0.48);
}

.brand__logo-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 17px;
  height: 17px;
  border: 2px solid #F7FAFC;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 5px rgba(5, 12, 28, 0.35);
}

.brand__logo-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-warm);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 7px rgba(255, 107, 53, 0.8);
}

.brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: #F7FAFC;
}

.brand__meta {
  margin-top: 3px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  white-space: nowrap;
}

/* 站点导航 */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list__item {
  margin: 0;
}

.nav-list__link {
  display: block;
  padding: 9px 14px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: rgba(237, 242, 247, 0.82);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-list__link:hover {
  color: var(--color-accent);
  background: rgba(57, 255, 136, 0.1);
}

.nav-list__link[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-accent);
  font-weight: 600;
  box-shadow: 0 0 14px rgba(57, 255, 136, 0.35);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border: none;
  border-radius: 50%;
  background: rgba(57, 255, 136, 0.12);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(57, 255, 136, 0.22);
}

.nav-toggle__line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

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

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

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

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 80px;
  padding: 72px 0 0;
  background-color: var(--color-primary);
  background-image:
    linear-gradient(rgba(57, 255, 136, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  color: rgba(237, 242, 247, 0.72);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-deep) 35%, var(--color-primary-light) 70%, var(--color-accent-warm));
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.site-footer__tagline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid rgba(57, 255, 136, 0.25);
  background: rgba(57, 255, 136, 0.08);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.site-footer__desc {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(237, 242, 247, 0.56);
}

.site-footer__col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.site-footer__heading {
  margin: 0;
  padding-bottom: 10px;
  position: relative;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: #F7FAFC;
}

.site-footer__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.site-footer__list-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  line-height: 1.55;
}

.site-footer__list-label {
  flex-shrink: 0;
  min-width: 2.4em;
  font-size: 12px;
  color: rgba(237, 242, 247, 0.45);
}

.site-footer__text {
  color: rgba(237, 242, 247, 0.75);
  overflow-wrap: anywhere;
}

.site-footer__link {
  color: rgba(237, 242, 247, 0.75);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer__bottom {
  border-top: 1px solid rgba(57, 255, 136, 0.12);
  padding: 20px 24px;
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--container);
  margin: 0 auto;
  font-size: 13px;
  color: rgba(237, 242, 247, 0.5);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

.site-footer__top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid rgba(57, 255, 136, 0.28);
  background: transparent;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.site-footer__top::before {
  content: "↑";
  font-size: 14px;
  line-height: 1;
}

.site-footer__top:hover {
  background: rgba(57, 255, 136, 0.12);
  border-color: var(--color-accent);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: 100px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

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

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

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
}

.btn--primary:hover {
  box-shadow: 0 0 24px rgba(57, 255, 136, 0.4);
}

.btn--outline {
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
  background: transparent;
}

.btn--outline:hover {
  background: rgba(57, 255, 136, 0.1);
  box-shadow: 0 0 16px rgba(57, 255, 136, 0.25);
}

.btn--dark {
  background: var(--color-primary);
  color: var(--color-accent);
}

.btn--dark:hover {
  background: var(--color-primary-light);
  box-shadow: 0 0 18px rgba(57, 255, 136, 0.3);
}

.btn--warm {
  background: var(--color-accent-warm);
  color: #FFFFFF;
}

.btn--warm:hover {
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.4);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: rgba(57, 255, 136, 0.35);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  background: rgba(57, 255, 136, 0.08);
}

/* ---------- 标签 ---------- */
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: rgba(57, 255, 136, 0.12);
  color: var(--color-accent-deep);
  border: 1px solid rgba(57, 255, 136, 0.3);
  white-space: nowrap;
}

.tag-badge--warm {
  background: rgba(255, 107, 53, 0.12);
  color: var(--color-accent-warm-deep);
  border-color: rgba(255, 107, 53, 0.3);
}

.tag-badge--light {
  background: #FFFFFF;
  color: var(--color-primary);
  border-color: var(--color-line);
  box-shadow: 0 2px 8px rgba(11, 27, 59, 0.06);
}

.section-panel--dark .tag-badge {
  background: rgba(57, 255, 136, 0.15);
  color: var(--color-accent);
  border-color: rgba(57, 255, 136, 0.3);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(74, 85, 104, 0.4);
  margin: 0 6px;
}

.breadcrumb__link {
  color: var(--color-accent-deep);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumb__link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

.breadcrumb--light {
  color: rgba(237, 242, 247, 0.7);
}

.breadcrumb--light .breadcrumb__item + .breadcrumb__item::before {
  color: rgba(237, 242, 247, 0.4);
}

.breadcrumb--light .breadcrumb__link {
  color: var(--color-accent);
}

.breadcrumb--light .breadcrumb__link:hover {
  color: #FFFFFF;
}

.breadcrumb--light .breadcrumb__item[aria-current="page"] {
  color: rgba(237, 242, 247, 0.9);
}

/* ---------- 章节面板 ---------- */
.section-panel {
  position: relative;
  padding: 80px 0;
}

.section-panel--dark {
  background-color: var(--color-primary);
  background-image:
    linear-gradient(rgba(57, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  color: rgba(237, 242, 247, 0.85);
}

.section-panel--dark h1,
.section-panel--dark h2,
.section-panel--dark h3,
.section-panel--dark h4,
.section-panel--dark h5,
.section-panel--dark h6 {
  color: #F7FAFC;
}

.section-panel--dark p {
  color: rgba(237, 242, 247, 0.78);
}

.section-panel--light {
  background: var(--color-bg-light);
}

.section-panel--ink {
  background: #FFFFFF;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section-panel--slash {
  position: relative;
  overflow: hidden;
}

.section-panel--slash::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 42px;
  z-index: 1;
  background: var(--slash-color, var(--color-bg-light));
  -webkit-clip-path: polygon(100% 100%, 0 0, 0 100%);
  clip-path: polygon(100% 100%, 0 0, 0 100%);
}

/* ---------- 章节标题 ---------- */
.section-heading {
  margin-bottom: 36px;
}

.section-heading__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
}

.section-heading__kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  flex-shrink: 0;
}

.section-heading__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.15;
  color: var(--color-primary);
}

.section-heading__desc {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.section-panel--dark .section-heading__kicker {
  color: var(--color-accent);
}

.section-panel--dark .section-heading__title {
  color: #F7FAFC;
}

.section-panel--dark .section-heading__desc {
  color: rgba(237, 242, 247, 0.72);
}

/* ---------- 小标签 ---------- */
.eyebrow-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.eyebrow-label::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(57, 255, 136, 0.6);
}

.section-panel--dark .eyebrow-label {
  color: rgba(237, 242, 247, 0.65);
}

/* ---------- 数据网格 ---------- */
.data-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.data-grid__item {
  min-width: 0;
}

.data-grid__item--span-3 { grid-column: span 3; }
.data-grid__item--span-4 { grid-column: span 4; }
.data-grid__item--span-5 { grid-column: span 5; }
.data-grid__item--span-6 { grid-column: span 6; }
.data-grid__item--span-7 { grid-column: span 7; }
.data-grid__item--span-8 { grid-column: span 8; }
.data-grid__item--span-12 { grid-column: span 12; }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: #FFFFFF;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--color-accent);
}

.card--dark {
  background: linear-gradient(160deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  border-color: rgba(57, 255, 136, 0.15);
  box-shadow: 0 4px 20px rgba(5, 12, 28, 0.35);
}

.card--dark:hover {
  border-color: rgba(57, 255, 136, 0.45);
  box-shadow: 0 12px 32px rgba(5, 12, 28, 0.5);
}

.card--stat {
  overflow: hidden;
}

.card--stat::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 52px solid rgba(57, 255, 136, 0.1);
  border-left: 52px solid transparent;
}

.card--stat .card__title {
  font-size: 14px;
  color: var(--color-text-secondary);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin: 0;
}

.card__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.3;
  color: var(--color-primary);
}

.card__body {
  flex: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.card__footer {
  margin-top: auto;
  padding-top: 8px;
}

.card--dark .card__title {
  color: #F7FAFC;
}

.card--dark .card__body {
  color: rgba(237, 242, 247, 0.7);
}

/* ---------- 数据数字 ---------- */
.data-num {
  display: block;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 2.4em;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-accent-deep);
}

.data-num--glow {
  color: var(--color-accent);
  text-shadow: 0 0 18px rgba(57, 255, 136, 0.45);
}

.card--dark .data-num,
.section-panel--dark .data-num {
  color: var(--color-accent);
}

.data-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.card--dark .data-label,
.section-panel--dark .data-label {
  color: rgba(237, 242, 247, 0.55);
}

/* ---------- 统计块 ---------- */
.stat-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 22px 20px;
  border-radius: var(--radius);
  background: var(--color-bg-light);
  border: 1px solid var(--color-line);
}

.section-panel--dark .stat-block,
.card--dark .stat-block {
  background: rgba(57, 255, 136, 0.06);
  border-color: rgba(57, 255, 136, 0.18);
}

/* ---------- 图片容器 ---------- */
.img-box {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(57, 255, 136, 0.15);
  background-color: var(--color-primary);
  background-image:
    linear-gradient(rgba(57, 255, 136, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.img-box::before {
  content: attr(data-label);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(57, 255, 136, 0.55);
}

.img-box:not([data-label])::before {
  content: "IMG";
}

.img-box img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-box--16-9 {
  aspect-ratio: 16 / 9;
}

.img-box--4-3 {
  aspect-ratio: 4 / 3;
}

.img-box--full {
  aspect-ratio: auto;
  min-height: 160px;
}

/* ---------- 旁注 ---------- */
.side-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 20px;
  padding: 14px 18px;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(57, 255, 136, 0.08);
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.side-note::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 6px rgba(57, 255, 136, 0.5);
}

/* ---------- 特性列表 ---------- */
.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
  background: #FFFFFF;
  font-size: 14px;
  line-height: 1.55;
}

.feature-list__item::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--color-accent-deep);
  box-shadow: 0 0 0 3px rgba(57, 255, 136, 0.2);
}

.feature-list--plain .feature-list__item {
  background: transparent;
  border: 0;
  padding: 6px 0;
  border-radius: 0;
}

/* ---------- 页头 ---------- */
.page-header {
  position: relative;
  overflow: hidden;
  padding: 64px 0 56px;
  border-radius: 0 0 24px 24px;
  background-color: var(--color-primary);
  background-image:
    linear-gradient(rgba(57, 255, 136, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.045) 1px, transparent 1px),
    linear-gradient(140deg, var(--color-primary) 0%, var(--color-primary-mid) 60%, var(--color-primary-light) 100%);
  background-size: 40px 40px, 40px 40px, auto;
}

.page-header::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 320px;
  height: 320px;
  border-radius: 36px;
  background: rgba(57, 255, 136, 0.07);
  transform: rotate(18deg);
}

.page-header h1 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  color: #F7FAFC;
}

.page-header__desc {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(237, 242, 247, 0.72);
}

/* ---------- 装饰线 ---------- */
.diagonal-rule {
  display: block;
  height: 36px;
  margin: 24px 0;
  border: 0;
  background: linear-gradient(112deg, transparent 16%, var(--color-accent) 16%, var(--color-accent) 18%, transparent 18%, transparent 72%, var(--color-accent-warm) 72%, var(--color-accent-warm) 74%, transparent 74%);
  opacity: 0.6;
}

/* ---------- 滚动显现 ---------- */
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .data-grid__item--span-3,
  .data-grid__item--span-4,
  .data-grid__item--span-5,
  .data-grid__item--span-6,
  .data-grid__item--span-7,
  .data-grid__item--span-8 {
    grid-column: span 6;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header {
    padding: 12px 16px 0;
  }

  .site-header__inner {
    flex-wrap: wrap;
    border-radius: 20px;
    padding: 8px 8px 8px 14px;
  }

  .site-nav {
    flex-basis: 100%;
    display: none;
    margin: 4px 2px 0;
    padding: 10px 0 2px;
    border-top: 1px solid rgba(57, 255, 136, 0.15);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list__link {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
  }

  .nav-list__link[aria-current="page"] {
    box-shadow: none;
  }

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

  .section-panel {
    padding: 56px 0;
  }
}

@media (max-width: 640px) {
  .brand__meta {
    display: none;
  }

  .brand__logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .data-grid__item--span-3,
  .data-grid__item--span-4,
  .data-grid__item--span-5,
  .data-grid__item--span-6,
  .data-grid__item--span-7,
  .data-grid__item--span-8,
  .data-grid__item--span-12 {
    grid-column: span 12;
  }

  .page-header {
    padding: 48px 0 40px;
  }

  .section-panel {
    padding: 44px 0;
  }

  .site-footer {
    margin-top: 56px;
    padding-top: 56px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }

  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}

/* ---------- 减弱动态 ---------- */
@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;
    scroll-behavior: auto !important;
  }
}