/* ==========================================================
   顺发体育官方（中国）入口页 · 全站共享样式 /assets/site.css
   设计语言：冰雪竞技 · 对角线切割 · 数据叙事
   ========================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --color-ice: #E4F2F7;
  --color-snow: #FFFFFF;
  --color-deep: #0F2B3D;
  --color-accent: #FF5A2A;
  --color-glacier: #B6C9D3;
  --color-rock: #6B7A84;
  --color-moss: #3E6B5E;
  --color-clay: #C96A4B;
  --color-mist: #F0F5F8;

  --font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;

  --container-max: 1240px;
  --header-h: 76px;
  --cut-size: 16px;
  --shadow-card: 0 2px 6px rgba(15, 43, 61, 0.08);
  --shadow-raised: 0 14px 28px rgba(15, 43, 61, 0.14);
}

/* ---------- Reset / 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--color-deep);
  background: linear-gradient(180deg, var(--color-mist) 0%, var(--color-ice) 300px, var(--color-ice) 100%);
  min-width: 320px;
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style-position: inside;
}

a {
  color: var(--color-deep);
  text-underline-offset: 4px;
  text-decoration-color: var(--color-glacier);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-deep);
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 58px;
  line-height: 1.05;
}

h2 {
  font-size: 40px;
}

h3 {
  font-size: 28px;
}

h4 {
  font-size: 20px;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

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

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

/* ---------- 工具类 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.main-content {
  min-height: 60vh;
  padding-top: 1.75rem;
  padding-bottom: 3rem;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

/* ---------- 跳转链接与滚动进度 ---------- */
.skip-link {
  position: fixed;
  top: 6px;
  left: 6px;
  z-index: 400;
  display: block;
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-snow);
  font-weight: 700;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-150%);
  transition: transform 120ms ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 350;
  pointer-events: none;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(240, 245, 248, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 120px, var(--color-glacier) 120px, var(--color-glacier) 100%);
  pointer-events: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--color-deep);
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--color-deep);
  color: var(--color-snow);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 120ms ease;
}

.brand:hover .brand__mark {
  background: var(--color-accent);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* ---------- 导航 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: var(--color-deep);
  border: none;
  border-radius: 0;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: background 120ms ease;
}

.nav-toggle:hover {
  background: var(--color-accent);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-snow);
  transition: transform 120ms ease, opacity 120ms ease;
}

.nav-toggle.is-active .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  display: inline-block;
  position: relative;
  padding: 0.5rem 0.75rem;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-deep);
  text-decoration: none;
  border-radius: 2px;
  transition: color 120ms ease, background 120ms ease;
}

.nav__link:hover {
  color: var(--color-accent);
  background: rgba(255, 90, 42, 0.08);
}

.nav__link[aria-current="page"] {
  font-weight: 700;
  color: var(--color-deep);
}

.nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.125rem;
  height: 2px;
  background: var(--color-accent);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--color-deep);
  color: rgba(255, 255, 255, 0.82);
  padding: 3rem 0 2rem;
  margin-top: 3.5rem;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 160px, var(--color-glacier) 160px, transparent 100%);
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-bottom: 2.25rem;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--color-snow);
  margin-bottom: 0.375rem;
}

.footer-brand__tagline {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-glacier);
  margin-bottom: 1rem;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-glacier);
  max-width: 52ch;
}

.footer-nav__title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-snow);
  margin-bottom: 0.75rem;
}

.footer-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.375rem 1rem;
}

.footer-nav__link {
  display: inline-block;
  padding: 0.125rem 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  transition: color 120ms ease;
}

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

.footer-contact__line {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0.75rem;
}

.footer-contact__line strong {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-snow);
  margin-bottom: 0.125rem;
}

.footer-address {
  font-style: normal;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-glacier);
  margin-top: 0.75rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 1.5rem;
  border-top: 1px solid rgba(182, 201, 211, 0.2);
  padding-top: 1.25rem;
  font-size: 13px;
  color: var(--color-glacier);
}

.footer-copy {
  margin: 0;
}

.footer-version {
  margin-left: 0.625rem;
  padding: 0.125rem 0.375rem;
  border: 1px solid rgba(182, 201, 211, 0.28);
  font-size: 12px;
}

.footer-icp {
  margin-left: auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-deep);
  background: var(--color-snow);
  border: 2px solid var(--color-deep);
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  filter: drop-shadow(0 2px 2px rgba(15, 43, 61, 0.06));
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease, transform 120ms ease, filter 120ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  filter: drop-shadow(0 6px 14px rgba(15, 43, 61, 0.16));
}

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

.btn--primary:hover {
  background: #E64E1F;
  border-color: #E64E1F;
}

.btn--dark {
  background: var(--color-deep);
  border-color: var(--color-deep);
  color: var(--color-snow);
}

.btn--dark:hover {
  background: var(--color-rock);
  border-color: var(--color-rock);
}

.btn--ghost {
  background: transparent;
  border-color: currentColor;
  color: var(--color-deep);
}

.btn--ghost:hover {
  background: rgba(255, 90, 42, 0.08);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  font-size: 14px;
  color: var(--color-rock);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin: 0 0.5rem;
  color: var(--color-glacier);
  font-weight: 700;
}

.breadcrumb__link {
  padding: 0.125rem 0;
  color: var(--color-deep);
  text-decoration: none;
}

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

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

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

.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));
}

/* ---------- 章节 ---------- */
.section {
  padding: 2.75rem 0;
}

.section__head {
  display: flex;
  align-items: flex-end;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.section__index {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 100;
  font-size: 58px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-glacier);
  white-space: nowrap;
}

.section__title {
  font-size: 28px;
  margin: 0 0 0.25rem;
}

.section__desc {
  margin: 0;
  color: var(--color-rock);
  max-width: 56ch;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-snow);
  padding: 1.5rem;
  clip-path: polygon(0 0, calc(100% - var(--cut-size)) 0, 100% var(--cut-size), 100% 100%, 0 100%);
  filter: drop-shadow(0 2px 6px rgba(15, 43, 61, 0.08));
  transition: transform 120ms ease, filter 120ms ease;
}

.card:hover {
  transform: translateY(-4px);
  filter: drop-shadow(0 14px 28px rgba(15, 43, 61, 0.14));
}

.card__title {
  font-size: 20px;
  margin-bottom: 0.5rem;
}

.card__body {
  font-size: 14px;
  color: var(--color-rock);
  margin-bottom: 1rem;
}

/* ---------- 数据强调 ---------- */
.data-group {
  display: grid;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.data-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-rock);
}

.data-value {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-deep);
}

.data-value--accent {
  color: var(--color-accent);
}

.data-value--small {
  font-size: 20px;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-deep);
  background: var(--color-ice);
  border: 1px solid var(--color-glacier);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.tag--accent {
  color: var(--color-snow);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.tag--moss {
  color: var(--color-snow);
  background: var(--color-moss);
  border-color: var(--color-moss);
}

.tag--clay {
  color: var(--color-snow);
  background: var(--color-clay);
  border-color: var(--color-clay);
}

/* ---------- 状态点 ---------- */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-glacier);
  margin-right: 0.5rem;
  vertical-align: middle;
}

.status-dot--active {
  background: var(--color-moss);
  animation: dot-pulse 2.2s ease-in-out infinite;
}

.status-dot--warn {
  background: var(--color-clay);
}

@keyframes dot-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(62, 107, 94, 0.4);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(62, 107, 94, 0);
  }
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline__item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 1.75rem;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.375rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-snow);
  border: 3px solid var(--color-accent);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

.timeline__item::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1.5rem;
  bottom: 0;
  width: 2px;
  background: var(--color-glacier);
}

.timeline__item:last-child::after {
  display: none;
}

.timeline__meta {
  display: block;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-rock);
  margin-bottom: 0.125rem;
}

.timeline__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline__body {
  margin: 0;
  font-size: 14px;
  color: var(--color-rock);
}

/* ---------- 折叠面板 ---------- */
.panel {
  background: var(--color-snow);
  border: 1px solid rgba(182, 201, 211, 0.7);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  padding: 0 1.5rem;
  margin-bottom: 1rem;
}

.panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-deep);
  cursor: pointer;
  list-style: none;
}

.panel summary::-webkit-details-marker {
  display: none;
}

.panel summary::after {
  content: '+';
  flex-shrink: 0;
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
  color: var(--color-accent);
  transition: transform 120ms ease;
}

.panel[open] summary::after {
  transform: rotate(45deg);
}

.panel__body {
  padding-bottom: 1.25rem;
  font-size: 14px;
  color: var(--color-rock);
}

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-snow);
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(182, 201, 211, 0.55);
}

.data-table th {
  background: var(--color-ice);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-deep);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover {
  background: rgba(228, 242, 247, 0.55);
}

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-deep) 0%, var(--color-glacier) 65%, var(--color-mist) 100%);
}

.media--16-9 {
  aspect-ratio: 16 / 9;
}

.media--4-3 {
  aspect-ratio: 4 / 3;
}

.media--3-4 {
  aspect-ratio: 3 / 4;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.06) saturate(0.92);
}

/* ---------- 构图装饰 ---------- */
.cut {
  clip-path: polygon(0 0, calc(100% - var(--cut-size)) 0, 100% var(--cut-size), 100% 100%, 0 100%);
}

.tilt-band {
  display: block;
  height: 4px;
  margin: 2rem 0;
  background: linear-gradient(100deg, var(--color-accent) 0%, var(--color-accent) 160px, var(--color-glacier) 160px, transparent 100%);
  transform: skewX(-2deg);
}

.crack-bg {
  background-color: var(--color-ice);
  background-image:
    linear-gradient(32deg, rgba(182, 201, 211, 0.22) 1px, transparent 1px),
    linear-gradient(-32deg, rgba(182, 201, 211, 0.16) 1px, transparent 1px);
  background-size: 28px 48px;
}

.offset-left {
  transform: translateX(-6%);
}

.offset-right {
  transform: translateX(6%);
}

/* ---------- 滚动显现 ---------- */
html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 200ms ease, transform 200ms ease;
}

html[data-reveal-ready] [data-reveal="shown"] {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式：平板 / 手机 ---------- */
@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

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

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 119;
    background: var(--color-snow);
    box-shadow: 0 18px 30px rgba(15, 43, 61, 0.14);
    padding: 0.5rem 1rem 1rem;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

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

  .nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__item {
    border-bottom: 1px solid rgba(182, 201, 211, 0.5);
  }

  .nav__item:last-child {
    border-bottom: 0;
  }

  .nav__link {
    display: block;
    padding: 0.875rem 0.5rem;
    font-size: 16px;
    border-radius: 0;
  }

  .nav__link[aria-current="page"]::after {
    display: none;
  }

  .nav__link[aria-current="page"] {
    color: var(--color-accent);
    font-weight: 700;
    border-left: 3px solid var(--color-accent);
    padding-left: 0.625rem;
  }

  .offset-left,
  .offset-right {
    transform: none;
  }
}

@media (max-width: 768px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 28px;
  }

  .section__index {
    font-size: 40px;
  }
}

@media (max-width: 640px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .grid,
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .brand__name {
    font-size: 17px;
  }

  .section {
    padding: 2rem 0;
  }

  .section__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .footer-nav__list {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .footer-icp {
    margin-left: 0;
  }

  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 380px) {
  .brand {
    gap: 0.5rem;
  }

  .brand__mark {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }

  .brand__name {
    font-size: 15px;
  }
}

/* ---------- 减少动态偏好 ---------- */
@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;
  }

  html[data-reveal-ready] [data-reveal],
  html[data-reveal-ready] [data-reveal="shown"] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover,
  .card:hover {
    transform: none;
  }
}