/* ==========================================================================
   /assets/site.css — 王电子看台 共享外壳样式
   色彩体系：海岛青蓝 / 深海墨蓝 / 珊瑚橙 / 沙白 / 浅浪青 + 三色状态
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5,
p, ul, ol, li, figure, figcaption, blockquote, dl, dd, dt {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

img { height: auto; }

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

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

/* ---------- 变量 ---------- */
:root {
  --c-sea: #0E8FA6;
  --c-sea-deep: #0A7A8E;
  --c-deep: #0A2733;
  --c-coral: #FF6A4D;
  --c-coral-deep: #EF5334;
  --c-sand: #F8F4EA;
  --c-paper: #FFFDF7;
  --c-wave: #D9EFF2;
  --c-mint: #6FC3A4;
  --c-amber: #E4B44C;
  --c-brick: #C1543F;
  --c-slate: #5B7889;

  --c-line: rgba(10, 39, 51, 0.14);
  --c-line-strong: rgba(10, 39, 51, 0.32);
  --c-line-sea: rgba(14, 143, 166, 0.28);

  --font-head: 'Noto Sans SC', 'Source Han Sans SC', 'HarmonyOS Sans', 'PingFang SC', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-index: ui-monospace, 'SFMono-Regular', 'Roboto Mono', Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 48px);
  --space: clamp(96px, 9vw, 140px);
  --radius-pill: 999px;
  --radius-soft: 20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 基础排版 ---------- */
body {
  background-color: var(--c-sand);
  color: var(--c-deep);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

#main-content { scroll-margin-top: 24px; }

::selection {
  background: rgba(255, 106, 77, 0.22);
  color: var(--c-deep);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: 0.01em;
}

/* ---------- 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 2px;
  border-radius: 2px;
}

.on-dark :focus-visible,
.has-dark-bg :focus-visible {
  outline-color: var(--c-sand);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 200;
  transform: translate(-50%, -160%);
  padding: 12px 26px;
  background: var(--c-deep);
  color: var(--c-sand);
  font-size: 14px;
  letter-spacing: 0.1em;
  border-radius: 0 0 12px 12px;
  transition: transform 0.18s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 150;
  background: transparent;
  pointer-events: none;
}

.scroll-progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--c-coral);
}

/* ---------- 页头：居中刊头 ---------- */
.site-header {
  position: relative;
  background: var(--c-sand);
  border-bottom: 1px solid var(--c-line);
}

.site-header__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 58px) var(--gutter) clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.masthead__kicker {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: var(--c-slate);
}

.masthead__title {
  margin-top: 12px;
  font-family: var(--font-head);
  font-weight: 250;
  font-size: clamp(38px, 7.4vw, 92px);
  line-height: 1.02;
  letter-spacing: 0.015em;
  color: var(--c-deep);
}

.masthead__title a {
  color: inherit;
  transition: color 0.18s var(--ease);
}

.masthead__title a:hover { color: var(--c-sea); }

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-top: 24px;
  padding: 9px 20px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--c-deep);
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--c-coral);
  color: var(--c-coral);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle__bars i {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
}

.nav-toggle__text { line-height: 1; }

/* ---------- 栏目导航 ---------- */
.site-nav {
  width: 100%;
  margin-top: clamp(20px, 3vw, 34px);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(14px, 2.6vw, 40px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 4px 2px 10px;
  font-size: 15px;
  letter-spacing: 0.07em;
  color: var(--c-deep);
  transition: color 0.16s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--c-coral);
  transform: translateX(-50%);
  transition: width 0.18s var(--ease);
}

.site-nav__link:hover { color: var(--c-sea); }
.site-nav__link:hover::after { width: 100%; }

.site-nav__link[aria-current="page"] {
  color: var(--c-coral);
  font-weight: 600;
}

.site-nav__link[aria-current="page"]::after { width: 100%; }

/* ---------- 更新记录条带 ---------- */
.quick-band {
  margin-top: clamp(24px, 3.6vw, 40px);
  background: var(--c-wave);
  border-top: 1px solid var(--c-line-sea);
  border-bottom: 1px solid var(--c-line);
}

.quick-band__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: stretch;
  gap: clamp(14px, 2vw, 26px);
}

.quick-band__label {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 12px 0;
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-sea);
  white-space: nowrap;
}

.band-track {
  flex: 1 1 auto;
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.band-item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  border-right: 1px dashed var(--c-line-sea);
}

.band-item:first-child { border-left: 1px dashed var(--c-line-sea); }

.band-item__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  font-size: 14px;
  color: var(--c-deep);
  white-space: nowrap;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease);
}

.band-item__link:hover,
.band-item__link:focus-visible {
  background: rgba(255, 253, 247, 0.75);
  color: var(--c-sea);
}

.band-item__index {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-slate);
}

.band-item__label {
  font-size: 14px;
  letter-spacing: 0.04em;
}

.band-item__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-coral);
  opacity: 0;
  transition: opacity 0.16s var(--ease);
}

.band-item__link[aria-current="page"] {
  color: var(--c-coral);
  font-weight: 600;
}

.band-item__link[aria-current="page"] .band-item__index { color: var(--c-coral); }
.band-item__link[aria-current="page"] .band-item__dot { opacity: 1; }

/* ---------- 容器与区块 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.wrap--prose { max-width: 760px; }

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

.section--tight { padding-block: clamp(56px, 6vw, 84px); }
.section--wave { background: var(--c-wave); }
.section--paper { background: var(--c-paper); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-sea);
  font-weight: 700;
}

.eyebrow--coral { color: var(--c-coral); }
.eyebrow--slate { color: var(--c-slate); }

/* ---------- 正文块 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-deep);
}

.prose > * + * { margin-top: 1.15em; }

.prose h2 {
  font-family: var(--font-head);
  font-size: clamp(22px, 2.4vw, 24px);
  font-weight: 500;
  line-height: 1.45;
  margin-top: 2.2em;
}

.prose h2:first-child { margin-top: 0; }

.prose h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
  margin-top: 1.8em;
}

.prose p { max-width: 68ch; }

.prose strong { font-weight: 700; }

.prose ul li,
.prose ol li {
  position: relative;
  padding-left: 20px;
  margin-top: 0.55em;
  max-width: 68ch;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.75em;
  width: 7px;
  height: 1.5px;
  background: var(--c-sea);
}

.prose ol { counter-reset: prose-ol; }

.prose ol li { counter-increment: prose-ol; }

.prose ol li::before {
  content: counter(prose-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--c-slate);
  line-height: 1.9;
}

.prose a {
  color: var(--c-sea);
  border-bottom: 1px solid var(--c-line-sea);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.prose a:hover {
  color: var(--c-coral);
  border-bottom-color: var(--c-coral);
}

.prose .small,
.small {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-slate);
}

.index-text {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-slate);
}

/* ---------- 栅格（只用 7/5、8/4） ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.col-7 { grid-column: span 7; }
.col-5 { grid-column: span 5; }
.col-8 { grid-column: span 8; }
.col-4 { grid-column: span 4; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid var(--c-deep);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--c-deep);
  font-family: var(--font-body);
  font-size: 15px;
  letter-spacing: 0.08em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background-color 0.16s var(--ease),
              color 0.16s var(--ease), border-color 0.16s var(--ease);
}

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

.btn--solid {
  background: var(--c-coral);
  border-color: var(--c-coral);
  color: #FFFDF7;
}

.btn--solid:hover {
  background: var(--c-coral-deep);
  border-color: var(--c-coral-deep);
}

.btn--line:hover {
  border-color: var(--c-sea);
  color: var(--c-sea);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-slate);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--c-line-strong);
}

.breadcrumb a {
  color: var(--c-slate);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.breadcrumb a:hover {
  color: var(--c-sea);
  border-bottom-color: var(--c-line-sea);
}

/* ---------- 状态标签 ---------- */
.tag {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  white-space: nowrap;
  cursor: help;
}

.tag--mint {
  color: #2E7A5F;
  background: rgba(111, 195, 164, 0.16);
  border-color: rgba(111, 195, 164, 0.6);
}

.tag--amber {
  color: #86610F;
  background: rgba(228, 180, 76, 0.18);
  border-color: rgba(228, 180, 76, 0.6);
}

.tag--brick {
  color: #8C3625;
  background: rgba(193, 84, 63, 0.14);
  border-color: rgba(193, 84, 63, 0.55);
}

.tag__hint {
  position: absolute;
  left: 0;
  bottom: calc(100% + 9px);
  z-index: 30;
  width: max-content;
  max-width: 240px;
  padding: 8px 12px;
  border-radius: 10px;
  background: var(--c-deep);
  color: var(--c-sand);
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(5px);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--ease), visibility 0.16s;
}

.tag:hover .tag__hint,
.tag:focus-visible .tag__hint,
.tag:focus-within .tag__hint {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 图片容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-soft);
  background: var(--c-wave);
  aspect-ratio: 4 / 3;
  width: 100%;
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }

.media--organic {
  border-radius: 42% 58% 46% 54% / 54% 44% 56% 46%;
}

.media--plain { background: var(--c-paper); border: 1px solid var(--c-line); }

.media-figure { margin: 0; }

.media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-slate);
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: var(--space);
  background: var(--c-sand);
  border-top: 1px solid var(--c-line-strong);
  color: var(--c-deep);
}

.site-footer__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) var(--gutter) clamp(30px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.site-footer__kicker {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--c-slate);
}

.site-footer__name {
  margin-top: 8px;
  font-family: var(--font-head);
  font-weight: 250;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.14;
  color: var(--c-deep);
}

.site-footer__note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-slate);
}

.footer-col__title {
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-sea);
  margin-bottom: 16px;
}

.footer-col__list li + li { margin-top: 10px; }

.footer-col__list a {
  display: inline-block;
  font-size: 15px;
  color: var(--c-deep);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.footer-col__list a:hover {
  color: var(--c-sea);
  border-bottom-color: var(--c-sea);
}

.site-footer__legal {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px var(--gutter) 42px;
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-slate);
}

/* ---------- 平板 ---------- */
@media (max-width: 1040px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-7, .col-5, .col-8, .col-4 { grid-column: 1 / -1; }
}

/* ---------- 移动端导航 ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.26s var(--ease);
  }

  .site-nav[data-open] {
    max-height: 660px;
    margin-top: 22px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    text-align: left;
  }

  .site-nav__link {
    display: block;
    padding: 14px 6px;
    font-size: 17px;
    border-bottom: 1px solid var(--c-line);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    border-bottom-color: var(--c-coral);
  }
}

@media (max-width: 760px) {
  .quick-band__inner {
    flex-direction: column;
    gap: 0;
    padding-bottom: 4px;
  }

  .quick-band__label {
    padding: 10px 0 6px;
    border-right: 0;
  }

  .band-track { width: 100%; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__legal { flex-direction: column; gap: 6px; }
  .btn { width: 100%; justify-content: center; }
  .btn-row { width: 100%; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover { transform: none; }

  .band-track { scroll-behavior: auto; }
}