/* ==========================================================================
   太阳城服务 · 共享样式 /assets/site.css
   01 设计变量 · 02 重置 · 03 中文排版 · 04 按钮
   05 头部 · 06 移动导航 · 07 页脚
   08 页面骨架 · 09 通用组件 · 10 图片容器 · 11 响应式与偏好
   ========================================================================== */

/* 01 设计变量 ------------------------------------------------------------- */
:root {
  --sea: #0B3C5D;
  --paper: #FDF6EE;
  --sun: #FF6B35;
  --sun-deep: #C94A18;
  --sand: #E8B44A;
  --coral: #FF9E8A;
  --mist: #DCE9F1;
  --ink: #14202B;
  --slate: #5D7285;
  --foam: #FFFFFF;

  --header-h: 72px;
  --shell: 1200px;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas,
    "Liberation Mono", monospace;

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

/* 02 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

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

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

button {
  background: none;
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 3px;
  border-radius: 3px;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* 03 中文排版 ------------------------------------------------------------ */
p {
  margin: 0 0 1.4em;
}

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

strong, b {
  font-weight: 700;
}

.mono-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sun-deep);
  line-height: 1.4;
}

.mono-label::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--sun);
}

.display {
  margin: 0;
  font-size: clamp(44px, 9vw, 132px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.section-title {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.section-sub {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.8;
  color: var(--slate);
}

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.prose > h2,
.prose > h3 {
  margin: 40px 0 12px;
  line-height: 1.3;
  font-weight: 800;
}

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

.prose em,
.prose i {
  font-style: normal;
  background: linear-gradient(180deg, transparent 62%, rgba(255, 107, 53, 0.32) 62%);
  padding-inline: 2px;
}

/* 04 按钮 ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 14px;
}

.btn--sun {
  background-color: var(--sun-deep);
  border-color: var(--sun-deep);
  color: var(--foam);
}

.btn--sun:hover,
.btn--sun:focus-visible {
  background-color: var(--sun);
  border-color: var(--sun);
  color: var(--ink);
}

.btn--ghost {
  background-color: transparent;
  border-color: currentColor;
  color: inherit;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background-color: var(--sun);
  border-color: var(--sun);
  color: var(--ink);
}

.btn--ink {
  background-color: var(--sea);
  border-color: var(--sea);
  color: var(--paper);
}

.btn--ink:hover,
.btn--ink:focus-visible {
  background-color: var(--sun-deep);
  border-color: var(--sun-deep);
  color: var(--foam);
}

/* 05 头部 ---------------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background-color: var(--sea);
  color: var(--foam);
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 12px 28px -14px rgba(11, 60, 93, 0.8);
  transform: translateY(-180%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-color: var(--sand);
}

.site-header {
  --hdr-fg: var(--ink);
  --hdr-dim: var(--slate);
  --hdr-accent: var(--sun-deep);
  --hdr-line: rgba(11, 60, 93, 0.16);

  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  color: var(--hdr-fg);
  background-image: linear-gradient(
    180deg,
    rgba(253, 246, 238, 0.95) 0%,
    rgba(253, 246, 238, 0.74) 58%,
    rgba(253, 246, 238, 0) 100%
  );
  transition: color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--sea);
  opacity: 0;
  transition: opacity 0.24s var(--ease);
}

.site-header[data-scrolled="true"],
.site-header[data-open="true"] {
  --hdr-fg: var(--paper);
  --hdr-dim: rgba(253, 246, 238, 0.72);
  --hdr-accent: var(--sand);
  --hdr-line: rgba(253, 246, 238, 0.26);
  box-shadow: 0 16px 36px -30px rgba(11, 60, 93, 0.9);
}

.site-header[data-scrolled="true"]::before,
.site-header[data-open="true"]::before {
  opacity: 1;
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  padding-block: 10px;
  color: var(--hdr-fg);
}

.brand-mark {
  position: relative;
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background-image: radial-gradient(
    122% 122% at 50% 82%,
    var(--sun) 0%,
    var(--sun-deep) 48%,
    var(--sea) 100%
  );
  box-shadow: 0 0 0 1px rgba(11, 60, 93, 0.12);
  transition: transform 0.24s var(--ease);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: 30%;
  height: 2px;
  border-radius: 2px;
  background-color: var(--paper);
  opacity: 0.9;
}

.brand:hover .brand-mark,
.footer-brand-link:hover .brand-mark {
  transform: rotate(-8deg) scale(1.04);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.15;
}

.brand-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hdr-dim);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 20px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--hdr-fg);
  transition: color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--hdr-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.23s ease-out;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--hdr-accent);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.header-domain {
  padding: 6px 12px;
  border: 1px dashed var(--hdr-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--hdr-dim);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--hdr-line);
  border-radius: 12px;
  background-color: transparent;
  color: var(--hdr-fg);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--sun);
  background-color: rgba(255, 107, 53, 0.12);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--hdr-fg);
  transition: background-color 0.2s var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--hdr-fg);
  transition: transform 0.22s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.site-header[data-open="true"] .nav-toggle-bars {
  background-color: transparent;
}

.site-header[data-open="true"] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background-color: rgba(11, 60, 93, 0.12);
  overflow: hidden;
  transition: background-color 0.24s var(--ease);
}

.header-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--sun) 0%, var(--sand) 100%);
  transition: width 0.12s linear;
}

.site-header[data-scrolled="true"] .header-progress,
.site-header[data-open="true"] .header-progress {
  background-color: rgba(253, 246, 238, 0.2);
}

/* 06 移动导航 ------------------------------------------------------------ */
@media (max-width: 900px) {
  :root {
    --header-h: 64px;
  }

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

  .header-domain {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    max-height: calc(100vh - var(--header-h));
    padding: 16px clamp(16px, 4vw, 32px) 32px;
    overflow-y: auto;
    background-color: var(--sea);
    border-top: 1px solid rgba(253, 246, 238, 0.18);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-12px);
    transition: transform 0.24s var(--ease), opacity 0.24s var(--ease),
      visibility 0.24s var(--ease);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

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

  .nav-link {
    display: block;
    padding: 16px 0;
    border-bottom: 1px solid rgba(253, 246, 238, 0.14);
    border-radius: 0;
    font-size: 19px;
    font-weight: 600;
    color: var(--paper);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    color: var(--sand);
  }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 24px;
  }

  .nav-actions .btn {
    width: 100%;
  }

  .nav-actions .btn--ghost {
    border-color: rgba(253, 246, 238, 0.42);
    color: var(--paper);
  }
}

/* 07 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--sea);
  color: var(--paper);
  padding-block: clamp(48px, 6vw, 88px) clamp(24px, 3vw, 40px);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background-image: linear-gradient(
    90deg,
    var(--sun) 0%,
    var(--sand) 38%,
    var(--coral) 66%,
    rgba(220, 233, 241, 0.35) 100%
  );
}

.footer-shell {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(230px, 1.55fr) repeat(3, minmax(110px, 0.75fr));
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid rgba(253, 246, 238, 0.16);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 380px;
}

.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  align-self: flex-start;
  color: var(--paper);
}

.footer-brand-name {
  display: block;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.footer-brand-tag {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(253, 246, 238, 0.6);
}

.footer-brand-line {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(253, 246, 238, 0.78);
}

.footer-domain-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.footer-domain {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand);
  word-break: break-all;
}

.copy-domain {
  padding: 5px 14px;
  border: 1px solid rgba(253, 246, 238, 0.34);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: rgba(253, 246, 238, 0.88);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease);
}

.copy-domain:hover,
.copy-domain:focus-visible {
  background-color: rgba(255, 107, 53, 0.2);
  border-color: var(--sun);
  color: var(--paper);
}

.copy-domain[data-copied="true"] {
  background-color: var(--sun-deep);
  border-color: var(--sun-deep);
  color: var(--foam);
}

.copy-note {
  margin: 0;
  min-height: 1.4em;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--coral);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sand);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(253, 246, 238, 0.82);
  transition: color 0.2s var(--ease);
}

.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: var(--sun);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.23s ease-out;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--paper);
}

.footer-link:hover::after,
.footer-link:focus-visible::after {
  transform: scaleX(1);
}

.footer-link[aria-current="page"] {
  color: var(--sand);
  font-weight: 600;
}

.footer-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(16px, 3vw, 32px);
  padding-block: clamp(24px, 3.5vw, 40px);
  border-bottom: 1px solid rgba(253, 246, 238, 0.16);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.contact-item--wide {
  grid-column: 1 / -1;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(253, 246, 238, 0.55);
}

.contact-value {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.contact-note {
  font-size: 14.5px;
  color: rgba(253, 246, 238, 0.76);
  max-width: 82ch;
}

.footer-trust {
  margin: 0;
  padding-block: clamp(20px, 3vw, 28px);
  max-width: 84ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(253, 246, 238, 0.7);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: clamp(12px, 2vw, 20px);
  border-top: 1px solid rgba(253, 246, 238, 0.12);
}

.footer-closing {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(253, 246, 238, 0.72);
}

.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(253, 246, 238, 0.6);
}

/* 08 页面骨架 ------------------------------------------------------------ */
.page-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: calc(var(--header-h) + clamp(32px, 5vw, 64px)) clamp(16px, 4vw, 40px)
    clamp(48px, 7vw, 96px);
}

.page-shell--wide {
  max-width: 1320px;
}

.layout-rail {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(24px, 4vw, 40px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.breadcrumb a {
  color: var(--slate);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--sun-deep);
  border-bottom-color: var(--sun);
}

.breadcrumb-sep {
  color: var(--sand);
}

.breadcrumb [aria-current="page"] {
  color: var(--ink);
  letter-spacing: 0.06em;
}

/* 09 通用组件 ------------------------------------------------------------ */
.index-rail {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.index-link {
  position: relative;
  display: block;
  padding: 10px 12px 10px 18px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--slate);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.index-link::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 3px;
  background-color: var(--sun);
  transform: translateY(-50%);
  transition: height 0.2s var(--ease);
}

.index-link:hover,
.index-link:focus-visible {
  color: var(--ink);
  background-color: rgba(11, 60, 93, 0.05);
}

.index-link[aria-current="true"] {
  color: var(--sun-deep);
  font-weight: 600;
}

.index-link[aria-current="true"]::before {
  height: 18px;
}

.band {
  padding-block: clamp(24px, 3.5vw, 40px);
  background-color: var(--sea);
  color: var(--paper);
}

.band-track {
  display: flex;
  gap: clamp(12px, 2vw, 28px);
  padding-inline: clamp(16px, 4vw, 40px);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.band-item {
  flex: 0 0 auto;
  min-width: min(250px, 74vw);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
  border-left: 2px solid var(--sun);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background-color: rgba(253, 246, 238, 0.06);
  scroll-snap-align: start;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.band-item:hover {
  background-color: rgba(253, 246, 238, 0.12);
  border-left-color: var(--sand);
}

.band-item-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.band-item-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.band-item-count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(253, 246, 238, 0.66);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 32px);
  border: 1px solid rgba(11, 60, 93, 0.12);
  border-radius: 20px;
  background-color: var(--foam);
  color: var(--ink);
  transition: transform 0.23s ease-out, border-color 0.23s ease-out,
    box-shadow 0.23s ease-out;
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: var(--sun);
  box-shadow: 0 22px 44px -30px rgba(11, 60, 93, 0.6);
}

.card--drop {
  margin-top: clamp(0px, 3vw, 24px);
}

.card-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sun-deep);
}

.card-title {
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.card-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.card-arrow {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sea);
  transition: transform 0.23s ease-out, color 0.23s ease-out;
}

.card:hover .card-arrow,
.card:focus-within .card-arrow {
  transform: translateX(6px);
  color: var(--sun-deep);
}

/* 10 图片容器 ------------------------------------------------------------ */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(11, 60, 93, 0.1);
  border-radius: var(--radius-lg);
  background-image: linear-gradient(140deg, var(--mist) 0%, var(--paper) 62%, #fff2e4 100%);
}

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

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

.media-frame--square {
  aspect-ratio: 1 / 1;
}

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

.media-frame--band {
  aspect-ratio: 21 / 9;
}

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--slate);
}

.glow {
  position: absolute;
  width: clamp(220px, 40vw, 520px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  pointer-events: none;
  background-image: radial-gradient(
    circle at 50% 50%,
    rgba(255, 107, 53, 0.5) 0%,
    rgba(255, 158, 138, 0.22) 42%,
    rgba(255, 107, 53, 0) 72%
  );
}

/* 11 响应式与偏好 -------------------------------------------------------- */
@media (max-width: 1180px) {
  .header-domain {
    display: none;
  }
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: none;
  }
}

@media (max-width: 900px) {
  .layout-rail {
    grid-template-columns: minmax(0, 1fr);
  }

  .index-rail {
    position: static;
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .index-link {
    flex: 0 0 auto;
    padding: 8px 14px 8px 16px;
    border: 1px solid rgba(11, 60, 93, 0.14);
    white-space: nowrap;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

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

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

  .brand-tag {
    letter-spacing: 0.1em;
  }

  .btn {
    padding: 12px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .card:hover,
  .card:focus-within,
  .brand:hover .brand-mark,
  .footer-brand-link:hover .brand-mark {
    transform: none;
  }
}