/* ==========================================================================
   安信10安卓 · 共享站点样式 /assets/site.css
   头部浮岛 · 页脚海岸层 · 工具类与基础组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

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

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

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

button { font: inherit; color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --ink-900: #0B2340;
  --ink-700: #123A5C;
  --mist-50: #F4F8FA;
  --coral-500: #F26B4E;
  --coral-100: #FDE4DC;
  --palm-500: #2F8F6B;
  --sand-300: #E8D9B8;
  --black-900: #14202B;
  --haze-200: #D8E2E8;
  --focus-500: #2C7BE5;
  --white: #FFFFFF;

  /* 字体 */
  --font-display: "Noto Serif SC", "Songti SC", "Source Han Serif SC", serif;
  --font-interface: Inter, "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺寸 */
  --maxw: 1280px;
  --prose-w: 720px;
  --header-h: 96px;
  --radius-pill: 999px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --hair: 1px solid var(--haze-200);

  /* 质感 */
  --shadow-soft: 0 18px 40px -30px rgba(11, 35, 64, 0.55);
  --shadow-island: 0 12px 30px -20px rgba(11, 35, 64, 0.65);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);

  /* 分区底色 */
  --glass: rgba(255, 255, 255, 0.82);
  --glass-strong: rgba(255, 255, 255, 0.96);
}

/* ---------- 3. 基础排版 ---------- */
html { font-size: 100%; }

body {
  margin: 0;
  padding-top: var(--header-h);
  font-family: var(--font-body);
  font-size: clamp(16px, 0.35vw + 15px, 17.5px);
  line-height: 1.75;
  color: var(--black-900);
  background-color: var(--mist-50);
  background-image:
    radial-gradient(ellipse 90% 60% at 8% -6%, rgba(232, 217, 184, 0.42), transparent 62%),
    radial-gradient(ellipse 70% 50% at 102% 4%, rgba(47, 143, 107, 0.10), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  margin-bottom: 0.55em;
}

h1 { font-size: clamp(30px, 4.2vw, 56px); }
h2 { font-size: clamp(24px, 3vw, 40px); }
h3 { font-size: clamp(19px, 1.8vw, 28px); }
h4 { font-size: clamp(17px, 1.2vw, 22px); }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--ink-700);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color 0.18s var(--ease);
}
a:hover { color: var(--coral-500); }

strong, b { font-weight: 700; color: var(--ink-900); }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

:focus-visible {
  outline: 2px solid var(--focus-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--ink-900);
  color: var(--white);
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--white);
}

/* ==========================================================================
   头部：悬浮浮岛
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 18px 20px 0;
  pointer-events: none;
  transition: padding 0.22s var(--ease);
}
.site-header[data-condensed] { padding-top: 10px; }

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: var(--maxw);
  margin: 0 auto;
}

/* 滚动进度线 */
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(18, 58, 92, 0.08);
  pointer-events: none;
  z-index: 100;
}
.scroll-meter-fill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--coral-500) 0%, var(--sand-300) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* 品牌浮岛 */
.brand-island {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 9px;
  border-radius: var(--radius-pill);
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(18, 58, 92, 0.12);
  box-shadow: var(--shadow-island);
  text-decoration: none;
  color: var(--ink-900);
  transition: padding 0.22s var(--ease), border-color 0.18s var(--ease);
}
.brand-island:hover {
  color: var(--ink-900);
  border-color: rgba(242, 107, 78, 0.5);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: var(--ink-900);
  color: var(--sand-300);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
  flex: none;
  transition: width 0.22s var(--ease), height 0.22s var(--ease), font-size 0.22s var(--ease);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}
.brand-name {
  font-family: var(--font-interface);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--ink-700);
  opacity: 0.72;
}

.site-header[data-condensed] .brand-island { padding: 6px 14px 6px 6px; }
.site-header[data-condensed] .brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  font-size: 14px;
}
.site-header[data-condensed] .brand-sub { display: none; }

/* 移动导航按钮 */
.nav-toggle {
  pointer-events: auto;
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 17px 10px 15px;
  border: 1px solid rgba(18, 58, 92, 0.14);
  border-radius: var(--radius-pill);
  background: var(--ink-900);
  color: #EAF2F8;
  font-family: var(--font-interface);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: var(--shadow-island);
  transition: background-color 0.18s var(--ease);
}
.nav-toggle:hover { background: var(--ink-700); }

.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 16px;
  height: 14px;
  flex: none;
}
.nav-toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.18s var(--ease);
}
.nav-toggle[data-open] .nav-toggle-bar:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[data-open] .nav-toggle-bar:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

/* 导航胶囊 */
.nav-island {
  pointer-events: auto;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border-radius: var(--radius-pill);
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(18, 58, 92, 0.12);
  box-shadow: var(--shadow-island);
}

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

.nav-link {
  display: inline-block;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-700);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
              box-shadow 0.18s var(--ease);
}
.nav-link:hover {
  background: rgba(18, 58, 92, 0.08);
  color: var(--ink-900);
}
.nav-link[aria-current="page"] {
  background: var(--coral-100);
  color: var(--ink-900);
  box-shadow: inset 0 0 0 1px rgba(242, 107, 78, 0.4);
}
.nav-link[aria-current="page"]:hover { background: var(--coral-100); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 4px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--coral-500);
  color: var(--white);
  font-family: var(--font-interface);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 10px 20px -12px rgba(242, 107, 78, 0.95);
  transition: background-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.nav-cta:hover {
  background: #D9543A;
  color: var(--white);
  box-shadow: 0 12px 24px -12px rgba(242, 107, 78, 1);
}

/* ==========================================================================
   页脚：海岸层
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 112px);
  background: var(--ink-900);
  color: #C6D6E2;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -30%;
  height: 320px;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 28% 0%, rgba(47, 143, 107, 0.22), transparent 62%),
    radial-gradient(ellipse at 74% 22%, rgba(242, 107, 78, 0.16), transparent 58%),
    radial-gradient(ellipse at 50% 90%, rgba(232, 217, 184, 0.10), transparent 70%);
}

.footer-coast {
  display: flex;
  height: 6px;
  position: relative;
  z-index: 1;
}
.coast-band { display: block; flex: 1 1 0; height: 100%; }
.coast-band:nth-child(1) { background: var(--coral-500); flex-grow: 3; }
.coast-band:nth-child(2) { background: var(--sand-300); flex-grow: 5; }
.coast-band:nth-child(3) { background: var(--palm-500); flex-grow: 2; }

.footer-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.35fr 0.9fr 0.9fr 1.4fr;
  gap: 48px 32px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) 24px clamp(28px, 3vw, 44px);
}

.footer-brand { display: flex; flex-direction: column; gap: 12px; }

.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(232, 217, 184, 0.14);
  border: 1px solid rgba(232, 217, 184, 0.36);
  color: var(--sand-300);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
}

.footer-brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}
.footer-brand-note {
  margin: 0;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.8;
  color: #9CB3C5;
}

.footer-heading {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--sand-300);
}

.footer-list { display: flex; flex-direction: column; gap: 10px; margin: 0; padding: 0; }

.footer-link {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.6;
  color: #C6D6E2;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-link:hover {
  color: var(--white);
  border-bottom-color: var(--coral-500);
}

.footer-contact { color: #C6D6E2; }

.footer-mail,
.footer-tel {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--white);
  -webkit-user-select: all;
  user-select: all;
  word-break: break-all;
}
.footer-tel { color: var(--sand-300); }

.footer-addr {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #9CB3C5;
}

.footer-note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.85;
  color: #7F97AA;
  max-width: 34ch;
}

.footer-base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid rgba(216, 226, 232, 0.14);
}
.footer-copy,
.footer-icp,
.footer-domain {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #7F97AA;
}
.footer-icp { color: #9CB3C5; }
.footer-domain { margin-left: auto; }

/* ==========================================================================
   通用工具类与基础组件
   ========================================================================== */

/* 容器 */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}
.prose { max-width: var(--prose-w); }

/* 章节 */
.section { padding: clamp(44px, 6vw, 88px) 0; }
.section--dark {
  background: var(--ink-900);
  color: #DCE7EF;
}
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--white); }
.section--sand { background: rgba(232, 217, 184, 0.28); }

.lead {
  font-size: clamp(17px, 0.9vw + 15px, 20px);
  line-height: 1.72;
  color: var(--ink-700);
}

/* 面包屑 */
.breadcrumbs { padding-top: 28px; }
.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #5C7183;
}
.breadcrumbs-list li { display: inline-flex; align-items: center; }
.breadcrumbs-list li + li::before {
  content: "/";
  padding-right: 8px;
  color: var(--haze-200);
}
.breadcrumbs-list a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.breadcrumbs-list a:hover {
  color: var(--coral-500);
  border-bottom-color: currentColor;
}

/* 标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-700);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--coral-500);
  flex: none;
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--sand-300);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-interface);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.btn--primary {
  background: var(--coral-500);
  color: var(--white);
  box-shadow: 0 16px 28px -18px rgba(242, 107, 78, 0.95);
}
.btn--primary:hover {
  background: #D9543A;
  color: var(--white);
}
.btn--ghost {
  background: transparent;
  color: var(--ink-900);
  border-color: rgba(18, 58, 92, 0.26);
}
.btn--ghost:hover {
  background: rgba(18, 58, 92, 0.06);
  border-color: var(--ink-900);
  color: var(--ink-900);
}
.btn--quiet {
  background: var(--sand-300);
  color: var(--ink-900);
}
.btn--quiet:hover {
  background: #DECD9F;
  color: var(--ink-900);
}

/* 容器卡片 */
.card {
  padding: 26px;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid rgba(18, 58, 92, 0.10);
  box-shadow: var(--shadow-soft);
}
.card--flat {
  background: rgba(255, 255, 255, 0.62);
  box-shadow: none;
}
.card--sand {
  background: var(--sand-300);
  border-color: rgba(18, 58, 92, 0.08);
  box-shadow: none;
}
.card--coral {
  background: var(--coral-100);
  border-color: rgba(242, 107, 78, 0.28);
  box-shadow: none;
}

/* 栅格 */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1fr) 320px; gap: 48px; }

/* 状态 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(18, 58, 92, 0.07);
  color: var(--ink-700);
  font-family: var(--font-interface);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.5;
}
.tag--ok {
  background: rgba(47, 143, 107, 0.13);
  color: #1F6B4E;
}
.tag--coral {
  background: var(--coral-100);
  color: #B3402A;
}
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--palm-500);
  flex: none;
}

/* 分隔线 */
.hairline {
  border: 0;
  border-top: 1px solid var(--haze-200);
  margin: 0;
}

/* 图片容器基础 */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid rgba(18, 58, 92, 0.10);
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg,
      rgba(18, 58, 92, 0.07) 0%,
      rgba(47, 143, 107, 0.12) 52%,
      rgba(232, 217, 184, 0.42) 100%);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: #5C7183;
}

/* 渐次显现（由 JS 打开 data-motion 后才生效，无 JS 时内容始终可见） */
html[data-motion="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
html[data-motion="on"] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  :root { --header-h: 92px; }
  .grid--split { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-shell {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px 28px;
  }
  .footer-brand-note,
  .footer-note { max-width: none; }
}

@media (max-width: 980px) {
  :root { --header-h: 84px; }

  html { scroll-padding-top: 96px; }

  .site-header { padding: 12px 16px 0; }
  .site-header[data-condensed] { padding-top: 8px; }

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

  .nav-island {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-left: 0;
    padding: 12px;
    border-radius: var(--radius-lg);
    background: var(--glass-strong);
    border: 1px solid rgba(18, 58, 92, 0.12);
    box-shadow: 0 28px 54px -30px rgba(11, 35, 64, 0.6);
  }
  .nav-island[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav-link {
    display: block;
    padding: 12px 14px;
    border-radius: 12px;
  }
  .nav-cta {
    margin: 6px 0 0;
    padding: 13px 18px;
  }

  .wrap { padding-inline: 20px; }
  .footer-shell { padding-inline: 20px; }
  .footer-base { padding-inline: 20px; }
}

@media (max-width: 720px) {
  :root { --header-h: 78px; }

  body { line-height: 1.72; }

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

  .footer-shell { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .footer-domain { margin-left: 0; }

  .brand-sub { font-size: 9.5px; letter-spacing: 0.16em; }
  .card { padding: 20px; }
}

@media (max-width: 400px) {
  .nav-toggle-label { display: none; }
  .nav-toggle { padding: 11px 13px; }
}

/* ---------- 动效降级 ---------- */
@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;
  }
  html[data-motion="on"] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}