/* ==========================================================================
   个人主页 —— Material Design 3 配色
   色板由头像 (public/assets/avatar.jpg) 经 MD3 算法提取种子色 #f08353 生成
   ========================================================================== */

:root {
  color-scheme: dark;

  /* ---------- MD3 亮色 ---------- */
  --md-primary: #9c4418;
  --md-on-primary: #ffffff;
  --md-primary-container: #ffdbcd;
  --md-on-primary-container: #360f00;
  --md-secondary: #77574b;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #ffdbcd;
  --md-on-secondary-container: #2c160c;
  --md-tertiary: #675f30;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #f0e3a8;
  --md-on-tertiary-container: #211c00;
  --md-surface: #fffbff;
  --md-on-surface: #201a18;
  --md-surface-variant: #f5ded6;
  --md-on-surface-variant: #53433e;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #fef1ed;
  --md-surface-container: #f8ebe7;
  --md-surface-container-high: #f2e5e1;
  --md-surface-container-highest: #ede0dc;
  --md-outline: #85736d;
  --md-outline-variant: #d8c2ba;
  --md-inverse-primary: #ffb597;
  --md-inverse-surface: #362f2c;
  --md-inverse-on-surface: #fbeeea;

  /* ---------- 版式 ---------- */
  --content-width: 68rem;
  --pad: clamp(1.25rem, 5vw, 4rem);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --transition: 0.22s cubic-bezier(0.2, 0, 0, 1);
}

html[data-theme="dark"] {
  color-scheme: dark;

  /* ---------- MD3 暗色 ---------- */
  --md-primary: #ffb597;
  --md-on-primary: #591d00;
  --md-primary-container: #7d2d01;
  --md-on-primary-container: #ffdbcd;
  --md-secondary: #e7beae;
  --md-on-secondary: #442a20;
  --md-secondary-container: #5d4034;
  --md-on-secondary-container: #ffdbcd;
  --md-tertiary: #d3c78e;
  --md-on-tertiary: #373006;
  --md-tertiary-container: #4f471b;
  --md-on-tertiary-container: #f0e3a8;
  --md-surface: #201a18;
  --md-on-surface: #ede0dc;
  --md-surface-variant: #53433e;
  --md-on-surface-variant: #d8c2ba;
  --md-surface-container-lowest: #120d0b;
  --md-surface-container-low: #201a18;
  --md-surface-container: #251e1c;
  --md-surface-container-high: #2f2826;
  --md-surface-container-highest: #3a3331;
  --md-outline: #a08d86;
  --md-outline-variant: #53433e;
  --md-inverse-primary: #9c4418;
  --md-inverse-surface: #ede0dc;
  --md-inverse-on-surface: #362f2c;
}

html[data-theme="light"] {
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
  /* 隐藏滚动条但保留滚动能力（滚轮 / 触控 / 键盘仍然可用） */
  scrollbar-width: none;
  -ms-overflow-style: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}

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

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

/* 顶部柔光：取自 primary-container，弱化到几乎不可见 */
.aurora {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(52rem 30rem at 82% -10%, color-mix(in srgb, var(--md-primary) 14%, transparent), transparent 62%),
    radial-gradient(44rem 26rem at 4% 2%, color-mix(in srgb, var(--md-tertiary) 10%, transparent), transparent 60%);
}

/* ---------- 顶栏 ---------- */

/* 横条铺满视口，模糊背景覆盖整条宽度 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--md-surface) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background-color var(--transition);
}

.topbar::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: var(--md-outline-variant);
  opacity: 0.5;
}

/* 内层只负责把内容对齐到正文宽度 */
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1rem var(--pad);
}

.mark {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  padding: 0;
  border-radius: var(--radius-full);
  color: var(--md-on-primary-container);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  /* 大头像还在视口内时隐藏 */
  opacity: 0;
  visibility: hidden;
  transform: scale(0.94);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
}

/* 头像滚出顶栏后才显现 */
.mark.is-visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 原图人物偏左偏下，缩略图里把脸摆到中心 */
  object-position: 46% 42%;
  border-radius: var(--radius-full);
}

.mark-initial {
  display: none;
}

.mark:focus-visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.mark:hover {
  transform: scale(1.06);
}

.topnav {
  display: flex;
  gap: 0.3rem;
  margin-left: auto;
}

.topnav a {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition);
}

.topnav a:hover {
  background: var(--md-surface-container-high);
  color: var(--md-on-surface);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  padding: 0;
  border: none;
  border-radius: var(--radius-full);
  background: var(--md-surface-container-high);
  color: var(--md-on-surface-variant);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
}

.theme-toggle:hover {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

html[data-theme="dark"] .icon-sun,
html[data-theme="light"] .icon-moon {
  display: none;
}

/* ---------- 主内容 ---------- */

main {
  position: relative;
  z-index: 1;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - 4.75rem);
  padding: 3rem 0 4rem;
}

/* 头像：MD3 头像槽位，外圈用 primary → tertiary 渐变 */
.avatar {
  width: clamp(9rem, 24vw, 13rem);
  height: clamp(9rem, 24vw, 13rem);
  margin-bottom: 2rem;
  padding: 7px;
  border-radius: var(--radius-full);
  background: linear-gradient(145deg, var(--md-primary), var(--md-tertiary));
  box-shadow: 0 14px 40px -16px color-mix(in srgb, var(--md-primary) 60%, transparent);
}

.avatar img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--md-primary);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.name {
  margin: 0.9rem 0 0;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--md-on-surface);
  overflow-wrap: break-word;
}

.dot {
  color: var(--md-primary);
}

.tagline {
  max-width: 36rem;
  margin: 1rem 0 0;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  line-height: 1.5;
  font-weight: 500;
  color: var(--md-on-surface-variant);
}

.summary {
  max-width: 34rem;
  margin: 1.1rem 0 2.2rem;
  color: var(--md-on-surface-variant);
  font-size: clamp(0.95rem, 2vw, 1.02rem);
}

/* MD3 按钮组 */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color var(--transition), box-shadow var(--transition),
    transform var(--transition);
}

/* MD3 Filled Button */
.btn.filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.btn.filled:hover {
  background: color-mix(in srgb, var(--md-primary) 88%, var(--md-on-surface));
  box-shadow: 0 4px 12px -4px color-mix(in srgb, var(--md-primary) 60%, transparent);
  transform: translateY(-1px);
}

/* MD3 Outlined Button */
.btn.outlined {
  border: 1px solid var(--md-outline);
  color: var(--md-primary);
}

.btn.outlined:hover {
  background: color-mix(in srgb, var(--md-primary) 8%, transparent);
  transform: translateY(-1px);
}

/* MD3 图标按钮 */
.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 2.6rem 0 0;
  padding: 0;
  list-style: none;
}

.socials a {
  display: grid;
  place-items: center;
  width: 2.9rem;
  height: 2.9rem;
  border-radius: var(--radius-full);
  background: var(--md-surface-container-high);
  color: var(--md-on-surface-variant);
  transition: background-color var(--transition), color var(--transition),
    transform var(--transition);
}

/* 品牌图标是彩色矢量图，不随主题变色 */
.socials .brand-icon {
  display: block;
  width: 20px;
  height: 20px;
  border-radius: 5px;
}

.socials a:hover {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  transform: translateY(-2px);
}

/* ---------- 分区 ---------- */

.section {
  padding: 4rem 0;
  border-top: 1px solid var(--md-outline-variant);
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 1.6rem;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 650;
  letter-spacing: -0.015em;
  color: var(--md-on-surface);
}

.num {
  color: var(--md-primary);
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: 500;
}

.section-body {
  max-width: 42rem;
}

.section-body > p {
  margin: 0 0 1.1rem;
  color: var(--md-on-surface-variant);
}

/* MD3 chips */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-full);
  color: var(--md-on-surface-variant);
  font-size: 0.82rem;
  font-weight: 500;
}

/* MD3 卡片列表 */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

/* 只放一张卡片时（联系区）限制宽度，避免拉通整行 */
.cards > :only-child {
  max-width: 22rem;
}

.card {
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  background: var(--md-surface-container);
  transition: background-color var(--transition), transform var(--transition);
}

.card:hover {
  background: var(--md-surface-container-high);
  transform: translateY(-2px);
}

.card-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  flex: 0 0 auto;
  border-radius: var(--radius-sm);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 650;
  color: var(--md-on-surface);
}

.card p {
  margin: 0;
  color: var(--md-on-surface-variant);
  font-size: 0.92rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.9rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-size: 0.82rem;
  font-weight: 600;
  transition: background-color var(--transition), transform var(--transition);
}

.card-link:hover {
  background: color-mix(in srgb, var(--md-primary-container) 80%, var(--md-primary));
  transform: translateY(-1px);
}

/* ---------- 页脚 ---------- */

.footer {
  position: relative;
  z-index: 1;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2rem var(--pad) 3rem;
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 0.8rem;
}

.footer p {
  margin: 0;
}

@media (max-width: 560px) {
  .topnav {
    gap: 0;
  }

  .topnav a {
    padding: 0.4rem 0.6rem;
    font-size: 0.82rem;
  }
}

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

  * {
    transition: none !important;
    transform: none !important;
  }
}