/* ============================================================
   杨威 · 个人主页
   设计基调：暖纸色 / 墨绿字 / 陶土橙点缀 · 信笺式克制美学
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

@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;
  }
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

a {
  color: var(--color-accent-ink);
  text-decoration: none;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}
a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

/* ---------- 无障碍：跳转链接 & 焦点 ---------- */
.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -3rem;
  z-index: var(--z-modal);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-small);
  transition: top var(--dur-short) var(--ease-out);
}
.skip-link:focus {
  top: var(--space-md);
  text-decoration: none;
}

:focus-visible {
  outline: 2.5px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-small);
}

/* ============================================================
   导航
   ============================================================ */
.nav-edge {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0.85rem var(--page-gutter);
  background: color-mix(in oklch, var(--color-paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: var(--rule-hairline) solid var(--color-rule-soft);
}

.wordmark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.08em;
}
.wordmark:hover {
  text-decoration: none;
  color: var(--color-accent-ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 2vw, 1.6rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  padding: 0.3rem 0;
  position: relative;
  transition: color var(--dur-short) var(--ease-out);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-short) var(--ease-out);
}
.nav-links a:hover,
.nav-links a.is-active {
  color: var(--color-ink);
  text-decoration: none;
}
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: var(--rule-hairline) solid var(--color-rule);
  border-radius: var(--radius-small);
  cursor: pointer;
}
.nav-toggle span {
  width: 18px;
  height: 1.6px;
  background: var(--color-ink);
  transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.6px) rotate(-45deg);
}

/* ============================================================
   布局容器
   ============================================================ */
main {
  display: block;
}

.section {
  padding-block: clamp(3.5rem, 9vw, 7rem);
  padding-inline: var(--page-gutter);
}
.section--tint {
  background: var(--color-paper-2);
  border-block: var(--rule-hairline) solid var(--color-rule-soft);
}
.wrap {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
}
.wrap--prose {
  max-width: var(--prose-width);
}

/* 板块小标题（眉题） */
.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-sm);
  font-weight: 600;
}
.section-title {
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-lg);
}
.section-title .accent {
  color: var(--color-accent);
}

.lede {
  font-size: var(--text-md);
  color: var(--color-ink-soft);
  line-height: 1.7;
}

/* ============================================================
   英雄区
   ============================================================ */
.hero {
  padding-block: clamp(4rem, 12vw, 8.5rem) clamp(3rem, 8vw, 6rem);
  padding-inline: var(--page-gutter);
}
.hero-inner {
  max-width: var(--prose-width);
  margin-inline: auto;
}
.dateline {
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  color: var(--color-muted);
  margin: 0 0 var(--space-lg);
}
.hero h1 {
  font-size: var(--text-display);
  margin: 0 0 var(--space-lg);
  letter-spacing: 0.01em;
}
.hero .lede {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  margin-bottom: var(--space-md);
}
.hero p {
  margin: 0 0 var(--space-md);
  color: var(--color-ink-soft);
}
.hero p:last-of-type {
  margin-bottom: 0;
}

/* ============================================================
   关于我（含肖像槽）
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}
@media (min-width: 56rem) {
  .about-grid {
    grid-template-columns: 1.6fr 1fr;
  }
}

.portrait {
  margin: 0;
}
.portrait-frame {
  position: relative;
  border-radius: var(--radius-large);
  overflow: hidden;
  background: var(--color-paper-3);
  border: var(--rule-hairline) solid var(--color-rule-soft);
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
}
.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.portrait-fallback {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(120% 120% at 30% 20%, var(--color-accent-soft), transparent 60%),
    var(--color-paper-3);
  color: var(--color-accent-ink);
}
.portrait-fallback .mono {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5rem);
  line-height: 1;
}
.portrait-fallback .hint {
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: 0.1em;
}
.portrait figcaption {
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-muted);
  font-style: italic;
  line-height: 1.6;
}

.prose p {
  margin: 0 0 var(--space-md);
  color: var(--color-ink-soft);
}
.prose p:last-child {
  margin-bottom: 0;
}

.fact-list {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}
.fact-list li {
  display: flex;
  gap: var(--space-md);
  align-items: baseline;
  padding-bottom: var(--space-sm);
  border-bottom: var(--rule-hairline) solid var(--color-rule-soft);
}
.fact-list .k {
  flex: 0 0 5.5rem;
  color: var(--color-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}
.fact-list .v {
  color: var(--color-ink);
}

/* ============================================================
   我的故事
   ============================================================ */
.story p {
  margin: 0 0 var(--space-md);
  color: var(--color-ink-soft);
}
.pullquote {
  margin: var(--space-xl) 0;
  padding: var(--space-lg) var(--space-xl);
  border-left: 3px solid var(--color-accent);
  background: var(--color-paper-2);
  border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.55rem);
  line-height: 1.6;
  color: var(--color-ink);
}
@media (prefers-color-scheme: dark) {
  .pullquote {
    background: var(--color-paper-3);
  }
}

/* ============================================================
   做事方式
   ============================================================ */
.method-list {
  margin: 0;
  display: grid;
  gap: var(--space-lg);
}
.method-list > div {
  padding-left: var(--space-lg);
  border-left: var(--rule-hairline) solid var(--color-rule);
  position: relative;
}
.method-list > div::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}
.method-list dt {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-2xs);
}
.method-list dd {
  margin: 0;
  color: var(--color-ink-soft);
}

/* ============================================================
   长期主义 · 五项投入
   ============================================================ */
.ledger {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-md);
}
.ledger li {
  padding: var(--space-lg);
  background: var(--color-paper);
  border: var(--rule-hairline) solid var(--color-rule-soft);
  border-radius: var(--radius-medium);
  transition: transform var(--dur-short) var(--ease-out), border-color var(--dur-short);
}
.ledger li:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}
.ledger strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-accent-ink);
  margin-bottom: var(--space-2xs);
}
.ledger span {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ============================================================
   文字 / 精选作品
   ============================================================ */
.writing-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.writing-head .section-title {
  margin-bottom: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: var(--space-md);
}
.card {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background: var(--color-paper);
  border: var(--rule-hairline) solid var(--color-rule-soft);
  border-radius: var(--radius-medium);
  transition: transform var(--dur-short) var(--ease-out), border-color var(--dur-short), box-shadow var(--dur-long);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 14px 40px -22px color-mix(in oklch, var(--color-ink) 45%, transparent);
  text-decoration: none;
}
.card .tag {
  align-self: flex-start;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent-ink);
  background: var(--color-accent-soft);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: var(--space-md);
}
.card h3 {
  font-size: var(--text-lg);
  margin: 0 0 var(--space-xs);
  line-height: 1.35;
}
.card p {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.65;
}
.card .more {
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-accent-ink);
  letter-spacing: 0.04em;
}

/* 金句条 */
.quotes {
  margin-top: var(--space-2xl);
  display: grid;
  gap: var(--space-lg);
}
.quote {
  border-top: var(--rule-hairline) solid var(--color-rule);
  padding-top: var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
  line-height: 1.6;
  color: var(--color-ink);
}
.quote cite {
  display: block;
  margin-top: var(--space-xs);
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

/* ============================================================
   联系
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: start;
}
@media (min-width: 50rem) {
  .contact-grid {
    grid-template-columns: 1.2fr 1fr;
  }
}
.contact p {
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-md);
}
.contact-channels {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}
.contact-channels li {
  display: flex;
  gap: var(--space-md);
  align-items: baseline;
  padding: var(--space-sm) 0;
  border-bottom: var(--rule-hairline) solid var(--color-rule-soft);
}
.contact-channels .k {
  flex: 0 0 4.5rem;
  color: var(--color-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}
.contact-channels .v {
  color: var(--color-ink);
}
.contact-note {
  background: var(--color-paper);
  border: var(--rule-hairline) solid var(--color-rule-soft);
  border-radius: var(--radius-large);
  padding: var(--space-xl);
}
.contact-note h3 {
  font-size: var(--text-xl);
  margin: 0 0 var(--space-sm);
}
.contact-note p {
  color: var(--color-muted);
  font-size: var(--text-sm);
  margin: 0;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  padding: var(--space-2xl) var(--page-gutter) var(--space-xl);
  border-top: var(--rule-hairline) solid var(--color-rule-soft);
  background: var(--color-paper-2);
}
.footer-inner {
  max-width: var(--content-width);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-muted);
  font-size: var(--text-sm);
}
.footer-inner a {
  color: var(--color-muted);
}
.signature {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-ink);
  margin: 0;
}
.postscript {
  font-size: var(--text-xs);
  color: var(--color-muted);
  max-width: 32rem;
  line-height: 1.6;
}

/* ============================================================
   滚动渐入（克制）
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-long) var(--ease-out), transform var(--dur-long) var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   响应式：移动端导航
   ============================================================ */
@media (max-width: 42rem) {
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: color-mix(in oklch, var(--color-paper) 97%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: var(--rule-hairline) solid var(--color-rule-soft);
    padding: var(--space-sm) var(--page-gutter) var(--space-md);
    clip-path: inset(0 0 100% 0);
    opacity: 0;
    pointer-events: none;
    transition: clip-path var(--dur-short) var(--ease-out), opacity var(--dur-short);
  }
  .nav-links.is-open {
    clip-path: inset(0 0 0 0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: var(--space-sm) 0;
    border-bottom: var(--rule-hairline) solid var(--color-rule-soft);
  }
  .nav-links a::after {
    display: none;
  }
}