/* =====================================================================
   2025~2026 个人电子作品集 · 布局与导航 (Layout & Navigation)
   固定透明表头（左标识 / 右导航）· 收拢式 Hero · 画布比例留白
   ===================================================================== */

/* ============================ 顶部导航 ============================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex; align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-slow) var(--ease),
              border-color var(--dur-slow) var(--ease),
              backdrop-filter var(--dur-slow) var(--ease);
}
.nav.is-scrolled {
  background: rgba(10, 10, 12, 0.62);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line-soft);
}

.nav__inner {
  width: 100%; max-width: var(--maxw); margin-inline: auto;
  padding-inline: max(20px, calc(var(--spacing) * 50));
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}

.brand {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-family: var(--font-display); font-weight: 500;
  letter-spacing: 0.02em; font-size: 0.92rem;
  flex-shrink: 0;
}
.brand__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(200, 164, 92, 0.75);
  flex-shrink: 0;
}
.brand small {
  color: var(--text-3); font-weight: 400; font-size: 0.6rem;
  letter-spacing: 0.2em; text-transform: uppercase;
}

/* 导航链接：hover 金色 + 下划线生长 */
.nav__links { display: flex; align-items: center; gap: clamp(1.4rem, 2.6vw, 2.4rem); }
.nav__links a {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.84rem; color: var(--text-2);
  letter-spacing: 0.03em;
  padding-block: 0.4em;
  transition: color var(--dur-slow) var(--ease);
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--accent);
  transition: right var(--dur-slow) var(--ease);
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { right: 0; }
.nav__links a.is-active { color: var(--text); }

.nav__right { display: flex; align-items: center; gap: 0.7rem; }

/* 语言切换：胶囊，激活=金底反色 */
.lang {
  display: inline-flex; align-items: center;
  border: 1px solid var(--line); border-radius: var(--pill); overflow: hidden;
  font-family: var(--font-display); font-size: 0.72rem;
}
.lang button {
  padding: 0.42em 0.85em; color: var(--text-3);
  letter-spacing: 0.05em;
  transition: color var(--dur-slow) var(--ease), background var(--dur-slow) var(--ease);
}
.lang button:hover { color: var(--text); }
.lang button.is-active { color: var(--ink); background: var(--accent); font-weight: 600; }

/* 移动端汉堡 */
.nav__burger {
  display: none;
  width: 40px; height: 40px; border-radius: var(--pill);
  border: 1px solid var(--line);
  align-items: center; justify-content: center; flex-direction: column; gap: 5px;
  transition: border-color var(--dur-slow) var(--ease), background var(--dur-slow) var(--ease);
}
.nav__burger:hover { border-color: rgba(200, 164, 92, 0.6); }
.nav__burger span {
  width: 15px; height: 1.4px; background: var(--text);
  transition: transform var(--dur-slow) var(--ease), opacity var(--dur-slow) var(--ease);
}
.nav__burger.is-open span:nth-child(1) { transform: translateY(6.4px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-6.4px) rotate(-45deg); }

/* 移动端抽屉：右上角下拉面板
   原来用 inset 铺满整个视口，3 个导航项垂直居中后中间大片空白，显得空荡。
   改成从汉堡下方展开的小卡片：宽度上限 292px、高度随内容、点外部或 ESC 收起。 */
.nav__drawer {
  position: fixed;
  top: calc(var(--nav-h) + 10px);
  right: max(14px, env(safe-area-inset-right, 0px));
  z-index: 99;
  width: min(248px, calc(100vw - 32px));
  max-height: calc(100vh - var(--nav-h) - 28px);
  max-height: calc(100dvh - var(--nav-h) - 28px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: rgba(18, 18, 22, 0.96);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.62);
  display: flex; flex-direction: column;
  padding: 8px 18px 16px;
  transform-origin: 100% 0;
  transform: translateY(-8px) scale(0.96);
  opacity: 0; visibility: hidden;
  transition: transform 0.34s var(--ease), opacity 0.26s var(--ease), visibility 0.34s;
}
.nav__drawer.is-open { transform: none; opacity: 1; visibility: visible; }
.nav__drawer a {
  font-family: var(--font-display); font-weight: 500;
  font-size: 1.06rem; letter-spacing: 0.02em; color: var(--text);
  padding: 0.92em 0; border-bottom: 1px solid var(--line-soft);
  transition: color var(--dur-slow) var(--ease), padding-left var(--dur-slow) var(--ease);
}
.nav__drawer a:last-of-type { border-bottom: 0; }
.nav__drawer a:hover, .nav__drawer a:active { color: var(--accent); padding-left: 0.2em; }
.nav__drawer-lang { margin-top: 14px; align-self: flex-start; }

/* 遮罩：只压暗页面，点击即收起抽屉 */
.nav__scrim {
  position: fixed; inset: var(--nav-h) 0 0 0; z-index: 98;
  background: rgba(6, 6, 8, 0.44);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.nav__scrim.is-open { opacity: 1; visibility: visible; }

/* ============================ Hero ============================ */
/* 全幅画布边距，而非居中窄容器 */
.hero.wrap { max-width: none; padding-inline: max(22px, calc(var(--spacing) * 50)); }

/* Hero 不再撑满整屏：高度随内容收拢，作品区紧随其后（消除中间空白带） */
.hero {
  position: relative; z-index: 1;
  min-height: 0;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: calc(var(--nav-h) + clamp(48px, 6.5vh, 88px));
  padding-block-end: clamp(40px, 5vh, 64px);
}
/* Hero 整块居中：与下方居中的鱼眼轮播共用同一条中轴 */
.hero__top {
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  gap: clamp(1rem, 1.8vw, 1.5rem);
  max-width: 980px;
  margin-inline: auto;
}
/* 标题限宽 → 断成均衡两行（text-wrap:balance 生效），居中后不塌成超长单行 */
.hero__top .display { max-width: min(100%, 12em); }
.hero__top .lead { margin-inline: auto; }
.hero__meta {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 0.6rem 1.8rem;
  margin-top: 0.6rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(244, 242, 237, 0.09);
  color: var(--text-3);
  font-size: 0.76rem; letter-spacing: 0.04em;
  max-width: 100%;
}
.hero__meta b { color: var(--text-2); font-weight: 500; font-family: var(--font-display); }
.hero__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; margin-top: 0.6rem; }

/* 滚动提示已随 Hero 收拢一并移除（作品区已进入首屏，无需该提示） */
.hero__scroll { display: none; }

/* ============================ 通用区块标题 ============================ */
.sec-head { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: clamp(28px, 4vw, 48px); }
.sec-head__row { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.2rem; flex-wrap: wrap; }
.sec-head h2 { font-size: clamp(1.9rem, 3.8vw, 3.1rem); letter-spacing: -0.035em; text-wrap: balance; }

/* 作品区块：标题与筛选也居中，与 Hero / 轮播共用同一条中轴 */
.works .sec-head { align-items: center; text-align: center; }
.works .sec-head__row { flex-direction: column; align-items: center; justify-content: center; gap: clamp(0.9rem, 1.6vw, 1.3rem); }
.works .filters { justify-content: center; }

/* ============================ 关于 / 联系 布局 ============================ */
.about-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.about-grid p + p { margin-top: 1.1em; }
.about-side { display: flex; flex-direction: column; align-items: flex-start; gap: 1.4rem; }
.fact { border-top: 1px solid var(--line-soft); padding-top: 0.9rem; }
.fact dt { font-family: var(--font-display); font-size: 0.64rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3); }
.fact dd { margin-top: 0.4rem; color: var(--text); font-size: 0.95rem; }

/* 联系页右栏说明文字 */
.note { color: var(--text-2); font-size: 0.95rem; line-height: 1.6; max-width: 32ch; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-list { display: flex; flex-direction: column; gap: 0.1rem; }
.contact-row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line-soft); }
.contact-row dt { color: var(--text-3); font-family: var(--font-display); letter-spacing: 0.04em; font-size: 0.85rem; }
.contact-row dd { text-align: right; overflow-wrap: anywhere; }
.contact-row dd a { color: var(--text); transition: color var(--dur-slow) var(--ease); }
.contact-row dd a:hover { color: var(--accent); }

/* ============================ 页脚 ============================ */
.footer { position: relative; z-index: 1; border-top: 1px solid var(--line-soft); padding-block: 44px; margin-top: auto; }
.footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap;
  color: var(--text-3); font-size: 0.74rem; letter-spacing: 0.03em;
}
.footer a { transition: color var(--dur-slow) var(--ease); }
.footer a:hover { color: var(--accent); }

/* ============================ 响应式断点 ============================ */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__burger { display: inline-flex; }
  .nav__right .lang { display: none; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero { padding-block-end: clamp(36px, 5vh, 54px); }
  .hero__meta { gap: 0.5rem 1.1rem; font-size: 0.72rem; }
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}
@media (max-width: 480px) {
  .hero { padding-block-end: clamp(32px, 4.5vh, 46px); }
  .hero__top { gap: 0.9rem; }
  .hero__cta .btn { padding: 0.72em 1.15em; font-size: 0.82rem; }
}
@media (min-width: 901px) {
  .nav__drawer { display: none; }
}