/* ============================================
   Lenscape — chusanji-inspired + Apple typography
   设计原则：白底、照片为主体、字号节奏严苛、节制作 Apple 润色
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --t-h1:       28px;
  --t-h2:       18px;
  --t-body:     15px;
  --t-meta:     13px;
  --t-foot:     12px;
  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 32px;
  --s5: 48px;
  --s6: 72px;
  --c-text:      #1a1a1a;
  --c-text-sub:  #666;
  --c-text-mute: #999;
  --c-line:      rgba(0, 0, 0, 0.08);
  --c-bg:        #ffffff;
  --ease:        cubic-bezier(0.4, 0, 0.2, 1);

  /* 侧栏宽度 */
  --nav-width: 224px;
  --nav-gap: 14px;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* macOS 壁纸式环境光：让玻璃有东西可透 */
  background:
    radial-gradient(42% 38% at 6% 12%, rgba(255, 183, 122, 0.22), transparent 72%),
    radial-gradient(38% 42% at 4% 88%, rgba(122, 168, 255, 0.20), transparent 72%),
    radial-gradient(42% 40% at 96% 26%, rgba(186, 145, 255, 0.14), transparent 72%),
    radial-gradient(46% 44% at 88% 92%, rgba(110, 210, 200, 0.12), transparent 72%),
    linear-gradient(180deg, #fcfcfd 0%, #f4f5f8 100%);
  background-attachment: fixed;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  font-size: var(--t-body);
  line-height: 1.55;
  color: var(--c-text);
  background: transparent;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.has-side-nav {
  padding-left: calc(var(--nav-width) + var(--nav-gap) * 2);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

/* ============================================
   左侧导航：macOS Liquid Glass 悬浮面板
   与年份工具条同一套材质配方
   ============================================ */
.site-header {
  position: fixed;
  top: var(--nav-gap);
  left: var(--nav-gap);
  bottom: var(--nav-gap);
  width: var(--nav-width);
  z-index: 100;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(36px) saturate(200%);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.12),
    0 3px 10px rgba(0, 0, 0, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(255, 255, 255, 0.45);
  display: flex;
  flex-direction: column;
  padding: 28px 18px 22px;
  overflow: hidden;
  isolation: isolate;
}

/* 玻璃斜切高光（Liquid Glass 的标志性反光） */
.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.12) 28%,
    rgba(255, 255, 255, 0) 50%,
    rgba(255, 255, 255, 0.10) 100%
  );
}

.nav-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
  height: 100%;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* ----- 顶部：品牌/Logo ----- */
.nav-top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 6px 2px 4px;
}

.nav-logo {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.10);
  flex-shrink: 0;
}

.nav-logo--fallback {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(160deg, #2c2c2e, #111);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.22);
}

.brand {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

/* ----- 中部：导航链接（垂直） ----- */
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  list-style: none;
  flex: 1;
}

.nav-links a {
  display: flex;
  align-items: center;
  font-size: 14px;
  font-weight: 400;
  color: var(--c-text-sub);
  padding: 9px 14px;
  border-radius: 12px;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.nav-links a:hover {
  color: var(--c-text);
  background: rgba(0, 0, 0, 0.045);
}

.nav-links a.active {
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.75);
  font-weight: 500;
  box-shadow:
    0 1px 4px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

/* ----- 底部：站点 meta ----- */
.nav-foot {
  font-size: 11px;
  color: var(--c-text-mute);
  letter-spacing: 0.04em;
  line-height: 1.6;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}

.nav-foot strong {
  color: var(--c-text);
  font-weight: 500;
  display: block;
  margin-bottom: 2px;
  letter-spacing: -0.005em;
}

/* ============================================
   移动端：顶部悬浮玻璃条
   ============================================ */
@media (max-width: 900px) {
  :root { --nav-width: 100%; --nav-gap: 8px; }
  body.has-side-nav { padding-left: 0; }
  .site-header {
    top: var(--nav-gap); left: var(--nav-gap); right: var(--nav-gap); bottom: auto;
    width: auto;
    height: 54px;
    flex-direction: row;
    align-items: center;
    padding: 0 16px;
    border-radius: 16px;
  }
  .nav-inner {
    flex-direction: row;
    align-items: center;
    gap: 0;
    justify-content: space-between;
  }
  .nav-top { margin-bottom: 0; }
  .nav-links {
    flex-direction: row;
    gap: 2px;
  }
  .nav-links a {
    padding: 6px 10px;
    font-size: 13px;
    border-radius: 9px;
  }
  .nav-foot { display: none; }
}

/* ============================================
   主容器
   ============================================ */
.site-main {
  padding-top: 0;
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--s3);
}

/* ============================================
   首页简介
   ============================================ */
.intro {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--s6) var(--s3) var(--s5);
}

.intro__line {
  font-size: var(--t-foot);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-text-mute);
}

.intro__title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-top: var(--s2);
  max-width: 720px;
}

/* ============================================
   年份 pill 工具条
   ============================================ */
.year-toolbar {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--s2) var(--s3);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  position: sticky;
  top: var(--nav-gap);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  z-index: 50;
  border: 1px solid transparent;
  border-radius: 16px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.year-toolbar.is-scrolled {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(36px) saturate(200%);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow:
    0 10px 32px rgba(0, 0, 0, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.year-toolbar__label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-text-mute);
  margin-right: 4px;
}

.year-pill {
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-text-sub);
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
  transition: all 0.18s var(--ease);
  -webkit-tap-highlight-color: transparent;
}

.year-pill:hover {
  color: var(--c-text);
  border-color: rgba(0, 0, 0, 0.2);
}

.year-pill[aria-pressed="true"] {
  background: var(--c-text);
  color: #fff;
  border-color: var(--c-text);
}

/* ALL：更小的字距标签感 */
.year-pill--all {
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 5px 12px;
  margin-right: 2px;
}

.year-pill--all[aria-pressed="true"] {
  background: var(--c-text);
  color: #fff;
}

/* 工具条圆点分隔（YEAR 与首个 pill 之间更清爽） */
.year-toolbar__label::after {
  content: "";
}

.year-toolbar__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--c-text-mute);
  letter-spacing: 0.04em;
}

@media (max-width: 900px) {
  .year-toolbar {
    top: calc(var(--nav-gap) + 54px + var(--nav-gap));
    border-radius: 0;
  }
}

/* ============================================
   年份分组
   ============================================ */
.year-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--s5) var(--s3);
  border-top: 1px solid var(--c-line);
  transition: opacity 0.3s var(--ease);
}

.year-section.is-hidden {
  display: none;
}

.year-section.is-empty {
  display: none;
}

.year-label {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--c-text);
  margin-bottom: var(--s3);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.year-label__count {
  font-size: 12px;
  font-weight: 400;
  color: var(--c-text-mute);
  letter-spacing: 0.05em;
}

.year-section + .year-section {
  margin-top: 0;
}

/* ============================================
   瀑布流网格
   ============================================ */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s2);
}

.grid-item {
  position: relative;
  background: #f0f0f0;
  overflow: hidden;
  cursor: zoom-in;
  aspect-ratio: 4 / 5;
}

.grid-item.ratio-1-1 { aspect-ratio: 1 / 1; }
.grid-item.ratio-3-4 { aspect-ratio: 3 / 4; }
.grid-item.ratio-3-2 { aspect-ratio: 3 / 2; }
.grid-item.ratio-16-9 { aspect-ratio: 16 / 9; }
.grid-item.ratio-4-5 { aspect-ratio: 4 / 5; }

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s var(--ease), transform 0.6s var(--ease);
}

.grid-item img:not(.loaded) {
  opacity: 0;
}

.grid-item:hover img {
  transform: scale(1.02);
}

.grid-item__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 12px;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.55) 100%);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  pointer-events: none;
}

.grid-item:hover .grid-item__caption,
.grid-item:focus-visible .grid-item__caption {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   灯箱（Lightbox）
   ============================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.lightbox.is-open {
  display: flex;
  opacity: 1;
}

.lightbox__img {
  max-width: 92vw;
  max-height: 84vh;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  box-shadow: 0 12px 60px rgba(0,0,0,0.5);
}

.lightbox__caption {
  position: absolute;
  bottom: 24px;
  left: 0; right: 0;
  text-align: center;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 0 32px;
}

.lightbox__counter {
  position: absolute;
  top: 24px;
  left: 0; right: 0;
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.lightbox__btn {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  transition: background 0.2s var(--ease), transform 0.15s var(--ease);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 0;
  line-height: 1;
}

.lightbox__btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.lightbox__btn:active {
  transform: scale(0.94);
}

.lightbox__btn--close {
  top: 24px;
  right: 24px;
}

.lightbox__btn--prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__btn--next { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__btn--prev:active { transform: translateY(-50%) scale(0.94); }
.lightbox__btn--next:active { transform: translateY(-50%) scale(0.94); }

.lightbox__loading {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  letter-spacing: 0.1em;
}

body.lightbox-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .lightbox__btn--prev { left: 12px; }
  .lightbox__btn--next { right: 12px; }
  .lightbox__btn--close { top: 12px; right: 12px; }
}

/* ============================================
   页面顶头（内页用）—— Apple 大标题
   ============================================ */
.page-head {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(72px, 13vh, 132px) var(--s3) var(--s4);
}

.page-head__eyebrow {
  font-size: var(--t-foot);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-text-mute);
  margin-bottom: var(--s2);
}

.page-head__title {
  font-size: clamp(34px, 5.2vw, 54px);
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1.06;
}

.page-head__sub {
  font-size: var(--t-body);
  color: var(--c-text-sub);
  margin-top: var(--s3);
  max-width: 540px;
}

/* ============================================
   About —— Apple 风格：大字导语 + Liquid Glass 信息卡
   ============================================ */
.about {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 var(--s3) clamp(96px, 14vh, 160px);
}

/* 大字导语（Apple 产品页 lead 段落） */
.about__lead {
  max-width: 680px;
}

.about__lead p {
  font-size: clamp(18px, 2.1vw, 22px);
  line-height: 1.62;
  letter-spacing: -0.008em;
  color: var(--c-text);
}

.about__lead p + p {
  margin-top: var(--s3);
}

.about__lead-sub {
  color: var(--c-text-sub) !important;
}

/* 卡片栅格 */
.about__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(48px, 8vh, 88px);
}

@media (min-width: 1024px) {
  .about__cards {
    grid-template-columns: 1fr 1fr;
  }
  .glass-card--wide {
    grid-column: 1 / -1;
  }
}

/* Liquid Glass 卡片（与侧栏 / 年份条同配方） */
.glass-card {
  position: relative;
  padding: 26px 26px 24px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(36px) saturate(200%);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.08),
    0 2px 8px rgba(0, 0, 0, 0.03),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow:
    0 20px 56px rgba(0, 0, 0, 0.11),
    0 2px 8px rgba(0, 0, 0, 0.03),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.glass-card__eyebrow {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-text-mute);
}

.glass-card__title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.018em;
  margin-top: 6px;
}

/* 规格表（Apple tech specs 质感） */
.spec-list {
  list-style: none;
  margin-top: 18px;
}

.spec-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--c-line);
  font-size: 15px;
}

.spec-list li:first-child {
  border-top: none;
}

.spec-list__idx {
  flex: 0 0 22px;
  font-size: 12px;
  color: var(--c-text-mute);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.spec-list__v {
  color: var(--c-text);
}

/* 位置 */
.about__city {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.about__city-mark {
  font-size: 15px;
  color: var(--c-text-mute);
}

/* 社交胶囊 */
.social-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: -0.005em;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}

.social-pill::after {
  content: "↗";
  font-size: 11px;
  color: var(--c-text-mute);
  transition: color 0.2s var(--ease), transform 0.25s var(--ease);
}

.social-pill:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 8px 22px rgba(0, 0, 0, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.98);
}

.social-pill:hover::after {
  color: var(--c-text);
  transform: translate(1px, -1px);
}

@media (max-width: 900px) {
  .glass-card {
    padding: 22px 20px;
    border-radius: 18px;
  }
  .about__cards {
    gap: 14px;
  }
}

/* ============================================
   Contact
   ============================================ */
.contact {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--s5) var(--s3) var(--s6);
}

.contact-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--s2) 0;
  border-bottom: 1px solid var(--c-line);
  transition: padding 0.25s var(--ease);
}

.contact-row:hover {
  padding-left: var(--s2);
}

.contact-row__label {
  font-size: var(--t-meta);
  color: var(--c-text-mute);
  letter-spacing: 0.05em;
  width: 130px;
  flex-shrink: 0;
}

.contact-row__value {
  font-size: 17px;
  text-align: right;
  flex: 1;
  margin-left: var(--s3);
}

.contact-note {
  font-size: 14px;
  color: var(--c-text-sub);
  line-height: 1.7;
  text-align: center;
  margin: var(--s5) auto;
  max-width: 480px;
}

@media (max-width: 640px) {
  .contact-row { flex-direction: column; gap: 4px; }
  .contact-row__label { width: auto; }
  .contact-row__value { margin-left: 0; text-align: left; }
}

/* ============================================
   Journal
   ============================================ */
.journal {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--s3) var(--s7);
}

.journal-item {
  padding: var(--s3) 0;
  border-bottom: 1px solid var(--c-line);
}

.journal-item:last-child {
  border-bottom: 1px solid var(--c-line);
}

.journal-item time {
  display: block;
  font-size: var(--t-foot);
  letter-spacing: 0.15em;
  color: var(--c-text-mute);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.journal-item h3 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.005em;
  margin-bottom: 4px;
}

.journal-item p {
  font-size: var(--t-body);
  line-height: 1.65;
  color: var(--c-text-sub);
}

/* ============================================
   Series
   ============================================ */
.series-list {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s3) var(--s7);
}

.series-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s4);
  padding: var(--s5) 0;
  align-items: center;
  border-top: 1px solid var(--c-line);
}

.series-card.reverse {
  direction: rtl;
}

.series-card.reverse > * {
  direction: ltr;
}

.series-card__cover {
  width: 100%;
  background: #f0f0f0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.series-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.series-card:hover .series-card__cover img {
  transform: scale(1.03);
}

.series-card__info {
  padding: 0 var(--s3);
}

.series-card__year {
  font-size: var(--t-foot);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-text-mute);
  margin-bottom: var(--s1);
}

.series-card__title {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin-bottom: 4px;
}

.series-card__sub {
  font-size: 17px;
  color: var(--c-text);
  margin-bottom: var(--s2);
}

.series-card__desc {
  font-size: 14px;
  color: var(--c-text-sub);
  line-height: 1.65;
  margin-bottom: var(--s2);
}

.series-card__count {
  font-size: var(--t-foot);
  color: var(--c-text-mute);
  letter-spacing: 0.05em;
}

@media (max-width: 720px) {
  .series-card {
    grid-template-columns: 1fr;
    gap: var(--s3);
  }
  .series-card.reverse { direction: ltr; }
  .series-card__info { padding: 0; }
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  border-top: 1px solid var(--c-line);
  padding: var(--s4) var(--s3);
}

.footer-row {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s2);
  font-size: var(--t-foot);
  color: var(--c-text-mute);
  letter-spacing: 0.02em;
}

/* ============================================
   空态/加载
   ============================================ */
.loading,
.empty {
  max-width: 480px;
  margin: var(--s6) auto;
  text-align: center;
  font-size: 14px;
  color: var(--c-text-mute);
}

/* ============================================
   滚动渐入
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================
   减少动效
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .grid-item:hover img,
  .series-card:hover .series-card__cover img { transform: none; }
}

/* ============================================
   Print
   ============================================ */
@media print {
  .site-header, .site-footer, .year-toolbar, .lightbox { display: none; }
  body { color: #000; background: #fff; padding-left: 0; }
}