/* ============================================================
   Digital Lookbook — editorial stylesheet
   调色板与字体刻意贴合时装刊物语言：
   纸白 + 墨黑 + 唇膏红一处点睛；Didot/Bodoni 报头（系统自带，
   不依赖任何外部字体 CDN —— 保证中国大陆加载稳定）
   ============================================================ */

:root {
  --paper: #FAFAF8;        /* 铜版纸白 */
  --ink: #121212;          /* 墨黑 */
  --lipstick: #C11119;     /* 唯一强调色 */
  --grey: #6E6A64;         /* 图注灰 */
  --hairline: #E5E2DC;     /* 发丝分隔线 */

  --font-display: "Didot", "Bodoni MT", "Bodoni 72", "Playfair Display",
                  "Songti SC", "STSong", Georgia, serif;
  --font-body: "Helvetica Neue", Helvetica, "PingFang SC",
               "Microsoft YaHei", Arial, sans-serif;

  --plate-max: 980px;      /* 作品页最大宽度 */
  --text-max: 640px;       /* 文本栏最大宽度 */
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--lipstick); color: #fff; }

:focus-visible {
  outline: 2px solid var(--lipstick);
  outline-offset: 3px;
}

/* ---------- 书脊页码轨（签名元素） ---------- */
.spine {
  position: fixed;
  left: 0; top: 0;
  height: 100vh;
  width: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  border-right: 1px solid var(--hairline);
  background: var(--paper);
  z-index: 20;
  font-size: 11px;
  letter-spacing: 0.18em;
}
.spine-label {
  writing-mode: vertical-rl;
  color: var(--grey);
}
.spine-page {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--lipstick);
  letter-spacing: 0.06em;
}
.spine-total { color: var(--grey); }

/* 页面主体整体让出书脊宽度 */
.masthead, .intro, .plates, .about, .contact, .footer {
  margin-left: 56px;
}

/* ---------- ① 报头 ---------- */
.masthead {
  padding: 15vh 6vw 9vh;
  border-bottom: 1px solid var(--ink);
}
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--lipstick);
  margin-bottom: 2.2rem;
}
.masthead-name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3.2rem, 11vw, 8.5rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  overflow: hidden;
}
/* 报头字符逐一上升入场（由 JS 拆分为 span） */
.masthead-name .ch {
  display: inline-block;
  transform: translateY(110%);
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes rise { to { transform: translateY(0); } }

.masthead-tagline {
  margin-top: 1.6rem;
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
}
.masthead-rule {
  margin-top: 3.5rem;
  height: 1px;
  background: var(--hairline);
}
.masthead-meta {
  display: flex;
  justify-content: space-between;
  padding-top: 0.9rem;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.masthead-meta span:last-child { color: var(--grey); }

/* ---------- ② 项目引言 ---------- */
.intro {
  padding: 9vh 6vw;
  max-width: calc(var(--text-max) + 12vw);
}
.intro-sub {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-style: italic;
  margin-bottom: 1.2rem;
}
.intro-desc {
  max-width: var(--text-max);
  color: var(--grey);
}

/* ---------- ③ 作品逐页 ---------- */
.plates {
  display: flex;
  flex-direction: column;
  gap: 8vh;
  padding: 4vh 6vw 12vh;
  align-items: center;
}
.plate {
  width: 100%;
  max-width: var(--plate-max);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.plate.in {
  opacity: 1;
  transform: none;
}
.plate button {
  display: block;
  width: 100%;
  border: none;
  background: none;
  padding: 0;
  cursor: zoom-in;
}
.plate img {
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05), 0 12px 40px rgba(0,0,0,0.07);
}
.plate figcaption {
  display: flex;
  justify-content: space-between;
  margin-top: 0.7rem;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--grey);
  text-transform: uppercase;
}
.plate figcaption .no { color: var(--lipstick); }

/* ---------- ④⑤ About / Contact ---------- */
.about, .contact {
  padding: 8vh 6vw;
  border-top: 1px solid var(--hairline);
}
.section-label {
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--lipstick);
  margin-bottom: 1.6rem;
}
.about-text {
  max-width: var(--text-max);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  line-height: 1.75;
}
.contact-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 2.4rem;
}
.contact-list a, .contact-list span {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.contact-list a:hover {
  color: var(--lipstick);
  border-color: var(--lipstick);
}
.contact-list .k {
  color: var(--grey);
  border: none;
  margin-right: 0.5rem;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 4vh 6vw 6vh;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  color: var(--grey);
  letter-spacing: 0.08em;
}

/* ---------- 灯箱 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(12,12,12,0.94);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox[hidden] { display: none; }
.lb-img {
  max-width: 88vw;
  max-height: 88vh;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}
.lb-close, .lb-nav {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  font-family: var(--font-display);
  line-height: 1;
  padding: 12px;
}
.lb-close { top: 18px; right: 26px; font-size: 34px; }
.lb-nav { top: 50%; transform: translateY(-50%); font-size: 48px; }
.lb-prev { left: 18px; }
.lb-next { right: 18px; }
.lb-caption {
  position: absolute;
  bottom: 22px;
  left: 0; right: 0;
  text-align: center;
  color: rgba(255,255,255,0.75);
  font-size: 12px;
  letter-spacing: 0.2em;
}

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .spine {
    width: 100%;
    height: 44px;
    flex-direction: row;
    padding: 0 18px;
    border-right: none;
    border-bottom: 1px solid var(--hairline);
  }
  .spine-label { writing-mode: horizontal-tb; }
  .masthead, .intro, .plates, .about, .contact, .footer { margin-left: 0; }
  .masthead { padding-top: 16vh; }
  .lb-nav { font-size: 36px; }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .masthead-name .ch { animation: none; transform: none; }
  .plate { opacity: 1; transform: none; transition: none; }
}