/* ==========================================================
   爱柯森装饰 · 官网样式
   设计语言：大图叙事 / 编辑式排版 / 克制的金属色点缀
   ========================================================== */
:root {
  --bone: #f7f4ef;
  --bone-2: #efeae1;
  --paper: #ffffff;
  --ink: #16140f;
  --muted: #837b6c;
  --line: #e3ddd1;
  --brass: #a98a55;
  --brass-dark: #8a6f42;
  --dark: #131110;
  --dark-2: #1d1a16;
  --shadow-sm: 0 2px 14px rgba(22, 20, 15, 0.05);
  --shadow-md: 0 18px 50px rgba(22, 20, 15, 0.12);
  --serif: Georgia, "Times New Roman", "Songti SC", "Noto Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(.22, .68, .16, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--bone);
  color: var(--ink);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
.container { width: 100%; max-width: 1260px; margin: 0 auto; padding: 0 32px; }
.eyebrow {
  font-size: 11px; letter-spacing: .34em; text-transform: uppercase;
  color: var(--brass); font-weight: 500;
}
.eyebrow--light { color: #c8ab7c; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  transition: background .45s var(--ease), border-color .45s var(--ease), color .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 86px; transition: height .35s var(--ease); }
.brand { display: inline-flex; flex-direction: column; gap: 4px; }
.brand__name { font-family: var(--serif); font-size: 20px; letter-spacing: .18em; text-transform: uppercase; margin-right: -.18em; }
.brand__zh { display: flex; justify-content: space-between; font-size: 11.5px; opacity: .72; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a {
  font-size: 13.5px; letter-spacing: .12em; opacity: .78;
  position: relative; padding: 4px 0; transition: opacity .25s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: currentColor; transition: right .35s var(--ease);
}
.nav-links a:hover { opacity: 1; }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.lang-btn {
  background: none; border: 1px solid currentColor; border-radius: 999px;
  padding: 4px 14px; font-size: 12px; letter-spacing: .14em; cursor: pointer;
  opacity: .8; transition: opacity .25s, background .25s;
}
.lang-btn:hover { opacity: 1; }
.nav-toggle { display: none; background: none; border: 0; color: inherit; font-size: 22px; cursor: pointer; }
/* 首页：叠加在首屏图上，滚动后变为浅色 */
.nav--over { color: #f7f3ea; }
.nav--over.scrolled { background: rgba(247, 244, 239, .94); backdrop-filter: blur(14px); color: var(--ink); border-bottom-color: var(--line); }
.nav--over.scrolled .nav__inner { height: 68px; }
/* 内页：始终浅色 */
.nav--solid { background: rgba(247, 244, 239, .95); backdrop-filter: blur(14px); color: var(--ink); border-bottom-color: var(--line); }
.nav--solid .nav__inner { height: 68px; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 94vh; display: flex; align-items: center;
  background: #14120e center/cover no-repeat; color: #f8f4ec; overflow: hidden;
}
.hero__veil {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(12,11,9,.58) 0%, rgba(12,11,9,.26) 44%, rgba(12,11,9,.66) 100%);
}
.hero__inner { position: relative; z-index: 1; width: 100%; padding: 156px 0 96px; }
.hero__label { margin-bottom: 26px; }
.hero h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(38px, 6.2vw, 80px); line-height: 1.15; letter-spacing: .01em; max-width: 17em;
}
.hero p {
  margin-top: 26px; max-width: 34em; font-size: clamp(14px, 1.5vw, 17px);
  color: rgba(248, 244, 236, .82); letter-spacing: .04em;
}
.hero__cta { margin-top: 46px; display: flex; gap: 18px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 15px 34px;
  font-size: 13.5px; letter-spacing: .16em; border: 1px solid transparent;
  cursor: pointer; transition: all .3s var(--ease); background: none; color: inherit;
}
.btn--solid { background: var(--brass); color: #fff; border-color: var(--brass); }
.btn--solid:hover { background: var(--brass-dark); border-color: var(--brass-dark); }
.btn--outline { border-color: rgba(248, 244, 236, .5); color: #f8f4ec; }
.btn--outline:hover { background: rgba(248, 244, 236, .12); border-color: rgba(248, 244, 236, .85); }
.btn--dark { background: var(--ink); color: #f8f4ec; border-color: var(--ink); }
.btn--dark:hover { background: #000; }
.btn--line { border-color: var(--line); color: var(--ink); }
.btn--line:hover { border-color: var(--ink); }
.hero__scroll {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%); z-index: 1;
  font-size: 10.5px; letter-spacing: .3em; color: rgba(248,244,236,.6);
}
.hero__scroll::after {
  content: ""; display: block; width: 1px; height: 46px; margin: 12px auto 0;
  background: linear-gradient(180deg, rgba(248,244,236,.65), transparent);
}

/* ---------- 信息条 ---------- */
.marquee { background: var(--dark); color: rgba(248,244,236,.68); }
.marquee__inner {
  display: flex; flex-wrap: wrap; gap: 10px 40px; justify-content: center;
  padding: 16px 32px; font-size: 11.5px; letter-spacing: .26em; text-transform: uppercase;
}

/* ---------- 段落通用 ---------- */
.section { padding: 118px 0; }
.section--paper { background: var(--paper); }
.section--dark { background: var(--dark); color: #f3efe7; }
.sec-head { max-width: 760px; margin-bottom: 68px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-title {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(28px, 3.6vw, 46px); line-height: 1.25; margin-top: 18px;
}
.sec-sub { color: var(--muted); margin-top: 16px; max-width: 46em; }
.section--dark .sec-sub { color: rgba(243, 239, 231, .68); }

/* ---------- 业务版块 ---------- */
.services { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.service {
  padding: 46px 40px 52px; border-right: 1px solid var(--line);
  transition: background .4s var(--ease);
}
.service:last-child { border-right: 0; }
.service:hover { background: var(--paper); }
.service__no { font-family: var(--serif); font-size: 13px; letter-spacing: .2em; color: var(--brass); }
.service h3 { font-family: var(--serif); font-weight: 400; font-size: 25px; margin: 20px 0 14px; }
.service p { color: var(--muted); font-size: 14.5px; }

/* ---------- 作品网格 ---------- */
.works { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px 26px; }
.work { cursor: pointer; }
.work__img { position: relative; overflow: hidden; background: var(--bone-2); }
.work__img img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; transition: transform 1.1s var(--ease); }
.work:hover .work__img img { transform: scale(1.055); }
.work__tag {
  position: absolute; top: 16px; left: 16px; background: rgba(255,255,255,.93); color: var(--ink);
  font-size: 10.5px; letter-spacing: .16em; padding: 5px 11px; text-transform: uppercase;
}
.work__body { padding-top: 18px; display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.work__title { font-family: var(--serif); font-size: 18px; line-height: 1.45; }
.work__meta { font-size: 11.5px; letter-spacing: .16em; color: var(--muted); white-space: nowrap; }
.works-more { margin-top: 66px; text-align: center; }

/* ---------- 关于 ---------- */
.about { display: grid; grid-template-columns: 0.92fr 1fr; gap: 84px; align-items: center; }
.about__figure { position: relative; }
.about__figure img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.about__text h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(26px, 3vw, 38px); margin: 18px 0 22px; line-height: 1.3; }
.about__text p { color: var(--muted); margin-bottom: 16px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; margin-top: 54px; padding-top: 34px; border-top: 1px solid var(--line); }
.stat__num { font-family: var(--serif); font-size: 34px; line-height: 1; }
.stat__label { font-size: 11.5px; letter-spacing: .16em; color: var(--muted); margin-top: 12px; text-transform: uppercase; }
.section--dark .stats { border-top-color: rgba(243,239,231,.16); }
.section--dark .stat__num { color: #f3efe7; }
.section--dark .stat__label { color: rgba(243,239,231,.6); }

/* ---------- 联系 ---------- */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 84px; }
.contact__row { display: grid; grid-template-columns: 140px 1fr; gap: 20px; padding: 24px 0; border-top: 1px solid rgba(243,239,231,.16); }
.contact__row dt { font-size: 11.5px; letter-spacing: .2em; color: #c8ab7c; text-transform: uppercase; padding-top: 3px; }
.contact__row dd { font-size: 15px; color: rgba(243,239,231,.9); }
.contact__cta { align-self: center; }

/* ---------- 页脚 ---------- */
.footer { background: #0e0c0a; color: rgba(243,239,231,.5); padding: 40px 0; font-size: 12.5px; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer a { color: rgba(243,239,231,.72); }
.footer a:hover { color: #fff; }
.footer__links { display: flex; gap: 26px; }

/* ---------- 案例页 ---------- */
.page-head { padding: 168px 0 56px; border-bottom: 1px solid var(--line); }
.page-head h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(32px, 4.6vw, 56px); margin-top: 18px; line-height: 1.2; }
.filters { display: flex; gap: 34px; flex-wrap: wrap; padding-top: 34px; }
.filter {
  background: none; border: 0; cursor: pointer; padding: 0 0 8px; font-size: 13.5px;
  letter-spacing: .14em; color: var(--muted); position: relative; transition: color .3s;
}
.filter::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--ink); transition: right .35s var(--ease); }
.filter:hover { color: var(--ink); }
.filter.active { color: var(--ink); }
.filter.active::after { right: 0; }
.cases-body { padding: 64px 0 110px; }
.empty-hint { color: var(--muted); padding: 60px 0; text-align: center; grid-column: 1 / -1; }
.load-more-wrap { margin-top: 76px; text-align: center; }
#loadMoreBtn {
  background: none; border: 1px solid var(--line); padding: 14px 44px; font-size: 12.5px;
  letter-spacing: .2em; cursor: pointer; color: var(--ink); transition: all .3s var(--ease);
}
#loadMoreBtn:hover:not(:disabled) { border-color: var(--ink); }
#loadMoreBtn:disabled { opacity: .55; cursor: wait; }

/* ---------- 案例弹层 ---------- */
.lightbox { position: fixed; inset: 0; z-index: 120; display: none; }
.lightbox.open { display: block; }
.lightbox__backdrop { position: absolute; inset: 0; background: rgba(10, 9, 7, .82); backdrop-filter: blur(6px); }
.lightbox__panel {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: min(1120px, 94vw); height: min(700px, 88vh); background: var(--paper);
  display: flex; overflow: hidden; box-shadow: 0 40px 100px rgba(0,0,0,.5);
}
.lightbox__close {
  position: absolute; top: 10px; right: 12px; z-index: 6; width: 42px; height: 42px;
  border: 0; background: none; font-size: 26px; line-height: 1; cursor: pointer; color: var(--ink);
  opacity: .55; transition: opacity .25s;
}
.lightbox__close:hover { opacity: 1; }
.lightbox__viewer { flex: 1; background: #0f0d0a; position: relative; display: flex; align-items: center; justify-content: center; min-width: 0; }
.lightbox__img { max-width: 100%; max-height: 100%; object-fit: contain; }
.lightbox__nav {
  position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px;
  border: 1px solid rgba(255,255,255,.28); background: rgba(0,0,0,.22); color: #fff;
  font-size: 20px; cursor: pointer; transition: background .25s;
}
.lightbox__nav:hover { background: rgba(255,255,255,.16); }
.lightbox__nav--prev { left: 16px; }
.lightbox__nav--next { right: 16px; }
.lightbox__counter {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
  font-size: 11.5px; letter-spacing: .18em; color: rgba(255,255,255,.8);
}
.lightbox__info { width: 372px; flex-shrink: 0; border-left: 1px solid var(--line); padding: 40px 32px; overflow-y: auto; }
.lightbox__title { font-family: var(--serif); font-weight: 400; font-size: 24px; line-height: 1.42; margin: 18px 0 8px; }
.lightbox__date { font-size: 11.5px; letter-spacing: .16em; color: var(--muted); }
.lightbox__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tag { font-size: 12px; color: var(--brass-dark); border: 1px solid var(--line); padding: 4px 11px; }
.lightbox__desc { margin-top: 22px; color: var(--muted); font-size: 14.5px; white-space: pre-wrap; }
.lightbox__thumbs-title { margin-top: 30px; font-size: 11.5px; letter-spacing: .18em; color: var(--muted); text-transform: uppercase; }
.lightbox__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.lightbox__thumbs img { width: 100%; aspect-ratio: 1; object-fit: cover; cursor: pointer; opacity: .55; transition: opacity .25s; }
.lightbox__thumbs img.active, .lightbox__thumbs img:hover { opacity: 1; }
.badge { font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--brass-dark); }

/* ---------- 滚动进入动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 后台 ---------- */
.admin-body { background: var(--bone-2); min-height: 100vh; }
.admin-wrap { max-width: 1120px; margin: 0 auto; padding: 46px 22px 90px; }
.login-card { max-width: 420px; margin: 9vh auto 0; background: var(--paper); padding: 52px 42px; box-shadow: var(--shadow-md); text-align: center; }
.login-card h2 { font-family: var(--serif); font-weight: 400; font-size: 26px; }
.login-card .sub { color: var(--muted); font-size: 13px; margin: 10px 0 30px; letter-spacing: .1em; }
.field { text-align: left; margin-bottom: 18px; }
.field label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 7px; letter-spacing: .08em; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 12px 14px; font-size: 14.5px; font-family: inherit; outline: none; transition: border-color .25s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--brass); }
.field textarea { min-height: 120px; resize: vertical; line-height: 1.7; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .field { flex: 1; min-width: 190px; }
.btn--full { width: 100%; justify-content: center; }
.btn--small { padding: 10px 20px; font-size: 12px; letter-spacing: .12em; }
.btn--danger { background: #a4443c; border-color: #a4443c; color: #fff; }
.btn--danger:hover { background: #8d3830; border-color: #8d3830; }
.admin-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; flex-wrap: wrap; margin-bottom: 30px; }
.admin-head h2 { font-family: var(--serif); font-weight: 400; font-size: 30px; }
.admin-tabs { display: flex; gap: 30px; margin-bottom: 26px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.admin-tab { background: none; border: 0; cursor: pointer; padding: 0 0 12px; font-size: 14px; letter-spacing: .1em; color: var(--muted); position: relative; }
.admin-tab::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -1px; height: 1px; background: var(--ink); transition: right .3s var(--ease); }
.admin-tab.active { color: var(--ink); }
.admin-tab.active::after { right: 0; }
.admin-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.panel { background: var(--paper); padding: 30px; box-shadow: var(--shadow-sm); margin-bottom: 24px; }
.panel > h3 { font-family: var(--serif); font-weight: 400; font-size: 20px; }
.panel__hint { color: var(--muted); font-size: 12.5px; margin: 6px 0 22px; }
.panel__group { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 28px; }
.panel__group:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.panel__group h4 { font-size: 12.5px; letter-spacing: .16em; color: var(--brass-dark); text-transform: uppercase; margin-bottom: 18px; }
.case-row { display: flex; align-items: center; gap: 16px; padding: 15px 2px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.case-row:last-child { border-bottom: 0; }
.case-row img { width: 72px; height: 72px; object-fit: cover; flex-shrink: 0; background: var(--bone-2); }
.case-row__main { min-width: 200px; flex: 1; }
.case-row__title { font-size: 15px; font-weight: 600; }
.case-row__meta { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.case-row__ops { display: flex; gap: 8px; flex-wrap: wrap; }
.case-row__ops button { background: #fff; border: 1px solid var(--line); padding: 7px 14px; font-size: 12.5px; cursor: pointer; transition: all .25s; }
.case-row__ops button:hover { border-color: var(--ink); }
.case-row__ops .del:hover { border-color: #a4443c; color: #a4443c; }
.upload-box { border: 1px dashed var(--line); padding: 18px; text-align: center; font-size: 13px; color: var(--muted); background: #fbf9f6; }
.upload-box input[type=file] { display: none; }
.upload-box label { color: var(--brass-dark); cursor: pointer; border-bottom: 1px solid var(--brass); }
.upload-preview { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.upload-preview .pv { position: relative; width: 76px; height: 76px; overflow: hidden; background: var(--bone-2); }
.upload-preview .pv img { width: 100%; height: 100%; object-fit: cover; }
.upload-preview .pv .rm { position: absolute; top: 0; right: 0; width: 20px; height: 20px; border: 0; background: rgba(0,0,0,.6); color: #fff; font-size: 12px; line-height: 1; cursor: pointer; }
.check-row { display: flex; align-items: center; gap: 10px; font-size: 14px; margin-bottom: 18px; }
.check-row input { width: auto; }
.msg { margin-top: 14px; font-size: 13.5px; min-height: 20px; }
.msg.err { color: #a4443c; }
.msg.ok { color: #3f6b46; }
.admin-foot { text-align: center; margin-top: 36px; font-size: 13px; color: var(--muted); }
.admin-foot a:hover { color: var(--brass-dark); }
.stat-row { display: flex; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.stat-row .field { margin-bottom: 0; flex: 1; min-width: 120px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .works { grid-template-columns: repeat(2, 1fr); }
  .services { grid-template-columns: repeat(2, 1fr); }
  .service { border-bottom: 1px solid var(--line); }
  .service:nth-child(2n) { border-right: 0; }
  .service:nth-child(n+3) { border-bottom: 0; }
  .about, .contact { grid-template-columns: 1fr; gap: 56px; }
  .about__figure img { aspect-ratio: 4 / 3; }
}
@media (max-width: 860px) {
  .container { padding: 0 22px; }
  .section { padding: 82px 0; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .lightbox__panel { flex-direction: column; height: 92vh; width: 95vw; }
  .lightbox__viewer { min-height: 44vh; }
  .lightbox__info { width: 100%; border-left: 0; border-top: 1px solid var(--line); flex: 1; padding: 26px 22px; }
  .page-head { padding: 128px 0 44px; }
  /* 手机端首屏：高度收窄约 1/4，下滑即可看到业务信息条 */
  .hero { min-height: 70vh; }
  .hero__inner { padding: 112px 0 64px; }
  .hero__cta { margin-top: 34px; }
  .hero p { margin-top: 20px; }
  .hero__scroll { display: none; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column;
    gap: 0; background: rgba(247,244,239,.98); color: var(--ink);
    border-bottom: 1px solid var(--line); padding: 6px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 15px 22px; width: 100%; opacity: .9; }
  .nav-links .lang-btn { margin: 12px 22px 18px; align-self: flex-start; }
  .works { grid-template-columns: 1fr; gap: 34px; }
  .services { grid-template-columns: 1fr; }
  .service { border-right: 0; border-bottom: 1px solid var(--line); }
  .service:last-child { border-bottom: 0; }
  .contact__row { grid-template-columns: 1fr; gap: 6px; }
  .case-row__ops { width: 100%; }
}