/* LOWHEARTH 洛赫 官网 · 品牌样式
   静奢 Quiet Luxury：大量留白、克制、高级感
   配色（2026 结案版）：#1c1c1c 炭黑 / #f4f3f0 暖象牙 / #b39257 炉火金 */

:root {
  --black: #1c1c1c;
  --ink: #1a1a1b;
  --cream: #f4f3f0;
  --cream-light: #faf9f7;
  --copper: #b39257;
  --copper-dark: #94794a;
  --grey: #6b6b6f;
  --white: #ffffff;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  color: var(--ink);
  background: var(--cream-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 中文排版：防单字掉头（孤字成行） */
h1, h2, h3, .big-line, .model, .cap, .tag, .section-title, .pillars h3, .dual-entry h3, .detail-hero .title h1 {
  text-wrap: balance;
}
p, .lead, .sub, .pillars p, .dual-entry p, .spec-grid, .footer .slogan, .product-entry .info p {
  text-wrap: pretty;
}

.en {
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.06em;
}

/* 顶部导航 */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: rgba(28, 28, 28, 0.85);
  backdrop-filter: blur(12px);
  color: var(--cream);
}
.nav .brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.12em;
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav .brand .zh { font-weight: 600; }
.nav .brand .divider { color: var(--copper); font-weight: 300; }
.nav .brand, .footer .brand { text-decoration: none; }
.nav .brand img { height: 30px; width: auto; display: block; }
.footer .brand img { height: 26px; width: auto; display: block; }
.brand { transition: opacity 0.2s ease; }
.brand:hover { opacity: 0.82; }
.nav .links { display: flex; gap: 32px; }
.nav .links a {
  color: var(--cream);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  opacity: 0.85;
  transition: opacity 0.2s, color 0.2s;
}
.nav .links a:hover { opacity: 1; color: var(--copper); }

/* Hero */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  text-align: left;
  color: var(--white);
  overflow: hidden;
}
.hero img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.55);
}
.hero .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(28,28,28,0.35), rgba(28,28,28,0.75));
}
.hero .content {
  position: relative;
  z-index: 2;
  padding: 0 clamp(28px, 7vw, 110px);
  max-width: 620px;
}
.hero .kicker {
  font-size: 14px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 4.6vw, 58px);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.25;
  margin-bottom: 24px;
  text-wrap: balance;
}
.hero .sub {
  font-size: 18px;
  font-weight: 300;
  opacity: 0.9;
  max-width: 520px;
  margin: 0 0 40px;
}
.btn {
  display: inline-block;
  padding: 16px 44px;
  border: 1px solid var(--copper);
  color: var(--white);
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 0.1em;
  transition: background 0.25s, color 0.25s;
}
.btn:hover { background: var(--copper); color: var(--black); }
.btn.solid { background: var(--copper); color: var(--black); }
.btn.solid:hover { background: var(--copper-dark); border-color: var(--copper-dark); }

/* 通用区块 */
.section { padding: 96px 48px; max-width: 1200px; margin: 0 auto; }
.section.tight { padding: 72px 48px; }
.section.dark { background: var(--black); color: var(--cream); max-width: none; }
.section.dark .inner { max-width: 1200px; margin: 0 auto; }

.section-title {
  font-size: 13px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 16px;
}
.section h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}
.section .lead {
  font-size: 17px;
  color: var(--grey);
  max-width: 720px;
  font-weight: 300;
}
.section.dark .lead { color: #a8a8ad; }

/* 品牌定位 */
.positioning {
  text-align: center;
  background: var(--white);
}
.positioning .big-line {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 300;
  letter-spacing: 0.04em;
  line-height: 1.6;
  max-width: 900px;
  margin: 0 auto;
}
.positioning .big-line em {
  font-style: normal;
  color: var(--copper);
}

/* 品牌释义 */
.brand-meaning {
  margin-top: 72px;
  text-align: left;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}
.meaning-lead {
  font-size: 20px;
  font-weight: 300;
  letter-spacing: 0.03em;
  line-height: 1.7;
  text-align: center;
  margin-bottom: 56px;
}
.nobreak { white-space: nowrap; }
.meaning-lead strong {
  font-weight: 500;
  color: var(--copper);
}
.meaning-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  margin-bottom: 56px;
}
.meaning-item h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper);
  margin-bottom: 14px;
}
.meaning-item p {
  font-size: 15px;
  color: var(--grey);
  font-weight: 300;
  line-height: 1.85;
}
.meaning-list {
  list-style: none;
}
.meaning-list li {
  font-size: 15px;
  color: var(--grey);
  font-weight: 300;
  line-height: 1.85;
}
.meaning-list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--copper);
  margin-right: 12px;
  vertical-align: middle;
}
.meaning-flow p {
  font-size: 16px;
  font-weight: 300;
  color: var(--ink);
  line-height: 1.95;
  margin-bottom: 20px;
}
.meaning-flow p:last-child { margin-bottom: 0; }
.meaning-final {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 300;
  letter-spacing: 0.14em;
  text-align: center;
  color: var(--copper);
  margin-top: 56px;
  text-wrap: balance;
}

/* 三柱优势 */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
}
.pillars .num {
  font-size: 42px;
  font-weight: 200;
  color: var(--copper);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.pillars h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.pillars p { font-size: 15px; color: var(--grey); font-weight: 300; }

/* 产品入口 */
.product-entry {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.product-entry img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  box-shadow: 0 30px 60px rgba(0,0,0,0.12);
}
.product-entry .info h3 {
  font-size: 30px;
  font-weight: 400;
  margin-bottom: 8px;
}
.product-entry .info .model {
  color: var(--copper);
  letter-spacing: 0.15em;
  font-size: 14px;
  margin-bottom: 20px;
}
.product-entry .info p {
  color: var(--grey);
  font-weight: 300;
  margin-bottom: 28px;
}
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
  margin-bottom: 28px;
  font-size: 14px;
}
.spec-grid .k { color: var(--grey); }
.spec-grid .v { text-align: right; font-weight: 600; }

/* 生活方式 */
.lifestyle { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.lifestyle .card { position: relative; overflow: hidden; }
.lifestyle .card img {
  width: 100%; height: 480px; object-fit: cover;
  transition: transform 0.6s ease;
}
.lifestyle .card:hover img { transform: scale(1.04); }
.lifestyle .card .cap {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 48px 28px 24px;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: var(--white);
  font-size: 16px;
  letter-spacing: 0.06em;
}

/* 双入口 */
.dual-entry { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.dual-entry a {
  display: block;
  padding: 48px;
  border: 1px solid rgba(179,146,87,0.35);
  text-decoration: none;
  color: var(--cream);
  transition: background 0.25s;
}
.dual-entry a:hover { background: rgba(179,146,87,0.08); }
.dual-entry .tag {
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 12px;
}
.dual-entry h3 { font-size: 24px; font-weight: 300; margin-bottom: 12px; }
.dual-entry p { font-size: 14px; color: #a8a8ad; font-weight: 300; }

/* 页脚 */
.footer {
  background: var(--black);
  color: var(--cream);
  padding: 64px 48px;
}
.footer .inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.footer .brand { font-size: 18px; letter-spacing: 0.12em; font-weight: 700; }
.footer .slogan { font-size: 13px; color: #8a8a8f; letter-spacing: 0.05em; }
.footer .copy { font-size: 12px; color: #5a5a5f; }

/* 产品详情页 */
.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 140px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
}
.detail-hero img {
  width: 100%;
  background: var(--white);
  box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}
.detail-hero .title h1 { font-size: 40px; font-weight: 300; }
.detail-hero .title .model { color: var(--copper); letter-spacing: 0.15em; margin: 8px 0 20px; }

table.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
table.spec th, table.spec td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid #e6e0d8;
}
table.spec th { width: 40%; color: var(--grey); font-weight: 400; }
table.spec td { font-weight: 600; }

/* 图文模块 */
.media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.media-row img { width: 100%; box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
.media-row.flip { direction: rtl; }
.media-row.flip > * { direction: ltr; }

/* 指南：三章入口 */
.guide-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.guide-cards a {
  display: block;
  padding: 40px 32px;
  background: var(--white);
  border: 1px solid #e6e0d8;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.25s, transform 0.25s;
}
.guide-cards a:hover { border-color: var(--copper); transform: translateY(-3px); }
.guide-cards .num { font-size: 12px; letter-spacing: 0.28em; color: var(--copper); margin-bottom: 16px; }
.guide-cards h3 { font-size: 22px; font-weight: 400; margin-bottom: 10px; }
.guide-cards p { font-size: 14px; color: var(--grey); font-weight: 300; line-height: 1.8; }

/* 指南：问答折叠 */
.qa { border-top: 1px solid #e6e0d8; max-width: 900px; }
.qa details { border-bottom: 1px solid #e6e0d8; }
.qa summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 22px 44px 22px 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+";
  position: absolute;
  right: 10px; top: 50%;
  transform: translateY(-50%);
  color: var(--copper);
  font-size: 22px;
  font-weight: 300;
}
.qa details[open] summary::after { content: "–"; }
.qa .qno { color: var(--copper); font-size: 12px; letter-spacing: 0.2em; margin-right: 14px; vertical-align: 2px; }
.qa .a { padding: 0 0 26px; font-size: 15px; color: var(--grey); font-weight: 300; line-height: 1.95; }
.qa .a p { margin-bottom: 10px; }
.qa .a p:last-child { margin-bottom: 0; }
.qa .a ol, .qa .a ul { margin: 0 0 10px 20px; }
.qa .a li { margin-bottom: 8px; }
.note { max-width: 900px; margin-top: 32px; padding: 18px 22px; background: #f0ece4; font-size: 13px; color: var(--grey); font-weight: 300; }
.guide-back { margin-top: 44px; }

/* 指南：自查表 */
.check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 48px; margin-top: 40px; }
.check .sym { font-size: 16px; font-weight: 600; color: var(--copper); margin-bottom: 8px; }
.check .fix { font-size: 14px; color: #a8a8ad; font-weight: 300; line-height: 1.85; }

/* 首页三入口 */
.dual-entry.three { grid-template-columns: repeat(3, 1fr); }

/* 产品线总览 */
.cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; margin-top: 36px; }
.cat-grid.three { grid-template-columns: repeat(3, 1fr); gap: 0 40px; }
.cat { border-top: 1px solid #e6e0d8; padding: 28px 0 30px; }
.cat .num { font-size: 12px; letter-spacing: 0.28em; color: var(--copper); margin-bottom: 10px; }
.cat h3 { font-size: 20px; font-weight: 400; margin-bottom: 8px; }
.cat .sub { font-size: 12px; letter-spacing: 0.08em; color: var(--copper); margin-bottom: 12px; }
.cat p { font-size: 14px; color: var(--grey); font-weight: 300; line-height: 1.9; }
.spec-grid.wide { max-width: 960px; font-size: 15px; gap: 14px 40px; }
.section.dark .spec-grid .k { color: #8f8f95; }
.section.dark .spec-grid .v { color: var(--cream); }

/* 响应式 */
@media (max-width: 860px) {
  .nav { padding: 14px 20px; }
  .nav .brand img { height: 20px; }
  .nav .links { gap: 16px; }
  .nav .links a { white-space: nowrap; }
  .section, .section.tight { padding: 64px 24px; }
  .pillars { grid-template-columns: 1fr; gap: 40px; }
  .guide-cards { grid-template-columns: 1fr; gap: 16px; }
  .guide-cards a { padding: 28px 24px; }
  .check-list { grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
  .qa summary { font-size: 16px; padding: 18px 36px 18px 0; }
  .qa .qno { display: none; }
  .product-entry, .lifestyle, .dual-entry, .detail-hero, .media-row { grid-template-columns: 1fr; }
  .dual-entry.three { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; gap: 0; margin-top: 24px; }
  .cat-grid.three { grid-template-columns: 1fr; }
  .detail-hero { padding: 120px 24px 60px; }
  .hero { min-height: 0; height: auto; padding: 140px 0 80px; }
  .hero .content { padding: 0 24px; max-width: 100%; }
  .hero h1 { font-size: clamp(26px, 7.5vw, 40px); }
  .hero .sub { font-size: 15px; max-width: 100%; margin-bottom: 32px; }
  .big-line { font-size: clamp(19px, 5vw, 26px); }
  .brand-meaning { margin-top: 48px; }
  .meaning-lead { font-size: 17px; margin-bottom: 40px; }
  .meaning-grid { grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; }
  .meaning-final { margin-top: 40px; }
  .btn { padding: 14px 32px; font-size: 14px; letter-spacing: 0.06em; }
  .footer { padding: 48px 24px; }
  .footer .inner { flex-direction: column; text-align: center; gap: 16px; }
}

@media (max-width: 480px) {
  .nav { padding: 12px 16px; }
  .nav .brand img { height: 16px; }
  .nav .links { gap: 10px; }
  .nav .links a { font-size: 12px; letter-spacing: 0.02em; }
  .section h2 { font-size: clamp(22px, 6vw, 30px); }
  .lifestyle .card img { height: 320px; }
  .dual-entry a { padding: 32px 24px; }
  .hero h1 { letter-spacing: 0.02em; }
}

/* ── 售后页（2026-11 改版：去电商感，改刊物质感） ── */
.sv-hero {
  position: relative;
  height: 58vh;
  min-height: 420px;
  overflow: hidden;
  background: var(--black);
}
.sv-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 55%;
  filter: brightness(0.52) saturate(0.9);
}
.sv-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.28) 55%, rgba(0, 0, 0, 0) 100%);
  pointer-events: none;
}
.sv-hero .txt {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 14%;
  width: min(1200px, 100% - 96px);
  color: var(--cream);
  z-index: 1;
}
.sv-hero .txt h1,
.sv-hero .txt p { max-width: 520px; }
.sv-hero .txt .section-title { color: var(--cream); opacity: 0.75; max-width: none; }
.sv-hero .txt h1 {
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.25;
  margin-bottom: 18px;
}
.sv-hero .txt p {
  font-size: 16px;
  font-weight: 300;
  color: rgba(244, 243, 240, 0.82);
  max-width: 460px;
}

.sv-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}
.sv-table th,
.sv-table td {
  text-align: left;
  vertical-align: top;
  padding: 22px 0;
  border-bottom: 1px solid rgba(28, 28, 28, 0.12);
}
.sv-table th {
  width: 220px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.sv-table td {
  font-size: 15px;
  font-weight: 300;
  color: var(--grey);
  line-height: 1.85;
}

.sv-rows { margin-top: 8px; border-top: 1px solid rgba(28, 28, 28, 0.12); }
.sv-rows .row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  padding: 30px 0;
  border-bottom: 1px solid rgba(28, 28, 28, 0.12);
}
.sv-rows h3 {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.sv-rows p {
  font-size: 15px;
  font-weight: 300;
  color: var(--grey);
  line-height: 1.9;
  max-width: 760px;
}
.sv-note {
  margin-top: 28px;
  font-size: 13px;
  font-weight: 300;
  color: var(--grey);
  letter-spacing: 0.02em;
}

@media (max-width: 860px) {
  .sv-hero { height: 42vh; min-height: 320px; }
  .sv-hero .txt { left: 24px; right: 24px; bottom: 10%; }
  .sv-table th, .sv-table td { display: block; width: 100%; padding: 0 0 6px; border: none; }
  .sv-table tr { display: block; padding: 20px 0; border-bottom: 1px solid rgba(28, 28, 28, 0.12); }
  .sv-table tr:last-child { border-bottom: none; }
  .sv-rows .row { grid-template-columns: 1fr; gap: 10px; padding: 24px 0; }
}