/* ============================================================
   以左香氛 YIZUO FRAGRANCE — 设计系统
   新中式 · 宋代美学：宣纸 / 汝窑天青 / 松烟墨 / 朱砂印
   ============================================================ */

:root {
  /* 色 */
  --paper: #f6f2e9;        /* 宣纸 */
  --paper-2: #efe9db;      /* 纸二 */
  --paper-3: #e7dfcd;      /* 纸三 · 深一阶 */
  --ink: #2a2822;          /* 松烟墨 */
  --ink-2: #57503f;        /* 淡墨 */
  --ink-3: #8a8271;        /* 灰墨 */
  --celadon: #7c9e97;      /* 汝窑天青 */
  --celadon-deep: #55756f; /* 深青 */
  --celadon-pale: #d9e4de; /* 天青淡 */
  --seal: #9e3d2e;         /* 朱砂印 */
  --gold: #a98a55;         /* 缃金 */

  --line: rgba(42, 40, 34, 0.16);
  --line-soft: rgba(42, 40, 34, 0.09);
  --shadow-soft: 0 18px 50px -18px rgba(42, 40, 34, 0.28);

  /* 字 */
  --f-display: "Kaiti SC", "KaiTi", "STKaiti", "DFKai-SB", "TW-Kai", "Noto Serif SC", serif;
  --f-body: "FangSong", "FangSong_GB2312", "STFangsong", "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
  --f-latin: Georgia, "Times New Roman", "Songti SC", serif;

  /* 节奏 */
  --sec-pad: clamp(84px, 12vw, 150px);
  --gutter: clamp(20px, 5vw, 64px);
  --maxw: 1200px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--f-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: 0.06em;
  overflow-x: hidden;
}

/* 纸纹 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.latin { font-family: var(--f-latin); letter-spacing: 0.14em; }

/* ---------- 印章 ---------- */
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4em;
  height: 2.4em;
  background: var(--seal);
  color: #f3ecdd;
  font-family: var(--f-display);
  font-size: 15px;
  line-height: 1.15;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1.5px rgba(243, 236, 221, 0.35), 0 4px 14px -4px rgba(158, 61, 46, 0.5);
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.1em;
  user-select: none;
}

/* ---------- 顶栏 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.45s var(--ease-out), box-shadow 0.45s, backdrop-filter 0.45s;
}
.nav-in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav.scrolled {
  background: rgba(246, 242, 233, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}
.brand .seal { width: 2.2em; height: 2.2em; font-size: 13px; }
.brand-name {
  font-family: var(--f-display);
  font-size: 22px;
  letter-spacing: 0.22em;
  white-space: nowrap;
}
.brand-sub {
  display: block;
  font-family: var(--f-latin);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--ink-3);
  margin-top: 1px;
  text-transform: uppercase;
}
.nav.on-hero .brand-name,
.nav.on-hero .brand-sub,
.nav.on-hero .nav-link { color: #f3efe4; text-shadow: 0 1px 14px rgba(20, 20, 16, 0.45); }
.nav.on-hero .nav-link::after { background: #f3efe4; }
.nav.on-hero .lang-btn { border-color: rgba(243, 239, 228, 0.55); color: #f3efe4; }
.nav.scrolled .brand-name, .nav.scrolled .nav-link { color: var(--ink); text-shadow: none; }
.nav.scrolled .lang-btn { border-color: var(--line); color: var(--ink); }

.nav-links { display: flex; gap: clamp(14px, 2.6vw, 34px); align-items: center; }
.nav-link {
  font-size: 15.5px;
  letter-spacing: 0.18em;
  position: relative;
  padding: 4px 0;
  opacity: 0.92;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: currentColor;
  transition: right 0.4s var(--ease-out);
}
.nav-link:hover::after { right: 0; }

.lang-btn {
  font-family: var(--f-latin);
  font-size: 12px;
  letter-spacing: 0.22em;
  border: 1px solid var(--line);
  padding: 7px 14px;
  border-radius: 999px;
  transition: all 0.3s;
  white-space: nowrap;
}
.lang-btn:hover { background: var(--seal); border-color: var(--seal); color: #f3ecdd; }

/* 语言切换组 */
.langs { display: flex; gap: 5px; align-items: center; }
.lang-btn.on, .nav.on-hero .lang-btn.on {
  background: var(--seal);
  border-color: var(--seal);
  color: #f3ecdd;
  pointer-events: none;
}
@media (min-width: 761px) and (max-width: 1150px) {
  .nav-links { gap: 14px; }
  .nav-link { font-size: 13.5px; letter-spacing: 0.08em; }
  .langs { gap: 4px; }
  .lang-btn { padding: 6px 10px; letter-spacing: 0.1em; }
}

.burger {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  position: relative;
  z-index: 120;
}
.burger span, .burger span::before, .burger span::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 16px; height: 1.5px;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: all 0.35s var(--ease-out);
}
.burger span::before { transform: translate(-50%, calc(-50% - 5px)); }
.burger span::after { transform: translate(-50%, calc(-50% + 5px)); }
.burger.open span { background: transparent; }
.burger.open span::before { transform: translate(-50%, -50%) rotate(45deg); }
.burger.open span::after { transform: translate(-50%, -50%) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("../img/hero.jpg") center / cover no-repeat;
  animation: heroZoom 18s var(--ease-out) both;
}
@keyframes heroZoom { from { transform: scale(1.1); } to { transform: scale(1); } }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(24, 26, 22, 0.72) 0%, rgba(24, 26, 22, 0.42) 46%, rgba(24, 26, 22, 0.08) 78%),
    linear-gradient(to top, rgba(24, 26, 22, 0.55), transparent 38%);
}

/* 香烟 */
.smoke { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.smoke i {
  position: absolute;
  border-radius: 50%;
  filter: blur(46px);
  mix-blend-mode: screen;
  opacity: 0.5;
}
.smoke i:nth-child(1) {
  width: 340px; height: 340px;
  left: 46%; bottom: -12%;
  background: radial-gradient(circle, rgba(217, 228, 222, 0.5), transparent 65%);
  animation: drift 16s ease-in-out infinite;
}
.smoke i:nth-child(2) {
  width: 260px; height: 260px;
  left: 55%; bottom: -8%;
  background: radial-gradient(circle, rgba(246, 242, 233, 0.34), transparent 62%);
  animation: drift 21s ease-in-out 3s infinite reverse;
}
.smoke i:nth-child(3) {
  width: 190px; height: 190px;
  left: 42%; bottom: -6%;
  background: radial-gradient(circle, rgba(169, 138, 87, 0.2), transparent 60%);
  animation: drift 26s ease-in-out 6s infinite;
}
@keyframes drift {
  0%   { transform: translate(0, 0) scale(0.9); opacity: 0; }
  22%  { opacity: 0.55; }
  60%  { transform: translate(-70px, -46vh) scale(1.25); opacity: 0.3; }
  100% { transform: translate(-120px, -88vh) scale(1.6); opacity: 0; }
}

.hero-in {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 140px var(--gutter) 120px;
  color: #f3efe4;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--f-latin);
  font-size: 12px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 30px;
}
.hero-eyebrow::before { content: ""; width: 44px; height: 1px; background: rgba(243, 239, 228, 0.6); }
.hero h1 {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(46px, 8.6vw, 104px);
  line-height: 1.28;
  letter-spacing: 0.12em;
  text-shadow: 0 2px 40px rgba(20, 20, 16, 0.35);
}
.hero h1 em {
  font-style: normal;
  color: #d8e4de;
  position: relative;
  white-space: nowrap;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 2%; right: 2%; bottom: 0.06em;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 228, 222, 0.75), transparent);
}
.hero-sub {
  margin-top: 28px;
  max-width: 34em;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 2.15;
  opacity: 0.92;
}
.hero-cta { margin-top: 46px; display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 15px 34px;
  font-size: 15.5px;
  letter-spacing: 0.22em;
  border-radius: 2px;
  border: 1px solid rgba(243, 239, 228, 0.65);
  color: #f3efe4;
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.btn i { font-style: normal; font-family: var(--f-latin); font-size: 12px; transition: transform 0.4s var(--ease-out); }
.btn:hover { background: #f3efe4; color: var(--ink); border-color: #f3efe4; }
.btn:hover i { transform: translateX(5px); }
.btn-solid { background: var(--seal); border-color: var(--seal); color: #f3ecdd; }
.btn-solid:hover { background: #f3efe4; color: var(--ink); border-color: #f3efe4; }

/* 竖排题字 */
.hero-inscription {
  position: absolute;
  right: clamp(20px, 5vw, 72px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  writing-mode: vertical-rl;
  font-family: var(--f-display);
  font-size: clamp(15px, 1.7vw, 20px);
  letter-spacing: 0.5em;
  color: rgba(243, 239, 228, 0.82);
  border-right: 1px solid rgba(243, 239, 228, 0.28);
  padding-right: 18px;
  height: min(52vh, 430px);
  display: flex;
  align-items: center;
  text-shadow: 0 1px 18px rgba(20, 20, 16, 0.5);
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(243, 239, 228, 0.75);
  font-size: 11px;
  letter-spacing: 0.4em;
  writing-mode: vertical-rl;
}
.scroll-hint::after {
  content: "";
  width: 1px; height: 52px;
  background: linear-gradient(to bottom, rgba(243, 239, 228, 0.7), transparent);
  animation: hintDrop 2.2s ease-in-out infinite;
}
@keyframes hintDrop { 0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; } 50% { transform: scaleY(1); opacity: 1; } }

/* ---------- 通用板块 ---------- */
.sec { padding: var(--sec-pad) 0; position: relative; }
.sec-alt { background: var(--paper-2); }

.sec-head { margin-bottom: clamp(44px, 6vw, 76px); position: relative; }
.sec-no {
  position: absolute;
  top: -0.72em;
  left: -0.08em;
  font-family: var(--f-latin);
  font-size: clamp(88px, 13vw, 168px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(42, 40, 34, 0.14);
  pointer-events: none;
  user-select: none;
}
.sec-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-latin);
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--seal);
  margin-bottom: 18px;
}
.sec-kicker::before { content: ""; width: 34px; height: 1px; background: var(--seal); opacity: 0.7; }
.sec h2 {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(32px, 4.6vw, 54px);
  letter-spacing: 0.14em;
  line-height: 1.4;
}
.sec-lead { margin-top: 18px; color: var(--ink-2); max-width: 42em; }

/* ---------- 品牌理念 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(36px, 6vw, 84px);
  align-items: start;
}
.about-quote {
  writing-mode: vertical-rl;
  font-family: var(--f-display);
  font-size: clamp(19px, 2.1vw, 25px);
  letter-spacing: 0.34em;
  line-height: 2.6;
  color: var(--ink);
  height: 100%;
  min-height: 380px;
  border-right: 1px solid var(--line);
  padding-right: clamp(18px, 2.4vw, 30px);
  margin-left: auto;
}
.about-quote small {
  font-size: 0.62em;
  color: var(--ink-3);
  letter-spacing: 0.3em;
  margin-top: 2em;
}
.about-copy p { color: var(--ink-2); margin-bottom: 1.4em; }
.about-copy p strong { color: var(--ink); font-weight: normal; border-bottom: 1px solid rgba(158, 61, 46, 0.4); }

.values { margin-top: 40px; display: grid; gap: 0; }
.value {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
  align-items: baseline;
}
.value:last-child { border-bottom: 1px solid var(--line-soft); }
.value-no {
  font-family: var(--f-display);
  font-size: 26px;
  color: var(--seal);
  letter-spacing: 0;
}
.value h3 { font-family: var(--f-display); font-size: 20px; letter-spacing: 0.16em; font-weight: 400; }
.value p { color: var(--ink-2); font-size: 15.5px; margin-top: 4px; }

/* ---------- 产品 ---------- */
.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 3vw, 36px);
}
.product {
  background: var(--paper);
  border: 1px solid var(--line-soft);
  position: relative;
  transition: transform 0.55s var(--ease-out), box-shadow 0.55s;
  display: flex;
  flex-direction: column;
}
.product:hover { transform: translateY(-8px); box-shadow: var(--shadow-soft); }
.product-img { aspect-ratio: 4 / 4.6; overflow: hidden; position: relative; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease-out); }
.product:hover .product-img img { transform: scale(1.06); }
.product-img::after {
  content: "";
  position: absolute; inset: 0;
  box-shadow: inset 0 0 0 1px rgba(246, 242, 233, 0.22);
  pointer-events: none;
}
.product-body { padding: 28px 26px 30px; flex: 1; display: flex; flex-direction: column; }
.product-no {
  font-family: var(--f-latin);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 10px;
}
.product h3 {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 0.18em;
}
.product .en {
  font-family: var(--f-latin);
  font-size: 12.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 4px;
}
.product p { color: var(--ink-2); font-size: 15.5px; margin-top: 14px; flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--celadon-deep);
  border: 1px solid rgba(85, 117, 111, 0.35);
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.products-note {
  margin-top: 40px;
  padding: 22px 28px;
  border: 1px dashed rgba(158, 61, 46, 0.4);
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.products-note .seal { width: 1.9em; height: 1.9em; font-size: 12px; }

/* ---------- 工厂与研发 ---------- */
.factory-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: end;
  gap: 0 clamp(14px, 2vw, 28px);
}
.factory-img-a {
  grid-column: 1 / 8;
  position: relative;
}
.factory-img-b {
  grid-column: 8 / 13;
  position: relative;
  transform: translateY(-64px);
}
.factory-img { position: relative; }
.factory-img img { width: 100%; aspect-ratio: 4 / 3.1; object-fit: cover; }
.factory-img-a .factory-img img { aspect-ratio: 4 / 4.7; }
.factory-img::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(246, 242, 233, 0.5);
  z-index: 1;
  pointer-events: none;
}
.factory-cap {
  margin-top: 14px;
  font-size: 13.5px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
  display: flex;
  justify-content: space-between;
  gap: 10px;
}
.factory-cap b { color: var(--ink-2); font-weight: normal; }

.stats {
  margin-top: -20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.stat { padding: 34px 8px 6px; text-align: left; }
.stat + .stat { border-left: 1px solid var(--line-soft); padding-left: clamp(14px, 2vw, 30px); }
.stat b {
  font-family: var(--f-latin);
  font-weight: 400;
  font-size: clamp(34px, 4.4vw, 54px);
  color: var(--ink);
  line-height: 1.1;
}
.stat b i { font-style: normal; font-family: var(--f-display); font-size: 0.44em; color: var(--seal); margin-left: 6px; letter-spacing: 0.1em; }
.stat span { display: block; margin-top: 8px; color: var(--ink-2); font-size: 14.5px; letter-spacing: 0.14em; }

/* ---------- 服务 ---------- */
.services {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2vw, 26px);
}
.svc {
  padding: 34px 26px 30px;
  border: 1px solid var(--line-soft);
  background: var(--paper);
  position: relative;
  overflow: hidden;
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s, border-color 0.5s;
}
.svc::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--celadon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}
.svc:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); border-color: transparent; }
.svc:hover::before { transform: scaleX(1); }
.svc-no {
  font-family: var(--f-display);
  font-size: 30px;
  color: rgba(124, 158, 151, 0.55);
}
.svc h3 { font-family: var(--f-display); font-weight: 400; font-size: 21px; letter-spacing: 0.14em; margin-top: 14px; }
.svc .en { font-family: var(--f-latin); font-size: 11.5px; letter-spacing: 0.2em; color: var(--ink-3); text-transform: uppercase; margin-top: 3px; }
.svc p { color: var(--ink-2); font-size: 15px; margin-top: 12px; }

/* 流程 */
.process { margin-top: clamp(48px, 6vw, 72px); }
.process-title {
  text-align: center;
  font-family: var(--f-display);
  font-size: 22px;
  letter-spacing: 0.3em;
  color: var(--ink-2);
  margin-bottom: 40px;
}
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 23px; left: 6%; right: 6%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line) 0 7px, transparent 7px 13px);
}
.step { text-align: center; position: relative; }
.step-no {
  width: 46px; height: 46px;
  margin: 0 auto;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-latin);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--seal);
  position: relative;
  z-index: 1;
}
.step h4 { font-family: var(--f-display); font-weight: 400; font-size: 18px; letter-spacing: 0.2em; margin-top: 16px; }
.step p { font-size: 13.5px; color: var(--ink-3); margin-top: 6px; line-height: 1.8; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(36px, 6vw, 90px);
}
.contact-info h3 { font-family: var(--f-display); font-weight: 400; font-size: 26px; letter-spacing: 0.14em; }
.contact-list { margin-top: 30px; display: grid; gap: 20px; }
.contact-item { display: grid; grid-template-columns: 84px 1fr; gap: 14px; align-items: baseline; }
.contact-item dt { font-size: 13.5px; letter-spacing: 0.3em; color: var(--ink-3); }
.contact-item dd { font-size: 16px; color: var(--ink); }
.contact-item dd .latin { letter-spacing: 0.06em; }

.form { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label {
  display: block;
  font-size: 13.5px;
  letter-spacing: 0.28em;
  color: var(--ink-2);
  margin-bottom: 8px;
}
.field label i { font-style: normal; color: var(--seal); margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 10px 2px;
  font-family: var(--f-body);
  font-size: 16px;
  color: var(--ink);
  letter-spacing: 0.08em;
  border-radius: 0;
  transition: border-color 0.3s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-bottom-color: var(--seal);
}
.field textarea { resize: vertical; min-height: 110px; }
.field select { appearance: none; cursor: pointer; }
.form-note { font-size: 13px; color: var(--ink-3); letter-spacing: 0.1em; }
.form .btn {
  justify-self: start;
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  font-family: var(--f-body);
}
.form .btn:hover { background: var(--ink); color: var(--paper); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 46px 0 40px;
  background: var(--paper);
}
.footer-in {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.footer .brand-name { font-size: 18px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; font-size: 14px; color: var(--ink-2); }
.footer-links a:hover { color: var(--seal); }
.footer-meta { width: 100%; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-3); letter-spacing: 0.12em; border-top: 1px solid var(--line-soft); padding-top: 22px; margin-top: 6px; }

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  filter: blur(5px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out), filter 1s var(--ease-out);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; filter: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .smoke i, .scroll-hint::after, .hero-bg { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .products { grid-template-columns: repeat(2, 1fr); }
  .services { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-quote { writing-mode: horizontal-tb; border-right: 0; border-left: 2px solid var(--seal); padding: 4px 0 4px 24px; min-height: 0; margin-left: 0; }
  .about-quote small { margin-top: 8px; }
  .hero-inscription { display: none; }
  .factory-img-b { transform: translateY(-34px); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(246, 242, 233, 0.97);
    backdrop-filter: blur(18px);
    flex-direction: column;
    justify-content: center;
    gap: 34px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; }
  .nav-link { font-size: 21px; letter-spacing: 0.3em; }
  .nav.on-hero .nav-link, .nav.on-hero .brand-name { color: var(--ink); text-shadow: none; }
  .burger { display: block; }
  .nav-in { padding-top: 14px; padding-bottom: 14px; }
  .brand-name { font-size: 19px; }
  .lang-btn { padding: 6px 11px; }
  .langs { flex-wrap: wrap; justify-content: center; row-gap: 9px; margin-top: 4px; }

  .products { grid-template-columns: 1fr; }
  .services { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 8px; }
  .stat + .stat { border-left: 0; padding-left: 8px; }
  .stat:nth-child(even) { border-left: 1px solid var(--line-soft); padding-left: clamp(14px, 2vw, 30px); }
  .steps { grid-template-columns: 1fr; gap: 30px; }
  .steps::before { display: none; }
  .step { display: grid; grid-template-columns: 46px 1fr; text-align: left; gap: 0 16px; }
  .step-no { margin: 0; grid-row: span 2; }
  .step h4 { margin-top: 8px; }
  .factory-grid { display: grid; grid-template-columns: 1fr; }
  .factory-img-a { grid-column: 1; }
  .factory-img-b { grid-column: 1; transform: none; margin-top: 18px; }
  .factory-img-a .factory-img img { aspect-ratio: 4 / 3.4; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-in { padding-top: 120px; padding-bottom: 90px; }
}
@media (max-width: 420px) {
  .brand-sub { display: none; }
  .products-note { padding: 18px; }
}