/* ==========================================================================
   COMMA 克默 — 官网样式
   内核：人生漫漫，此处克默 · 人性的光辉
   ========================================================================== */

:root {
  /* 底色与墨色 */
  --paper:      #F7F5F0;   /* 玉尘白 */
  --paper-warm: #EFEBE3;
  --ink:        #1A1917;   /* 墨 */
  --ink-soft:   #55524D;
  --ink-faint:  #8E8A82;
  --line:       #DED9CF;

  /* 凝光紫 —— 主推色 */
  --purple:     #6E5A8E;
  --purple-ink: #4A3D63;

  /* 四季 */
  --spring:     #7D9B76;   /* 苍筤绿 */
  --summer:     #A8443E;   /* 茜草红 */
  --autumn:     #C2A05A;   /* 缃叶黄 */
  --winter:     #C9D4D8;   /* 玉尘白 */

  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC",
           "SimSun", "Times New Roman", serif;
  --sans:  "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
           -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
  --maxw: 1180px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 2;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

/* ---------- 版心 ---------- */
.wrap { width: min(100% - 48px, var(--maxw)); margin-inline: auto; }
.narrow { width: min(100% - 48px, 760px); margin-inline: auto; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px clamp(20px, 5vw, 56px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .5s var(--ease), background .5s var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--line); }

.nav__brand {
  display: flex; align-items: center; gap: 12px;
  font-size: 19px; letter-spacing: .3em; text-transform: uppercase;
  font-weight: 400; padding-left: .3em;
}
.nav__brand small {
  display: block; font-family: var(--sans); font-size: 10px;
  letter-spacing: .42em; color: var(--ink-faint); margin-top: 2px;
  padding-left: .1em;
}
/* 品牌标记：金文「㤅」 */
.nav__mark { width: 34px; height: 34px; flex: none; }

.nav__links { display: flex; gap: clamp(18px, 3vw, 40px); }
.nav__links a {
  font-size: 14.5px; letter-spacing: .18em; color: var(--ink-soft);
  position: relative; padding-block: 4px; transition: color .35s var(--ease);
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--purple); transition: width .45s var(--ease);
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--ink); }
.nav__links a:hover::after, .nav__links a[aria-current="page"]::after { width: 100%; }

.nav__toggle { display: none; }

/* ---------- 首屏 ---------- */
.hero {
  min-height: 100svh;
  display: grid; place-items: center;
  text-align: center;
  padding: 140px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero__glow {
  position: absolute; z-index: 0;
  width: min(78vw, 760px); aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%,
              color-mix(in srgb, var(--purple) 20%, transparent) 0%,
              transparent 62%);
  filter: blur(18px);
  animation: breathe 12s var(--ease) infinite alternate;
}
@keyframes breathe {
  from { transform: scale(.9); opacity: .55; }
  to   { transform: scale(1.08); opacity: .95; }
}
.hero__inner { position: relative; z-index: 1; }

/* 首屏品牌标记 —— 直接可见 */
.hero__mark {
  width: clamp(150px, 22vw, 300px); height: auto;
  margin: 0 auto clamp(34px, 4.5vw, 56px);
  display: block;
}

.hero__eyebrow {
  font-family: var(--sans); font-size: 11px; letter-spacing: .5em;
  color: var(--ink-faint); text-transform: uppercase; margin-bottom: 40px;
  padding-left: .5em;
}
.hero__title {
  font-size: clamp(34px, 6.6vw, 76px);
  font-weight: 400; line-height: 1.5; margin: 0;
  letter-spacing: .16em; text-indent: .16em;
}
.hero__rule {
  width: 1px; height: 72px; margin: 44px auto;
  background: linear-gradient(var(--line), transparent);
}
.hero__sub {
  font-size: clamp(15px, 1.7vw, 18px); color: var(--ink-soft);
  max-width: 30em; margin: 0 auto; line-height: 2.3;
}
.hero__scroll {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  font-family: var(--sans); font-size: 10px; letter-spacing: .4em;
  color: var(--ink-faint); z-index: 1;
}

/* ---------- 通用区块 ---------- */
.section { padding: clamp(88px, 13vw, 176px) 0; }
.section--tight { padding: clamp(64px, 8vw, 108px) 0; }
.section--tint { background: var(--paper-warm); }
.section--ink { background: var(--ink); color: var(--paper); }
.section--ink .eyebrow,
.section--ink .lead { color: color-mix(in srgb, var(--paper) 62%, transparent); }

.eyebrow {
  font-family: var(--sans); font-size: 10.5px; letter-spacing: .46em;
  text-transform: uppercase; color: var(--ink-faint);
  margin: 0 0 26px; padding-left: .46em;
}
h1, h2, h3 { font-weight: 400; margin: 0; }

.h-sec {
  font-size: clamp(25px, 3.4vw, 40px); line-height: 1.68;
  letter-spacing: .1em; margin-bottom: 30px;
}
.lead {
  font-size: clamp(15.5px, 1.75vw, 18.5px); line-height: 2.35;
  color: var(--ink-soft); margin: 0 0 22px;
}
.lead:last-child { margin-bottom: 0; }
.prose p { margin: 0 0 22px; line-height: 2.35; color: var(--ink-soft); }
.prose p:last-child { margin-bottom: 0; }
.prose strong { font-weight: 400; color: var(--ink); }

/* 竖排引文 */
.pull {
  border-left: 1px solid var(--line); padding-left: 28px;
  margin: 40px 0; font-size: clamp(17px, 2.1vw, 22px);
  line-height: 2.1; color: var(--ink); letter-spacing: .1em;
}

/* ---------- 两栏 ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 6vw, 88px); align-items: center;
}
.split--top { align-items: start; }
.split__media img {
  width: 100%; border-radius: 2px;
  box-shadow: 0 32px 70px -44px rgba(26,25,23,.5);
}
.split--flip .split__media { order: 2; }

/* ---------- 观 · 四步 ---------- */
.steps { counter-reset: s; margin-top: 12px; }
.step {
  counter-increment: s;
  display: grid; grid-template-columns: 84px 1fr;
  gap: 28px; padding: 34px 0; border-top: 1px solid var(--line);
  align-items: baseline;
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step::before {
  content: "0" counter(s);
  font-family: var(--sans); font-size: 12px; letter-spacing: .3em;
  color: var(--purple);
}
.step__t { font-size: 21px; letter-spacing: .14em; margin-bottom: 8px; }
.step__d { color: var(--ink-soft); font-size: 16px; line-height: 2.15; margin: 0; }

/* ---------- 四季 ---------- */
.seasons {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(14px, 2vw, 26px); margin-top: 56px;
}
.season { text-align: center; }
.season__swatch {
  aspect-ratio: 3 / 4; border-radius: 2px; overflow: hidden;
  position: relative; background: var(--paper-warm);
}
.season__swatch img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.1s var(--ease);
}
.season:hover .season__swatch img { transform: scale(1.045); }
.season__bar { height: 3px; margin: 22px auto 16px; width: 34px; }
.season__name { font-size: 18px; letter-spacing: .22em; text-indent: .22em; }
.season__from {
  font-family: var(--sans); font-size: 12px; color: var(--ink-faint);
  letter-spacing: .06em; margin-top: 10px; line-height: 1.9;
}
.season[data-s="spring"] .season__bar { background: var(--spring); }
.season[data-s="summer"] .season__bar { background: var(--summer); }
.season[data-s="autumn"] .season__bar { background: var(--autumn); }
.season[data-s="winter"] .season__bar { background: var(--winter); }

/* ---------- 三款构图 ---------- */
.trio {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2.4vw, 32px); margin-top: 56px;
}
.trio figure { margin: 0; }
.trio figure img {
  width: 100%; border-radius: 2px; background: var(--paper-warm);
  box-shadow: 0 26px 56px -40px rgba(26,25,23,.45);
}
.trio figcaption {
  margin-top: 20px; font-size: 15px; letter-spacing: .16em;
  color: var(--ink-soft); text-align: center;
}
.trio figcaption span {
  display: block; font-family: var(--sans); font-size: 11.5px;
  color: var(--ink-faint); letter-spacing: .1em; margin-top: 8px;
}

/* ---------- 十字库 ---------- */
.axes {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  margin-top: 48px;
}
.axis { background: var(--paper); padding: 34px 26px; }
.axis__n {
  font-family: var(--sans); font-size: 11px; letter-spacing: .34em;
  color: var(--purple); margin-bottom: 18px;
}
.axis__t { font-size: 20px; letter-spacing: .16em; margin-bottom: 12px; }
.axis__g {
  font-size: 30px; letter-spacing: .3em; color: var(--ink);
  margin-bottom: 12px; line-height: 1.5;
}
.axis__d { font-family: var(--sans); font-size: 13px; color: var(--ink-faint); line-height: 1.95; }

/* 十字表 */
.chart { width: 100%; border-collapse: collapse; margin-top: 44px; }
.chart th, .chart td {
  text-align: left; padding: 20px 18px; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.chart th {
  font-family: var(--sans); font-size: 11px; letter-spacing: .26em;
  color: var(--ink-faint); font-weight: 400; text-transform: uppercase;
  border-bottom-color: var(--ink);
}
.chart td:first-child { width: 88px; }
.chart .glyph {
  font-size: 30px; letter-spacing: 0; line-height: 1.2;
}
.chart td { font-size: 15.5px; line-height: 2.05; color: var(--ink-soft); }
.chart td.quote { color: var(--ink); letter-spacing: .08em; }

/* ---------- 工艺 ---------- */
.craft {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--line); border: 1px solid var(--line); margin-top: 48px;
}
.craft__col { background: var(--paper); padding: clamp(30px, 4vw, 48px); }
.craft__role {
  font-family: var(--sans); font-size: 10.5px; letter-spacing: .4em;
  text-transform: uppercase; color: var(--purple); margin-bottom: 16px;
}
.craft__t { font-size: 24px; letter-spacing: .18em; margin-bottom: 18px; }
.craft__d { color: var(--ink-soft); font-size: 15.5px; line-height: 2.2; margin: 0; }

/* ---------- 全幅图 ---------- */
.fullbleed {
  position: relative; min-height: 78svh; display: grid; place-items: center;
  text-align: center; overflow: hidden; color: #fff;
}
.fullbleed img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0;
}
.fullbleed::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(20,18,16,.34), rgba(20,18,16,.56));
}
.fullbleed__inner { position: relative; z-index: 2; padding: 100px 24px; }
.fullbleed__inner .eyebrow { color: rgba(255,255,255,.66); }
.fullbleed__q {
  font-size: clamp(21px, 3.1vw, 37px); line-height: 1.95;
  letter-spacing: .14em; margin: 0;
}

/* ---------- 卡片网格 ---------- */
.grid3 {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3.4vw, 46px); margin-top: 52px;
}
.card__n {
  font-family: var(--sans); font-size: 11px; letter-spacing: .34em;
  color: var(--purple); margin-bottom: 16px;
}
.card__t { font-size: 21px; letter-spacing: .14em; margin-bottom: 14px; }
.card__d { color: var(--ink-soft); font-size: 15.5px; line-height: 2.2; margin: 0; }

/* ---------- 包装 ---------- */
.boxes {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2.4vw, 30px); margin-top: 52px;
}
.boxes figure { margin: 0; }
.boxes img { width: 100%; border-radius: 2px; }
.boxes figcaption {
  margin-top: 18px; text-align: center; font-size: 14.5px;
  letter-spacing: .18em; color: var(--ink-soft);
}

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  margin-top: 48px;
}
.contact-cell { background: var(--paper); padding: clamp(28px, 3.6vw, 44px); }
.contact-cell .k {
  font-family: var(--sans); font-size: 10.5px; letter-spacing: .4em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: 16px;
}
.contact-cell .v { font-size: 20px; letter-spacing: .1em; }
.contact-cell .v a { border-bottom: 1px solid var(--line); padding-bottom: 3px; }
.contact-cell .v a:hover { border-bottom-color: var(--purple); color: var(--purple); }

/* ---------- 表单 ---------- */
.field { display: block; }
.field > span {
  display: block; margin-bottom: 10px;
  font-family: var(--sans); font-size: 12px; letter-spacing: .22em;
  color: var(--ink-faint);
}
.field input, .field textarea {
  width: 100%; padding: 15px 0; border: 0;
  border-bottom: 1px solid var(--line); border-radius: 0;
  background: transparent; color: var(--ink);
  font-family: var(--serif); font-size: 17px; letter-spacing: .06em;
  line-height: 2; outline: none; resize: vertical;
  transition: border-color .4s var(--ease);
}
.field input:focus, .field textarea:focus { border-bottom-color: var(--ink); }

/* ---------- 页脚 ---------- */
.foot {
  border-top: 1px solid var(--line);
  padding: 64px 0 40px; margin-top: 0;
}
.foot__grid {
  display: flex; flex-wrap: wrap; gap: 32px;
  justify-content: space-between; align-items: flex-end;
}
.foot__id { display: flex; align-items: center; gap: 16px; }
.foot__mark { width: 42px; height: 42px; flex: none; opacity: .9; }
.foot__brand { font-size: 17px; letter-spacing: .24em; }
.foot__meta {
  font-family: var(--sans); font-size: 12px; color: var(--ink-faint);
  line-height: 2.1; letter-spacing: .04em;
}
.foot__links { display: flex; gap: 26px; font-size: 13.5px; color: var(--ink-soft); }
.foot__links a:hover { color: var(--purple); }
.foot__base {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line);
  font-family: var(--sans); font-size: 11.5px; letter-spacing: .1em;
  color: var(--ink-faint); text-align: center;
}

/* 线性按钮 */
.btn-line {
  display: inline-block; padding: 15px 42px;
  border: 1px solid var(--ink); font-size: 15px; letter-spacing: .24em;
  transition: background .4s var(--ease), color .4s var(--ease);
}
.btn-line:hover { background: var(--ink); color: var(--paper); }
.section--ink .btn-line { border-color: currentColor; }
.section--ink .btn-line:hover { background: var(--paper); color: var(--ink); }

/* ---------- 进场动效 ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity 1.05s var(--ease), transform 1.05s var(--ease);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .hero__glow { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--flip .split__media { order: 0; }
  .seasons { grid-template-columns: repeat(2, 1fr); gap: 30px 18px; }
  .trio { grid-template-columns: 1fr; }
  .axes { grid-template-columns: repeat(2, 1fr); }
  .craft { grid-template-columns: 1fr; }
  .grid3 { grid-template-columns: 1fr; }
  .boxes { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  body { font-size: 16px; line-height: 1.95; }
  .nav__links {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px 0 18px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .35s var(--ease), transform .35s var(--ease);
  }
  .nav__links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav__links a { padding: 15px clamp(20px, 5vw, 56px); font-size: 16px; }
  .nav__toggle {
    display: block; background: none; border: 0; cursor: pointer;
    padding: 8px; color: var(--ink);
  }
  .nav__toggle span {
    display: block; width: 22px; height: 1px; background: currentColor;
    margin: 5px 0; transition: transform .35s var(--ease), opacity .3s;
  }
  .nav__toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav__toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav__toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .chart th:nth-child(2), .chart td:nth-child(2) { display: none; }
  .chart th, .chart td { padding: 16px 10px; }
  .step { grid-template-columns: 52px 1fr; gap: 16px; }
}