/* ============================================================
   凡特品牌设计 · FANTE STUDIO
   明快黄 × 简约风 设计系统
   主色：C0 M20 Y100 K0 = #FFCC00
   搭配：炭黑 / 暖灰 / 淡黄 / 纯白
   设计宽度：1600px 居中（适配 1920 屏）
   ============================================================ */

/* ---------- HarmonyOS Sans SC（本地部署，OpenHarmony 官方开源字体） ---------- */
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/HarmonyOS_Sans_SC_Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/HarmonyOS_Sans_SC_Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/HarmonyOS_Sans_SC_Bold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/HarmonyOS_Sans_SC_Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/HarmonyOS_Sans_SC_Black.woff2") format("woff2");
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

:root {
  /* ── 黄色系调色板 ── */
  --yellow: #FFCC00;        /* 主色 C0 M20 Y100 K0 */
  --yellow-deep: #E6B300;   /* 主色深一档（hover/按压） */
  --yellow-pale: #FFF7DE;   /* 淡黄底（分区/色块） */
  --yellow-soft: #FFE066;   /* 亮黄（小点缀） */

  /* ── 中性色 ── */
  --paper: #FFFFFF;         /* 主背景：纯白 */
  --mist: #F6F5F1;          /* 浅暖灰：分区背景 */
  --mist-2: #EFEDE7;        /* 更深一层灰（表单底） */
  --ink: #1B1A16;           /* 主文字：暖黑 */
  --ink-soft: #5E5A51;      /* 次级文字 */
  --ink-faint: #8F8A7F;     /* 弱文字 */
  --charcoal: #23211D;      /* 深炭：页脚/深色块 */
  --line: #E7E3DA;          /* 分隔线 */

  /* 字体：全站统一 HarmonyOS Sans SC，层级靠字重区分
     （900 Black 大标题 / 700 Bold 小标题·数字 / 500 Medium 强调 / 400 Regular 正文） */
  --font-serif: "HarmonyOS Sans SC", "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-sans: "HarmonyOS Sans SC", "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 空间节奏：以 8px 为基准，简约大留白 */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --section-gap: clamp(5rem, 9vw, 8.5rem);

  /* 圆角：简约风用更克制的圆角 */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;

  /* 动效 */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-quart: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 0.5s;

  /* 容器：1600px 设计宽度，居中 */
  --container: 1600px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  font-kerning: normal;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font: inherit; }

::selection { background: var(--yellow); color: var(--ink); }

:focus-visible { outline: 2px solid var(--yellow-deep); outline-offset: 3px; border-radius: 2px; }

/* 容器居中：物理属性兜底（旧内核可用）+ 逻辑属性增强，严格 1600px 水平居中 */
.container, .section {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
}

/* ============================================================
   导航
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--mist);
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.site-header.is-scrolled {
  background: var(--mist-2);
  box-shadow: 0 10px 28px -24px rgba(27, 26, 22, 0.35);
}
.nav-inner {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand-mark-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 9px;
  display: block;
}
.footer-brand .brand-mark-img { width: 52px; height: 52px; border-radius: 12px; }
.brand:hover .brand-mark-img { transform: rotate(-8deg) scale(1.05); }

.brand { display: flex; align-items: center; gap: clamp(0.8rem, 1.2vw, 1.4rem); }
.brand-mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--yellow); color: var(--ink);
  font-family: var(--font-serif); font-weight: 700; font-size: 1.25rem;
  border-radius: 9px;
  transition: transform var(--dur) var(--ease-out);
}
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.05); }
.brand-text { font-family: var(--font-serif); font-weight: 700; font-size: clamp(1.05rem, 1.1vw, 1.2rem); letter-spacing: 0.04em; line-height: 1.2; color: var(--ink); }
.brand-text em { display: block; font-style: normal; font-family: var(--font-sans); font-weight: 400; font-size: 0.6rem; letter-spacing: 0.32em; color: var(--ink-faint); }

.nav-links { display: flex; align-items: center; gap: clamp(1.2rem, 2.6vw, 2.6rem); }
.nav-links a {
  font-size: clamp(0.94rem, 1vw, 1.08rem); color: var(--ink-soft);
  position: relative; padding: 0.4rem 0;
  transition: color 0.3s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 2px; background: var(--yellow);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links .nav-cta {
  background: var(--ink); color: var(--paper);
  padding: 0.55rem 1.4rem; border-radius: 999px;
  font-weight: 500;
}
.nav-links .nav-cta::after { display: none; }
.nav-links .nav-cta:hover { background: var(--yellow); color: var(--ink); transform: translateY(-1px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 0.6rem; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); transition: transform 0.35s var(--ease-out), opacity 0.3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   首屏 Hero · 单栏居中
   ============================================================ */
.hero { padding: 170px 0 clamp(4rem, 7vw, 7rem); }
.hero-inner {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* 小标签 */
.hero-kicker {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-size: clamp(1.05rem, 1.15vw, 1.25rem);
  letter-spacing: 0.2em;
  color: var(--yellow);
  font-weight: 600;
  margin-bottom: clamp(1.6rem, 2.2vw, 2.4rem);
  padding: 0.45rem 1.2rem;
  border: 1px solid color-mix(in srgb, var(--yellow) 55%, transparent);
  background: color-mix(in srgb, var(--yellow) 18%, transparent);
  border-radius: 999px;
}
/* 电脑端：开头那个 8px「大点」去掉 —— 每项前面的点由各自 span 内的 .k-dot 提供，
   否则第一个项目前会出现两个点（大 8px + 小 6px） */
.hero-kicker::before { content: none; display: none; }
.k-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--yellow); flex-shrink: 0; display: inline-block; vertical-align: 0.18em; margin-right: 0.4em; }

/* 主标题（略收小一档，两行大字） */
.hero-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  line-height: 1.32;
  letter-spacing: 0.005em;
  margin-bottom: clamp(1.6rem, 2.4vw, 2.6rem);
  color: var(--ink);
}
.accent-serif {
  color: var(--ink);
  font-style: normal;
  position: relative;
  display: inline-block;
}
.accent-serif::after {
  content: "";
  position: absolute; left: -0.02em; right: -0.02em; bottom: 0.1em;
  height: 0.3em;
  background: var(--yellow);
  z-index: -1;
  border-radius: 3px;
}

/* 副标题（放大，随全屏宽度缩放） */
.hero-lead {
  font-size: clamp(1.25rem, 1.5vw, 1.6rem);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: clamp(2.2rem, 3vw, 3.2rem);
}

.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(2.4rem, 4.5vw, 5.5rem); margin-bottom: clamp(2.2rem, 3vw, 3.4rem); }
.hero-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem clamp(1.2rem, 2vw, 2.6rem); }
.hero-meta li {
  font-size: clamp(1rem, 1.15vw, 1.18rem); color: var(--ink-faint);
  display: flex; align-items: center; gap: 0.5rem;
}
.hero-meta li::before { content: "●"; font-size: 0.45rem; color: var(--yellow); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  font-weight: 600; font-size: 0.98rem;
  transition: transform 0.35s var(--ease-out), background 0.35s, color 0.35s, box-shadow 0.35s, border-color 0.35s;
}
.btn span { transition: transform 0.35s var(--ease-out); }
.btn:hover span { transform: translateX(4px); }
.btn-primary { background: var(--yellow); color: var(--ink); box-shadow: 0 12px 26px -14px color-mix(in srgb, var(--yellow) 65%, transparent); }
.btn-primary:hover { background: var(--yellow-deep); transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); transform: translateY(-2px); }
.btn-lg { padding: 1rem 2.3rem; font-size: 1.05rem; }
.btn-lg:hover { transform: translateY(-3px); }

/* ============================================================
   滚动条幅（黄底黑字，明快）
   ============================================================ */
.marquee {
  background: var(--yellow);
  color: var(--ink);
  padding: clamp(1.15rem, 1.6vw, 1.5rem) 0;
  overflow: hidden;
  position: relative;
  z-index: 5;
  border-top: 1px solid rgba(230, 179, 0, 0.35);
  border-bottom: 1px solid rgba(230, 179, 0, 0.35);
}
.marquee-track {
  display: flex; align-items: center; gap: clamp(2.6rem, 3.8vw, 4.6rem);
  width: max-content;
  animation: marquee 38s linear infinite;
  white-space: nowrap;
}
.marquee-track span {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(0.95rem, 1.05vw, 1.1rem);
  letter-spacing: 0.14em;
}
.marquee-track i { font-style: normal; font-size: 0.85rem; opacity: 0.55; }
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee-track { animation: none; flex-wrap: wrap; } }

/* ============================================================
   数据
   ============================================================ */
.stats { border-bottom: 1px solid var(--line); }
.stats-inner {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  margin-inline: auto;
  padding: clamp(2.6rem, 5vw, 4rem) clamp(1.5rem, 4vw, 4rem);
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.stat { text-align: center; position: relative; }
.stat:not(:last-child)::after {
  content: ""; position: absolute; right: 0; top: 18%; bottom: 18%;
  width: 1px; background: var(--line);
}
.stat b {
  display: block;
  font-family: var(--font-serif); font-weight: 900;
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.15; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat b sup { font-size: 0.5em; color: var(--yellow); font-weight: 700; }
.stat span { font-size: clamp(0.84rem, 0.95vw, 1rem); color: var(--ink-faint); letter-spacing: 0.08em; }

/* ============================================================
   通用章节
   ============================================================ */
.section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
  padding-block: var(--section-gap);
}

.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 2rem; margin-bottom: clamp(2.6rem, 5vw, 4rem);
}
.section-kicker {
  font-size: 0.78rem; letter-spacing: 0.3em; color: var(--yellow);
  margin-bottom: 0.7rem; font-weight: 600;
}
.section-title {
  font-family: var(--font-serif); font-weight: 900;
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.2; color: var(--ink);
}
.section-title::after {
  content: "";
  display: inline-block;
  width: 0.45em; height: 0.45em;
  margin-left: 0.35em;
  background: var(--yellow);
  border-radius: 2px;
  vertical-align: 0.14em;
}
.section-note { max-width: 42ch; color: var(--ink-soft); font-size: clamp(0.94rem, 1.05vw, 1.12rem); line-height: 1.85; }

/* ============================================================
   作品案例
   ============================================================ */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: clamp(0.5rem, 0.8vw, 0.9rem);
  margin-bottom: clamp(2.2rem, 3vw, 3.2rem);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.2rem;
}
.filter-btn {
  padding: 0.42rem 1.2rem;
  border-radius: 999px;
  font-size: clamp(0.88rem, 0.95vw, 1rem); color: var(--ink-soft);
  border: 1px solid transparent;
  transition: all 0.3s var(--ease-out);
}
.filter-btn:hover { color: var(--ink); border-color: var(--line); background: var(--mist); }
.filter-btn.is-active {
  background: var(--yellow); color: var(--ink);
  font-weight: 600;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.6rem, 2.6vw, 3.2rem);
}
.work-card { display: flex; flex-direction: column; }

.work-card.is-hidden { display: none; }
.work-card {
  animation: cardIn 0.55s var(--ease-out) both;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

.work-figure {
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--mist);
  border: 1px solid var(--line);
  /* 容器比例 = 用户真实图比例（1477:886 ≈ 5:3），主图 100% 填满，无留边无裁切 */
  aspect-ratio: 1477 / 886;
  margin-bottom: 1.15rem;
  position: relative;
}
.work-figure img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform 0.9s var(--ease-quart);
}
.work-figure::after {
  content: "查看详情 →";
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.78rem;
  opacity: 0; transform: translateY(8px);
  transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
  pointer-events: none;
}
/* 悬停不再缩放图片：保证任意比例的图都完整显示、两侧不被裁切 */
.work-card:hover .work-figure img { transform: none; }
.work-card:hover .work-figure::after { opacity: 1; transform: none; }

.work-tags { display: flex; gap: 0.4rem; margin-bottom: 0.55rem; flex-wrap: wrap; }
.work-tags span {
  font-size: 0.7rem; letter-spacing: 0.1em;
  color: var(--yellow);
  border: 1px solid color-mix(in srgb, var(--yellow) 55%, transparent);
  background: var(--yellow-pale);
  padding: 0.08rem 0.55rem; border-radius: 999px;
  font-weight: 600;
}
.work-card h3 {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(1.24rem, 1.3vw, 1.45rem); margin-bottom: 0.35rem; color: var(--ink);
}
.work-desc { font-size: clamp(0.9rem, 1vw, 1.02rem); color: var(--ink-soft); line-height: 1.75; margin-bottom: 0.7rem; }
.work-year { font-size: 0.78rem; color: var(--ink-faint); letter-spacing: 0.08em; margin-top: auto; }

/* ============================================================
   服务项目
   ============================================================ */
.services { background: var(--mist); }
.services .container, .services { max-width: none; }
.services .section-head {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
}

.service-groups {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 2.8vw, 3.2rem);
}
.service-group {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(1.6rem, 3vw, 2.6rem);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out), border-color 0.4s;
}
.service-group:hover { transform: translateY(-6px); box-shadow: 0 34px 60px -42px rgba(27,26,22,0.28); border-color: color-mix(in srgb, var(--yellow) 55%, var(--line)); }
.service-group-title {
  font-family: var(--font-serif); font-weight: 900;
  font-size: 1.4rem; margin-bottom: 1.6rem;
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding-bottom: 1rem; border-bottom: 2px solid var(--ink);
}
.service-group-title span { font-family: var(--font-sans); font-size: 0.68rem; letter-spacing: 0.3em; color: var(--ink-faint); font-weight: 400; }

.service-item {
  padding: clamp(0.9rem, 1.2vw, 1.25rem) 0;
  border-bottom: 1px dashed var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  transition: padding 0.3s var(--ease-out);
}
.service-item:last-child { border-bottom: none; }
.service-item:hover { padding-left: 0.5rem; }
.service-item h4 { font-weight: 600; font-size: clamp(1rem, 1.1vw, 1.15rem); margin-bottom: 0.15rem; }
.service-item p { font-size: clamp(0.82rem, 0.95vw, 0.95rem); color: var(--ink-faint); }
.service-meta {
  flex-shrink: 0;
  font-size: 0.72rem; color: var(--yellow);
  border: 1px solid color-mix(in srgb, var(--yellow) 55%, transparent);
  background: var(--yellow-pale);
  border-radius: 999px; padding: 0.1rem 0.65rem;
  white-space: nowrap;
  font-weight: 600;
}

.service-foot {
  max-width: var(--container);
  margin: clamp(2rem, 4vw, 3rem) auto 0;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  padding-inline: clamp(1.5rem, 4vw, 4rem);
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap;
  background: var(--charcoal); color: var(--paper);
  border-radius: var(--r-lg);
  padding-top: clamp(1.6rem, 3vw, 2.4rem);
  padding-bottom: clamp(1.6rem, 3vw, 2.4rem);
}
.service-foot p { font-size: 1.12rem; line-height: 1.75; }
.service-foot strong { color: var(--yellow); }
.service-foot .btn-ghost { border-color: var(--paper); color: var(--paper); font-size: 1.08rem; padding: 0.95rem 1.9rem; }
.service-foot .btn-ghost:hover { background: var(--yellow); color: var(--ink); border-color: var(--yellow); }

/* ============================================================
   接单流程
   ============================================================ */
.process-steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.4rem, 3vw, 3.6rem);
  counter-reset: step;
}
.step { position: relative; padding-top: 1rem; }
.step::before {
  content: "";
  position: absolute; top: 0; left: 0;
  width: 100%; height: 1px; background: var(--line);
}
.step::after {
  content: "";
  position: absolute; top: -4px; left: 0;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--yellow);
  border: 1px solid var(--yellow-deep);
}
.step-num {
  font-family: var(--font-serif); font-weight: 900;
  font-size: 2.6rem; color: var(--yellow);
  opacity: 0.95; display: block; line-height: 1.1; margin-bottom: 0.7rem;
  font-variant-numeric: tabular-nums;
}
.step h3 { font-family: var(--font-serif); font-weight: 700; font-size: 1.15rem; margin-bottom: 0.4rem; }
.step p { font-size: 0.88rem; color: var(--ink-soft); line-height: 1.8; }

/* ============================================================
   关于
   ============================================================ */
.about { background: var(--mist); max-width: none; }
.about .about-grid {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
  display: grid; grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2.5rem, 5vw, 6rem);
  align-items: center;
}
.about-lead {
  font-family: var(--font-serif); font-weight: 600;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.6; margin-bottom: 1.4rem;
}
.about-copy p:not(.section-kicker):not(.about-lead) {
  color: var(--ink-soft); font-size: 0.96rem; line-height: 1.95; margin-bottom: 1.1rem;
}
.about-copy p:not(.section-kicker):not(.about-lead)::first-letter { font-family: var(--font-serif); font-weight: 900; color: var(--yellow); font-size: 1.6em; line-height: 1; }

.about-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(2rem, 4vw, 3rem);
  text-align: center;
  position: relative;
  box-shadow: 0 44px 80px -52px rgba(27,26,22,0.35);
}
.about-card::before {
  content: ""; position: absolute; top: 10px; right: 10px; bottom: 10px; left: 10px;
  border: 1px dashed var(--line); border-radius: var(--r-md);
  pointer-events: none;
}
.about-card-mark {
  width: 92px; height: 92px; margin: 0 auto 1.2rem;
  display: block;
  object-fit: cover;
  border-radius: 20px;
}
.about-card-name { font-family: var(--font-serif); font-weight: 900; font-size: 1.5rem; }
.about-card-sub { font-size: 0.68rem; letter-spacing: 0.24em; color: var(--ink-faint); margin: 0.4rem 0 1.4rem; }
.about-card-line { width: 3.4rem; height: 4px; background: var(--yellow); margin: 0 auto 1.4rem; border-radius: 2px; }
.about-card-slogan { font-family: var(--font-serif); font-weight: 600; font-size: 1.05rem; line-height: 1.75; color: var(--ink-soft); }

/* ============================================================
   在线下单
   ============================================================ */
.order-wrap {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
}
.order-head { text-align: center; margin-bottom: 2.6rem; }
.order-sub { color: var(--ink-soft); margin-top: 0.8rem; font-size: 0.95rem; }
.order-sub strong { color: var(--yellow); }

/* ---------- 微信下单引导（v1.9：替代原表单） ---------- */
.order-wechat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(1.8rem, 4vw, 3.2rem);
  box-shadow: 0 44px 80px -64px rgba(27,26,22,0.3);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}
.wechat-card { display: flex; flex-direction: column; align-items: center; gap: 0.9rem; text-align: center; }
.qr-box {
  width: clamp(150px, 13vw, 190px);
  height: clamp(150px, 13vw, 190px);
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  padding: 10px;
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; }
.qr-fallback {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: var(--yellow-pale);
  color: var(--ink-soft); font-size: 0.95rem; line-height: 1.8; text-align: center;
}
.wechat-label { font-size: 0.82rem; color: var(--ink-faint); letter-spacing: 0.08em; }
.wechat-id { font-size: clamp(1.3rem, 1.8vw, 1.7rem); font-weight: 700; color: var(--ink); letter-spacing: 0.03em; }
.wechat-tip { font-size: 0.8rem; color: var(--ink-faint); margin-top: 0.6rem; }
.wechat-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(0.9rem, 1.5vw, 1.4rem);
}
.wstep {
  display: flex; gap: 0.9rem; align-items: flex-start;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: clamp(1rem, 1.6vw, 1.5rem);
}
.wstep b {
  flex-shrink: 0;
  width: 2.2rem; height: 2.2rem;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 700;
}
.wstep h4 { font-size: 1.02rem; font-weight: 700; margin-bottom: 0.3rem; }
.wstep p { font-size: 0.85rem; color: var(--ink-soft); line-height: 1.65; }
@media (max-width: 980px) {
  .order-wechat { grid-template-columns: 1fr; justify-items: center; }
  .wechat-steps { width: 100%; max-width: 520px; grid-template-columns: 1fr; }
}

.order-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(1.6rem, 4vw, 2.8rem);
  box-shadow: 0 44px 80px -64px rgba(27,26,22,0.3);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.2rem, 1.6vw, 1.8rem); }
.form-field { margin-bottom: 1.3rem; }
.form-field label {
  display: block; font-size: 0.86rem; font-weight: 600;
  margin-bottom: 0.5rem; letter-spacing: 0.03em;
}
.form-field label i { color: var(--yellow); font-style: normal; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 0.78rem 1rem;
  color: var(--ink);
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
  appearance: none;
  -webkit-appearance: none;
}
.form-field textarea { resize: vertical; min-height: 110px; }
.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235E5A51' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.4rem;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--ink-faint); opacity: 0.7; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--yellow);
  background: var(--paper);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--yellow) 30%, transparent);
}
.form-field input.err, .form-field select.err, .form-field textarea.err { border-color: #D83A2E; box-shadow: 0 0 0 3px rgba(216,58,46,0.12); }

.form-tip { font-size: 0.78rem; color: var(--ink-faint); margin: 0.2rem 0 1.4rem; }

/* 提交成功 */
.order-success { text-align: center; padding: 1rem 0 0.5rem; animation: cardIn 0.5s var(--ease-out); }
.success-mark {
  width: 64px; height: 64px; margin: 0 auto 1.2rem;
  display: grid; place-items: center;
  background: var(--yellow); color: var(--ink);
  border-radius: 50%;
  font-size: 1.7rem; font-weight: 700;
}
.order-success h3 { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 900; margin-bottom: 0.6rem; }
.order-success > p { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 1.4rem; }
.success-summary {
  text-align: left;
  background: var(--mist);
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  padding: 1.2rem 1.4rem;
  font-size: 0.9rem; line-height: 2; color: var(--ink);
  margin-bottom: 1.6rem;
  white-space: pre-wrap;
}
.success-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.success-tip { font-size: 0.85rem; color: var(--ink-faint); }
.success-tip b { color: var(--ink); }

.order-contact {
  margin-top: 1.6rem;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, 1.4vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.6rem clamp(1.4rem, 3vw, 2.2rem);
  background: var(--mist);
}
.contact-item span { display: block; font-size: 0.82rem; letter-spacing: 0.14em; color: var(--ink-faint); margin-bottom: 0.3rem; }
.contact-item b { font-size: 1.12rem; font-weight: 600; word-break: break-all; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--charcoal);
  color: var(--paper);
  padding: clamp(2.6rem, 5vw, 4rem) 0 2rem;
  margin-top: var(--section-gap);
}
.footer-top, .footer-bottom {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 4vw, 4rem);
}
.footer-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-bottom: 2.4rem; border-bottom: 1px solid color-mix(in srgb, var(--paper) 18%, transparent); }
.footer-brand { display: flex; gap: clamp(0.9rem, 1.4vw, 1.6rem); align-items: center; }
.footer-brand .brand-mark { background: var(--yellow); color: var(--ink); }
.footer-brand strong { font-family: var(--font-serif); font-size: 1.1rem; }
.footer-brand em { font-style: normal; font-size: 0.62rem; letter-spacing: 0.3em; color: color-mix(in srgb, var(--paper) 55%, transparent); }
.footer-links { display: flex; gap: clamp(1.2rem, 2vw, 2.6rem); flex-wrap: wrap; }
.footer-links a { font-size: 0.9rem; color: color-mix(in srgb, var(--paper) 75%, transparent); transition: color 0.3s; }
.footer-links a:hover { color: var(--yellow); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-top: 1.6rem; font-size: 0.8rem; color: color-mix(in srgb, var(--paper) 55%, transparent); }
.footer-tip { font-size: 0.72rem; }
/* 备案号 / 主体行：独占一整行（width:100% 在 row+wrap 下自动换行；column 下亦安全）
   order:3 保证排在「版权行 / tip 行」之后，否则会把 .footer-tip 挤到第三行 */
.footer-legal { order: 3; width: 100%; margin-top: 0.7rem; font-size: 0.72rem; }
.footer-legal .legal-icp::before { content: " · "; }
.footer-legal a { color: inherit; text-decoration: none; }
.footer-legal a:hover { text-decoration: underline; }

/* 回到顶部：默认隐藏，滚动后才显示（用 .is-visible class 控制，避免 [hidden] 被 display:grid 覆盖的 bug） */
.back-top {
  position: fixed; right: 1.4rem; bottom: 1.4rem;
  width: 46px; height: 46px;
  display: none;
  place-items: center;
  background: var(--ink); color: var(--paper);
  border-radius: 50%;
  font-size: 1.1rem;
  box-shadow: 0 12px 30px -12px rgba(27,26,22,0.45);
  z-index: 90;
  transition: transform 0.35s var(--ease-out), background 0.3s;
}
.back-top:hover { background: var(--yellow); color: var(--ink); transform: translateY(-4px); }
.back-top.is-visible { display: grid; animation: cardIn 0.4s var(--ease-out); }
.back-top-label { display: none; }

/* 手机端：胶囊形置顶按钮（图标 + "顶部"文字），更易点击，语义明确 */
@media (max-width: 720px) {
  .back-top {
    width: auto; height: auto;
    right: 1rem; bottom: 1.2rem;
    padding: 0.7rem 1rem 0.7rem 0.85rem;
    border-radius: 999px;
    flex-direction: row;
    gap: 0.4rem;
    font-size: 0.95rem;
    font-weight: 600;
    align-items: center;
  }
  .back-top-icon { font-size: 1.15rem; line-height: 1; }
  .back-top-label { display: inline; }
}

/* ============================================================
   滚动显现动画
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 981px) {
  /* 电脑端首屏两个按钮字略大 */
  .hero-actions .btn { font-size: 1.12rem; padding: 0.95rem 1.95rem; }
}

@media (max-width: 1280px) {
  .works-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 980px) {
  .service-groups { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  /* 手机端：一列上下排列（原规则被 .about .about-grid 压住，这里补上完整选择器） */
  .about .about-grid { grid-template-columns: 1fr; }
  .order-contact { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
  .stat:nth-child(2)::after { display: none; }
  .stat:nth-child(2) { border-right: none; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed; top: 76px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.6rem clamp(1.5rem, 4vw, 4rem) 1.4rem;
    transform: translateY(-110%);
    transition: transform 0.45s var(--ease-out);
    visibility: hidden;
  }
  .nav-links.is-open { transform: none; visibility: visible; }
  .nav-links a { padding: 0.85rem 0; font-size: 1.02rem; border-bottom: 1px solid var(--line); }
  .nav-links .nav-cta { margin-top: 1rem; text-align: center; border-bottom: none; }
  .nav-toggle { display: flex; }

  .hero { padding-top: 130px; }
  /* 手机端：首屏标题收小一档，减少行数 */
  .hero-title { font-size: clamp(1.4rem, 5.9vw, 1.6rem); line-height: 1.45; }
  /* 手机端：首屏标签仍是「一个大底色框 + 竖排三行」，框加宽、字再大一号 */
  .hero-kicker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.26rem;
    letter-spacing: 0.1em;
    padding: 1.05rem 2.6rem;
    border-radius: 20px;
  }
  .hero-kicker::before { display: none; }
  .hero-kicker .k-dot { display: inline-block; vertical-align: 0.18em; margin-right: 0.4em; }
  .hero-kicker span { white-space: nowrap; }
  /* 手机端：首屏两个按钮并排一行；宽度跟着字数走 —— 去掉定宽，左右留白相等，字多就宽、字少就窄 */
  .hero-actions { flex-wrap: nowrap; gap: 0.5rem; margin-bottom: clamp(1.8rem, 3vw, 3.4rem); }
  .hero-actions .btn {
    flex: 0 0 auto;
    width: auto;
    min-width: 0;
    justify-content: center;
    font-size: 0.96rem;
    white-space: nowrap;
  }
  .hero-actions .btn-primary { padding: 1.05rem 1.5rem; }  /* 左右各 24px → 实测 164.3px 宽 */
  .hero-actions .btn-ghost { padding: 0.95rem 1.5rem; }    /* 描边 1.5px 占高，竖向收 0.1rem 让两框等高 → 实测 111.5px 宽 */
  .hero-meta { gap: 0.4rem 1.1rem; }

  .works-grid { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 2rem; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .service-foot { flex-direction: column; align-items: flex-start; }
  .order-contact { grid-template-columns: 1fr 1fr; }
  .footer-top { flex-direction: column; }
  .footer-bottom { flex-direction: column; }
  /* 手机端右下角有悬浮「顶部」按钮（fixed，占底部约 22~68px）→ 主体名与备案号
     各占一行，行尾就不会被按钮压住；同时保证备案号整体不断开、读得完整 */
  .footer-legal { display: flex; flex-direction: column; }
  .footer-legal .legal-icp::before { content: ""; }
}

@media (max-width: 440px) {
  .order-contact { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  /* 小屏（<440px）：按钮宽度同样「跟着字数走」，字号与留白跟 720 档保持一致
     （否则真机 390px 会被这里的老规则盖掉，比预览小一档、又被拉成一样宽） */
  .hero-actions { flex-wrap: nowrap; gap: 0.5rem; }
  .hero-actions .btn { flex: 0 0 auto; width: auto; min-width: 0; justify-content: center; font-size: 0.96rem; white-space: nowrap; }
  .hero-actions .btn-primary { padding: 1.05rem 1.5rem; }
  .hero-actions .btn-ghost { padding: 0.95rem 1.5rem; }
}

@media (max-width: 340px) {
  /* 极窄屏（<=340px）：按钮行 283.8px + 标签框 276px 会超出可用宽，留白收窄一档防溢出 */
  .hero-actions .btn-primary { padding-left: 1.05rem; padding-right: 1.05rem; }
  .hero-actions .btn-ghost { padding-left: 1.05rem; padding-right: 1.05rem; }
  .hero-kicker { font-size: 1.18rem; padding: 1rem 1.4rem; }
}

/* ============================================================
   案例详情弹窗
   ============================================================ */
.work-card { cursor: pointer; }

.work-modal {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: clamp(0.8rem, 3vw, 2.6rem);
  visibility: hidden; opacity: 0;
  transition: opacity 0.35s var(--ease-out), visibility 0.35s;
}
.work-modal.is-open { visibility: visible; opacity: 1; }

.work-modal-mask {
  position: absolute; inset: 0;
  background: rgba(27, 26, 22, 0.62);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.work-modal-dialog {
  position: relative;
  width: min(1060px, 100%);
  max-height: min(92vh, 900px);
  display: flex; flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: 0 60px 120px -40px rgba(27, 26, 22, 0.5);
  transform: translateY(26px) scale(0.97);
  transition: transform 0.4s var(--ease-out);
  overflow: hidden;
}
.work-modal.is-open .work-modal-dialog { transform: none; }

.work-modal-close {
  position: absolute; top: 0.9rem; right: 0.9rem; z-index: 5;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  font-size: 1.35rem; line-height: 1;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}
.work-modal-close:hover { background: var(--ink); color: var(--paper); transform: rotate(90deg); }

.work-modal-grid {
  display: grid; grid-template-columns: 1.15fr 1fr;
  overflow-y: auto;
  max-height: min(92vh, 900px);
}
.work-modal-figure {
  background: var(--mist);
  border-right: 1px solid var(--line);
  aspect-ratio: 1477 / 886;
  align-self: start;
  display: grid; place-items: center;
}
.work-modal-figure img {
  display: block;
  width: 100%; height: 100%;
  object-fit: contain;
}
.work-modal-info {
  padding: clamp(1.6rem, 3vw, 2.6rem);
  display: flex; flex-direction: column;
}
.work-modal-info h3 {
  font-family: var(--font-serif); font-weight: 900;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  color: var(--ink);
  margin: 0.6rem 0 0.9rem;
}
.work-modal-desc {
  font-size: clamp(0.95rem, 1.05vw, 1.05rem);
  color: var(--ink-soft); line-height: 1.85;
  margin-bottom: 1rem;
}
.work-modal-year {
  font-size: 0.8rem; color: var(--ink-faint);
  letter-spacing: 0.08em;
  padding-bottom: 1.4rem;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 1.4rem;
}
.work-modal-cta p {
  font-size: 0.88rem; color: var(--ink-soft);
  margin-bottom: 0.9rem;
}
.work-modal-cta .btn { text-decoration: none; }

.work-modal-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 4;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 10px 26px -12px rgba(27, 26, 22, 0.4);
  transition: background 0.3s, color 0.3s;
}
.work-modal-nav:hover { background: var(--yellow); color: var(--ink); }
.work-modal-prev { left: clamp(0.4rem, 1.2vw, 1.1rem); }
.work-modal-next { right: clamp(0.4rem, 1.2vw, 1.1rem); }

.work-modal-counter {
  position: absolute; left: 50%; bottom: 0.85rem; transform: translateX(-50%);
  z-index: 4;
  font-size: 0.75rem; letter-spacing: 0.16em;
  color: var(--ink-faint);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.22rem 0.95rem;
  pointer-events: none;
}

@media (max-width: 780px) {
  .work-modal { padding: 0.6rem; align-items: stretch; }
  .work-modal-dialog { max-height: 100%; }
  .work-modal-grid { grid-template-columns: 1fr; }
  .work-modal-figure { border-right: none; border-bottom: 1px solid var(--line); }
  .work-modal-figure img { min-height: 220px; max-height: 46vh; }
  .work-modal-info { padding: 1.3rem 1.2rem 3rem; }
  .work-modal-nav { top: auto; bottom: 0.7rem; transform: none; width: 42px; height: 42px; }
  .work-modal-prev { left: 0.6rem; }
  .work-modal-next { right: 0.6rem; }
  .work-modal-counter { bottom: 1.05rem; }
  .work-modal-close { top: 0.6rem; right: 0.6rem; width: 38px; height: 38px; font-size: 1.15rem; }
}

/* 弹窗底部按钮组 */
.work-modal-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }

/* ============================================================
   案例详情页（case.html）
   ============================================================ */
.case-body { background: var(--paper); }

.case-top {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.9rem clamp(1.5rem, 4vw, 4rem);
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.case-back {
  font-size: 0.92rem; font-weight: 600; color: var(--ink-soft);
  padding: 0.45rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}
.case-back:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.case-main {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding: clamp(2.4rem, 5vw, 4.2rem) clamp(1.5rem, 4vw, 3rem) clamp(3rem, 6vw, 5rem);
}

.case-kicker {
  display: flex; align-items: center; gap: 0.7rem;
  font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  margin-bottom: 1rem;
}
.case-head h1 {
  font-family: var(--font-serif); font-weight: 900;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 1.1rem;
}
.case-head .work-tags { margin-bottom: 1.3rem; }
.case-desc {
  font-size: clamp(1rem, 1.2vw, 1.12rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.85;
  margin-bottom: 1rem;
}
.case-detail {
  font-size: clamp(0.95rem, 1.05vw, 1.02rem);
  color: var(--ink-soft);
  line-height: 1.95;
  padding-bottom: clamp(1.8rem, 3.5vw, 2.8rem);
  border-bottom: 1px dashed var(--line);
  margin-bottom: clamp(1.8rem, 3.5vw, 2.8rem);
}

.case-viewer {
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: grid; place-items: center;
}
.case-viewer img {
  width: 100%;
  aspect-ratio: 1477 / 886;
  max-height: 78vh;
  object-fit: contain;
}

.case-thumbs {
  display: flex; flex-wrap: wrap; gap: 0.7rem;
  margin-top: 1.1rem;
  justify-content: center;
}
.case-thumb {
  width: 86px; height: 86px;
  border-radius: var(--r-sm);
  overflow: hidden;
  border: 2px solid var(--line);
  background: var(--mist);
  opacity: 0.75;
  transition: opacity 0.3s, border-color 0.3s, transform 0.3s;
}
.case-thumb img { width: 100%; height: 100%; object-fit: cover; }
.case-thumb:hover { opacity: 1; transform: translateY(-3px); }
.case-thumb.is-active { opacity: 1; border-color: var(--yellow); }

.case-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin-top: clamp(2.2rem, 4vw, 3.4rem);
}
.case-nav-item {
  display: flex; flex-direction: column; gap: 0.4rem;
  padding: 1.2rem 1.4rem;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: background 0.3s, transform 0.3s;
}
.case-nav-item:hover { background: var(--yellow-pale); transform: translateY(-3px); }
.case-nav-next { text-align: right; align-items: flex-end; }
.case-nav-label { font-size: 0.76rem; letter-spacing: 0.14em; color: var(--ink-faint); }
.case-nav-item b { font-family: var(--font-serif); font-size: 1rem; font-weight: 700; color: var(--ink); }

.case-cta {
  margin-top: clamp(2.6rem, 5vw, 4rem);
  text-align: center;
  background: var(--yellow-pale);
  border: 1px solid color-mix(in srgb, var(--yellow) 45%, transparent);
  border-radius: var(--r-lg);
  padding: clamp(2rem, 4vw, 3rem) clamp(1.2rem, 3vw, 2.4rem);
}
.case-cta h2 {
  font-family: var(--font-serif); font-weight: 900;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 0.7rem;
}
.case-cta p { color: var(--ink-soft); font-size: 0.95rem; margin-bottom: 1.5rem; }

.case-footer {
  text-align: center;
  padding: 1.6rem 1rem 2rem;
  font-size: 0.8rem;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
}

@media (max-width: 640px) {
  .case-top { padding: 0.7rem 1.1rem; }
  .case-top .brand-text { display: none; }
  .case-nav { grid-template-columns: 1fr; }
  .case-nav-next { text-align: left; align-items: flex-start; }
  .case-thumb { width: 68px; height: 68px; }
}