/* ==========================================================================
   星欧娱乐 XINGOU ｜ 纸样打版风设计系统（Pattern-Paper Design System）
   --------------------------------------------------------------------------
   概念：整站即一张服装打版纸——浅灰蓝「裁床单」底、白「裁片」纸样卡、
   红色「剪线」走遍全站、左侧「放缝标尺」竖排章节号、等宽「规格尺码表」。
   零图片、零外链字体，所有视觉由 CSS 渲染。
   ========================================================================== */

/* ---------- 0. 变量 ---------- */
:root {
  --bed:      #e5e9ee;  /* 裁床单底 */
  --bed-deep: #d7dee6;  /* 底纹深一档 */
  --paper:    #fdfdfb;  /* 裁片纸 */
  --ink:      #1b1e24;  /* 版师墨 */
  --ink-2:    #4a5058;  /* 次级 */
  --ink-3:    #7b828b;  /* 辅助 */
  --line:     #b9c2cc;  /* 格线 */
  --line-soft:#cad2da;
  --red:      #c8341f;  /* 剪线红 */
  --red-deep: #9c2716;
  --blue:     #2f5a8f;  /* 制图蓝 */
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --serif: "Noto Serif SC", "Source Han Serif SC", Songti SC, SimSun, serif;
  --mono:  Consolas, "SF Mono", "Courier New", monospace;
  --wrap:  1180px;
  --hair:  1px solid var(--line);
}

/* ---------- 1. 基底与重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--bed);
  /* 打版网格 + 45° 斜放缝线 */
  background-image:
    repeating-linear-gradient(45deg, transparent 0 119px, rgba(185,194,204,.32) 119px 120px),
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 100% 100%, 24px 24px, 24px 24px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--red); }
h1, h2, h3, h4 { margin: 0 0 .6em; line-height: 1.3; letter-spacing: .01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 2px dashed var(--red); outline-offset: 3px; }

/* ---------- 2. 布局 ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.section { padding: 84px 0; }
.section--tight { padding: 56px 0; }
.grid { display: grid; gap: 26px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

/* 章节头：左标尺号 + 右标题（打版页边结构） */
.sec-head { display: flex; align-items: stretch; gap: 26px; margin-bottom: 44px; }
.sec-ruler {
  flex: 0 0 62px; position: relative;
  background: var(--paper); border: 2px solid var(--ink);
  writing-mode: vertical-rl; text-orientation: upright;
  display: flex; align-items: center; justify-content: center;
  font: 700 1.05rem var(--mono); letter-spacing: .3em; color: var(--red);
  /* 左侧刻度齿 */
  background-image: repeating-linear-gradient(0deg, var(--ink) 0 2px, transparent 2px 12px);
  background-size: 8px 100%; background-position: 4px 0; background-repeat: no-repeat;
  padding-left: 14px;
}
.sec-en {
  font: 600 .68rem var(--mono); letter-spacing: .28em; text-transform: uppercase;
  color: var(--red); margin-bottom: 8px;
}
.sec-title { font-size: clamp(1.5rem, 3vw, 2.15rem); font-weight: 800; }
.sec-lead { max-width: 640px; color: var(--ink-2); margin-top: -1.2em; }

/* ---------- 3. 顶部织带跑马（剪线） ---------- */
.cutband {
  background: var(--red); color: #fff; overflow: hidden; white-space: nowrap;
  font: 600 .74rem var(--mono); letter-spacing: .22em; padding: 7px 0;
}
.cutband-run { display: inline-block; animation: run 26s linear infinite; }
.cutband-run span { padding: 0 28px; }
@keyframes run { to { transform: translateX(-50%); } }

/* ---------- 4. 页头 ---------- */
.hdr {
  position: sticky; top: 0; z-index: 50;
  background: rgba(253,253,251,.94); backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--ink);
}
.hdr-in { display: flex; align-items: center; gap: 34px; height: 66px; position: relative; }
.brand { display: flex; align-items: baseline; gap: 10px; color: var(--ink); font-weight: 800; font-size: 1.18rem; }
.brand:hover { color: var(--ink); }
.brand .en { font: 600 .62rem var(--mono); letter-spacing: .3em; color: var(--red); text-transform: uppercase; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  position: relative; padding: 8px 13px; color: var(--ink-2); font-size: .95rem;
  border: 1px dashed transparent;
}
.nav a:hover { color: var(--red); border-color: var(--red); }
.nav a.is-on { color: var(--ink); font-weight: 700; }
.nav a.is-on::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px;
  border-bottom: 2px dashed var(--red);
}
.btn-login {
  font: 600 .9rem var(--sans); color: var(--paper); background: var(--ink);
  border: 2px solid var(--ink); padding: 8px 18px; cursor: pointer;
}
.btn-login:hover { background: var(--red); border-color: var(--red); transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--ink); }
.nav-toggle { display: none; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-block; font-weight: 700; font-size: .95rem;
  padding: 12px 26px; border: 2px solid var(--ink); color: var(--ink);
  background: var(--paper); cursor: pointer;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--ink); color: var(--ink); }
.btn--red { background: var(--red); border-color: var(--red-deep); color: #fff; }
.btn--red:hover { box-shadow: 5px 5px 0 var(--ink); color: #fff; }
.btn--ghost { border-style: dashed; background: transparent; }

/* ---------- 6. 裁片纸样卡 ---------- */
.piece {
  position: relative; background: var(--paper);
  border: 2px solid var(--ink); border-radius: 46% 46% 6px 6px / 30px 30px 6px 6px;
  padding: 30px 26px 26px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.piece:hover { transform: translate(-3px, -3px); box-shadow: 7px 7px 0 rgba(27,30,36,.16); }
/* 刀口 notch：顶边红色半圆缺口 */
.piece::before {
  content: ""; position: absolute; top: -7px; left: 50%; margin-left: -7px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bed); border: 2px solid var(--red); 
}
/* 钻孔 drill hole */
.piece::after {
  content: ""; position: absolute; top: 16px; left: 50%; margin-left: -3.5px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--ink);
}
.piece-no {
  font: 600 .64rem var(--mono); letter-spacing: .24em; color: var(--red);
  text-transform: uppercase; margin: 6px 0 10px; text-align: center;
}
.piece h3 { text-align: center; font-size: 1.12rem; }
.piece p { color: var(--ink-2); font-size: .92rem; }
.piece ul li {
  font-size: .88rem; color: var(--ink-2); padding: 6px 0 6px 18px; position: relative;
  border-top: 1px dashed var(--line);
}
.piece ul li::before { content: "✚"; position: absolute; left: 0; color: var(--red); font-size: .7rem; top: 8px; }

/* 方形裁片（不需要圆肩时用） */
.piece--flat { border-radius: 6px; }
.piece--flat::before { border-radius: 2px; width: 20px; height: 6px; margin-left: -10px; top: -4px; background: var(--paper); }

/* ---------- 7. 剪线分隔（虚线 + ✂ 走线） ---------- */
.cutline { position: relative; border: 0; border-top: 2px dashed var(--red); margin: 0; }
.cutline::after {
  content: "✂"; position: absolute; top: -14px; left: var(--x, 12%);
  color: var(--red); background: var(--bed); padding: 0 6px; font-size: 1rem;
}

/* ---------- 8. 规格尺码表（工艺单） ---------- */
.sheet { width: 100%; border-collapse: collapse; background: var(--paper); border: 2px solid var(--ink); font-size: .92rem; }
.sheet caption {
  caption-side: top; text-align: left; padding: 0 0 8px 2px;
  font: 600 .68rem var(--mono); letter-spacing: .22em; text-transform: uppercase; color: var(--red);
}
.sheet th, .sheet td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; vertical-align: top; }
.sheet thead th { background: var(--ink); color: var(--paper); font-weight: 600; letter-spacing: .05em; border-color: var(--ink-2); }
.sheet tbody th {
  font: 600 .82rem var(--mono); letter-spacing: .1em; color: var(--ink);
  background: var(--bed-deep); white-space: nowrap; width: 148px;
}
.sheet tbody tr:hover td { background: #f4f2ea; }

/* ---------- 9. 工序步（打版工序单） ---------- */
.steps { counter-reset: st; display: grid; gap: 0; border: 2px solid var(--ink); background: var(--paper); }
.step {
  counter-increment: st; display: grid; grid-template-columns: 96px 1fr; gap: 22px;
  padding: 24px 28px; border-top: 1px dashed var(--line);
}
.step:first-child { border-top: 0; }
.step::before {
  content: "P" counter(st, "01");
  font: 700 1.05rem var(--mono); color: var(--red); letter-spacing: .08em;
  padding-top: 4px; border-right: 2px dashed var(--line); 
}
.step h3 { font-size: 1.05rem; margin-bottom: .35em; }
.step p { color: var(--ink-2); font-size: .92rem; margin: 0; }

/* ---------- 10. 标签与数据 ---------- */
.chip {
  display: inline-block; font: 600 .68rem var(--mono); letter-spacing: .16em;
  color: var(--blue); border: 1px dashed var(--blue); padding: 3px 10px; margin: 0 6px 6px 0;
  text-transform: uppercase;
}
.chip--red { color: var(--red); border-color: var(--red); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 2px solid var(--ink); background: var(--paper); }
.stat { padding: 26px 18px; text-align: center; border-left: 1px dashed var(--line); }
.stat:first-child { border-left: 0; }
.stat b { display: block; font: 800 2rem var(--mono); color: var(--red); line-height: 1.1; }
.stat span { font-size: .82rem; color: var(--ink-2); }

/* ---------- 11. Hero ---------- */
.hero { padding: 88px 0 70px; position: relative; }
.hero-grid { display: grid; grid-template-columns: 7fr 5fr; gap: 52px; align-items: center; }
.hero-kicker {
  font: 600 .72rem var(--mono); letter-spacing: .3em; color: var(--red);
  text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 800; line-height: 1.22; }
.hero h1 em { font-style: normal; color: var(--red); }
.hero-sub { color: var(--ink-2); max-width: 520px; font-size: 1.02rem; }
.hero-cta { display: flex; gap: 16px; margin-top: 30px; flex-wrap: wrap; }
.hero-note { margin-top: 22px; font: .74rem var(--mono); color: var(--ink-3); letter-spacing: .08em; }
/* Hero 右侧：大裁片 + 尺寸标注 */
.plot { position: relative; min-height: 360px; }
.plot .piece { position: absolute; inset: 8% 6% 12% 10%; padding: 46px 34px; }
.plot .piece-under { position: absolute; inset: 0 0 24% 26%; z-index: -1; transform: rotate(4deg); background: var(--bed-deep); border: 2px dashed var(--ink); padding: 0; }
.dim { position: absolute; font: 600 .66rem var(--mono); color: var(--blue); letter-spacing: .12em; }
.dim--w { bottom: 2%; left: 10%; right: 6%; border-bottom: 1px solid var(--blue); }
.dim--w::before, .dim--w::after { content: "│"; position: absolute; bottom: -6px; }
.dim--w::before { left: -2px; } .dim--w::after { right: -2px; }
.dim--w span { position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%); background: var(--bed); padding: 0 8px; }
.dim--h { top: 10%; bottom: 16%; right: -2%; border-right: 1px solid var(--blue); }
.dim--h span { position: absolute; top: 50%; right: 2px; transform: translateY(-50%) rotate(90deg); background: var(--bed); padding: 0 8px; }

/* ---------- 12. 织带列表（案例/文章通用条目） ---------- */
.reel { display: grid; gap: 14px; }
.reel-item {
  display: grid; grid-template-columns: 78px 1fr auto; gap: 24px; align-items: center;
  background: var(--paper); border: 2px solid var(--ink); padding: 20px 26px;
  transition: transform .16s ease, box-shadow .16s ease;
}
.reel-item:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 rgba(27,30,36,.14); }
.reel-no { font: 800 1.5rem var(--mono); color: var(--red); border-right: 2px dashed var(--line); padding-right: 16px; }
.reel-item h3 { margin: 0 0 4px; font-size: 1.08rem; }
.reel-item p { margin: 0; font-size: .88rem; color: var(--ink-2); }
.reel-tag { font: 600 .66rem var(--mono); letter-spacing: .18em; color: var(--ink-3); writing-mode: vertical-rl; text-orientation: upright; }

/* ---------- 13. FAQ 折叠 ---------- */
.faq details { background: var(--paper); border: 1px dashed var(--ink); margin-bottom: 10px; }
.faq summary {
  cursor: pointer; padding: 16px 22px; font-weight: 700; list-style: none; position: relative; padding-right: 52px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; position: absolute; right: 20px; color: var(--red); font-family: var(--mono); }
.faq details[open] summary::after { content: "－"; }
.faq details div { padding: 0 22px 18px; color: var(--ink-2); font-size: .92rem; border-top: 1px dashed var(--line); }
.faq details div p { margin-top: 12px; }

/* ---------- 14. 表单 ---------- */
.form { display: grid; gap: 14px; background: var(--paper); border: 2px solid var(--ink); padding: 30px; }
.form label { font: 600 .7rem var(--mono); letter-spacing: .18em; color: var(--ink-2); text-transform: uppercase; display: block; margin-bottom: 4px; }
.form input, .form select, .form textarea {
  width: 100%; font: .95rem var(--sans); color: var(--ink);
  padding: 11px 14px; background: #fff; border: 1px solid var(--line); border-bottom: 2px solid var(--ink);
}
.form input:focus, .form textarea:focus, .form select:focus { outline: none; border-color: var(--red); border-bottom-color: var(--red); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-note { font-size: .78rem; color: var(--ink-3); }

/* ---------- 15. 面包屑 / 页脚 ---------- */
.crumb { font: .78rem var(--mono); color: var(--ink-3); padding: 18px 0 0; }
.crumb a { color: var(--ink-3); } .crumb a:hover { color: var(--red); }
.crumb i { font-style: normal; padding: 0 8px; color: var(--red); }
.ftr { background: var(--ink); color: #cfd4da; margin-top: 90px; padding: 64px 0 0; font-size: .9rem; }
.ftr a { color: #cfd4da; } .ftr a:hover { color: #fff; }
.ftr-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.ftr h4 { color: #fff; font-size: .95rem; margin-bottom: 16px; letter-spacing: .05em; }
.ftr li { margin-bottom: 9px; }
.ftr-brand { font-size: 1.25rem; font-weight: 800; color: #fff; }
.ftr-barcode { height: 34px; margin: 18px 0; background: repeating-linear-gradient(90deg, #fff 0 2px, transparent 2px 5px, #fff 5px 6px, transparent 6px 11px, #fff 11px 14px, transparent 14px 17px); }
.ftr-legal { border-top: 1px dashed #565d66; padding: 20px 0 26px; font-size: .78rem; color: #8d949c; line-height: 2; }
.ftr-legal b { color: #dfe3e8; }

/* ---------- 16. 揭示动画 ---------- */
.rv { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
.rv.is-in { opacity: 1; transform: none; }

/* ---------- 17. 子页 Hero ---------- */
.page-hero { padding: 62px 0 48px; border-bottom: 2px dashed var(--red); }
.page-hero h1 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 800; margin-bottom: .4em; }
.page-hero p { max-width: 680px; color: var(--ink-2); }

/* 两栏文版（关于页等） */
.cols { display: grid; grid-template-columns: 7fr 5fr; gap: 52px; align-items: start; }
.prose p { color: var(--ink-2); }
.prose h3 { margin-top: 1.6em; }
.pull {
  border-left: 4px solid var(--red); background: var(--paper); padding: 20px 24px;
  font-family: var(--serif); font-size: 1.05rem; color: var(--ink); margin: 26px 0;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid, .cols { grid-template-columns: 1fr; gap: 40px; }
  .plot { min-height: 320px; }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat { border-top: 1px dashed var(--line); }
  .stat:first-child, .stat:nth-child(2) { border-top: 0; }
  .ftr-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .nav {
    display: none; position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; background: var(--paper); border-bottom: 2px solid var(--ink);
    padding: 12px 28px 18px; gap: 0; margin-left: 0;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px dashed var(--line); }
  .nav-toggle {
    display: inline-flex; margin-left: auto; align-items: center; justify-content: center;
    width: 42px; height: 42px; border: 2px solid var(--ink); background: var(--paper);
    font-size: 1.2rem; cursor: pointer; color: var(--ink);
  }
  .btn-login { display: none; }
  .reel-item { grid-template-columns: 58px 1fr; }
  .reel-tag { display: none; }
  .sheet { table-layout: fixed; }
  .sheet tbody th { white-space: normal; width: auto; }
}
@media (max-width: 640px) {
  .section { padding: 58px 0; }
  .wrap { padding: 0 18px; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .sec-ruler { flex-basis: 46px; }
  .form-row { grid-template-columns: 1fr; }
  .ftr-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .step { grid-template-columns: 66px 1fr; gap: 14px; padding: 18px; }
  .hero { padding: 56px 0 44px; }
}

/* ---------- 19. 首页左侧版线导航（spine） ---------- */
.spine {
  position: fixed; left: 22px; top: 50%; transform: translateY(-50%); z-index: 40;
  display: flex; flex-direction: column; gap: 18px; align-items: flex-start;
  padding-left: 14px; border-left: 2px dashed var(--line);
}
.spine a {
  font: 600 .62rem var(--mono); letter-spacing: .2em; color: var(--ink-3);
  text-transform: uppercase; text-decoration: none; position: relative; transition: color .15s ease;
}
.spine a::before {
  content: ""; position: absolute; left: -19px; top: 50%; width: 10px; height: 2px;
  background: transparent; transition: background .15s ease;
}
.spine a:hover { color: var(--ink); }
.spine a.is-on { color: var(--red); font-weight: 700; }
.spine a.is-on::before { background: var(--red); }
@media (max-width: 1420px) { .spine { display: none; } }

/* ---------- 20. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cutband-run { animation: none; }
  .rv { opacity: 1; transform: none; transition: none; }
  .piece:hover, .reel-item:hover, .btn:hover, .btn-login:hover { transform: none; box-shadow: none; }
}