:root {
  --ink: #17211d;
  --muted: #65716c;
  --line: #d9e0dc;
  --surface: #ffffff;
  --soft: #edf5f1;
  --jade: #176b50;
  --jade-dark: #0d4b38;
  --red: #9f3438;
  --gold: #ae8439;
  --shadow: 0 14px 40px rgba(23, 33, 29, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #f7faf8;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.6;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px clamp(18px, 4vw, 64px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--jade);
  border-radius: 50%;
  font-family: serif;
  font-size: 21px;
}
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); font-size: 11px; }
.site-header nav { display: flex; gap: 28px; font-size: 14px; }
.site-header nav a { padding: 8px 0; border-bottom: 2px solid transparent; }
.site-header nav a.active, .site-header nav a:hover { color: var(--jade); border-color: var(--jade); }
.header-action, .primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 20px;
  color: white;
  background: var(--jade);
  border: 1px solid var(--jade);
  border-radius: 5px;
  cursor: pointer;
  font-weight: 700;
}
.header-action:hover, .primary-action:hover { background: var(--jade-dark); }

main { overflow: hidden; }
.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(420px, 0.9fr);
  gap: 50px;
  align-items: end;
  padding: 58px max(24px, calc((100vw - 1320px) / 2));
  color: white;
  background: #173f32;
}
.eyebrow { margin: 0 0 8px; color: var(--jade); font-size: 12px; font-weight: 800; letter-spacing: 0.08em; }
.intro-band .eyebrow { color: #8ed2b6; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 720px; margin-bottom: 14px; font-family: serif; font-size: clamp(30px, 4vw, 52px); line-height: 1.2; font-weight: 600; }
.intro-band > div > p:last-child { max-width: 680px; margin-bottom: 0; color: #d8e7e0; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 0; padding: 0; list-style: none; background: rgba(255,255,255,.18); }
.steps li { min-height: 92px; padding: 16px; background: #214f40; font-size: 13px; }
.steps span { display: block; margin-bottom: 12px; color: #8ed2b6; font-weight: 800; }

.studio-shell { max-width: 1420px; margin: 0 auto; padding: 52px 24px 72px; }
.studio-heading, .panel-title, .form-head, .canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.studio-heading h2, .submit-copy h2 { margin-bottom: 0; font-family: serif; font-size: 34px; font-weight: 600; }
.draft-actions { display: flex; gap: 8px; }
.draft-actions button, .canvas-toolbar button, .template-row button, .material-filters button {
  padding: 8px 12px;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}
.draft-actions button:hover, .canvas-toolbar button:hover, .template-row button:hover { border-color: var(--jade); color: var(--jade); }
.setup-bar {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 26px;
  padding: 16px 20px;
  background: white;
  border: 1px solid var(--line);
}
.setup-bar label { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 700; }
.setup-bar select, .submit-form select, .submit-form input, .submit-form textarea {
  padding: 10px 12px;
  color: var(--ink);
  background: white;
  border: 1px solid #bdc8c2;
  border-radius: 4px;
}
.setup-bar fieldset { display: flex; gap: 14px; margin: 0; padding: 0; border: 0; }
.setup-bar legend { float: left; margin-right: 14px; font-size: 14px; font-weight: 700; }
.setup-bar p { margin: 0 0 0 auto; color: var(--jade); font-size: 13px; font-weight: 700; }
.template-row { display: flex; align-items: center; gap: 8px; padding: 18px 0; overflow-x: auto; }
.template-row > span { flex: 0 0 auto; margin-right: 6px; color: var(--muted); font-size: 13px; }
.template-row button { flex: 0 0 auto; }

.studio-grid { display: grid; grid-template-columns: 310px minmax(420px, 1fr) 280px; min-height: 620px; background: white; border: 1px solid var(--line); box-shadow: var(--shadow); }
.material-panel, .price-panel { padding: 24px; }
.material-panel { border-right: 1px solid var(--line); }
.price-panel { border-left: 1px solid var(--line); }
.panel-title h3, .price-panel h3 { margin-bottom: 0; font-size: 20px; }
.panel-title > span { color: var(--muted); font-size: 12px; }
.material-filters { display: flex; gap: 6px; margin: 18px 0; }
.material-filters button.active { color: white; background: var(--jade); border-color: var(--jade); }
.material-list { display: grid; gap: 8px; max-height: 510px; overflow-y: auto; padding-right: 4px; }
.material-card {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 10px;
  text-align: left;
  background: white;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}
.material-card:hover { border-color: var(--jade); background: var(--soft); }
.material-card:disabled { cursor: not-allowed; opacity: .45; }
.material-card strong, .material-card small { display: block; }
.material-card small { color: var(--muted); font-size: 11px; }
.material-card b { color: var(--red); font-size: 13px; }
.swatch, .bracelet-slot.filled::before {
  background: radial-gradient(circle at 32% 25%, var(--bead-accent), var(--bead-color) 50%, #24312c 130%);
  border: 1px solid rgba(23,33,29,.22);
  box-shadow: inset -3px -4px 7px rgba(0,0,0,.16), inset 3px 3px 5px rgba(255,255,255,.32), 0 2px 5px rgba(0,0,0,.14);
}
.swatch { width: 38px; height: 38px; border-radius: 50%; }
.loading { color: var(--muted); font-size: 13px; }

.canvas-panel { min-width: 0; background: #f6f9f7; }
.canvas-toolbar { min-height: 60px; padding: 10px 20px; border-bottom: 1px solid var(--line); }
.canvas-toolbar > span { font-size: 13px; font-weight: 800; }
.canvas-toolbar > div { display: flex; gap: 6px; }
.bracelet-stage { position: relative; min-height: 480px; display: grid; place-items: center; overflow: hidden; }
.bracelet-stage::before { content: ""; position: absolute; width: min(66%, 330px); aspect-ratio: 1; border: 1px dashed #bdcac3; border-radius: 50%; }
.bracelet-canvas { position: relative; width: min(76%, 400px); aspect-ratio: 1; }
.bracelet-slot {
  position: absolute;
  width: clamp(27px, 3.7vw, 38px);
  aspect-ratio: 1;
  padding: 0;
  background: #e4ebe7;
  border: 1px dashed #aab7b0;
  border-radius: 50%;
  cursor: pointer;
  transform: translate(-50%, -50%);
}
.bracelet-slot.filled { background: transparent; border: 0; }
.bracelet-slot.filled::before { content: ""; position: absolute; inset: 0; border-radius: 50%; }
.bracelet-slot.dragging { opacity: .35; }
.bracelet-slot.drop-target::after { content: ""; position: absolute; inset: -4px; border: 2px solid var(--jade); border-radius: 50%; }
.canvas-center { position: absolute; display: grid; place-items: center; color: var(--muted); pointer-events: none; }
.canvas-center strong { color: var(--jade); font-family: serif; font-size: 24px; }
.canvas-center span { font-size: 12px; }
.canvas-note { padding: 0 24px 20px; margin: 0; color: var(--muted); font-size: 12px; text-align: center; }
.estimate { margin: 16px 0 20px; color: var(--red); font-family: serif; font-size: 38px; font-weight: 700; }
.price-breakdown { margin: 0; }
.price-breakdown div { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.price-breakdown dd { margin: 0; font-weight: 700; }
.design-alert { margin: 18px 0; padding: 12px; color: #735b22; background: #fff8df; border-left: 3px solid #d1a63c; font-size: 12px; }
.design-alert.complete { color: var(--jade-dark); background: var(--soft); border-color: var(--jade); }
.estimate-note { color: var(--muted); font-size: 12px; }
.price-panel .primary-action { width: 100%; }

.submit-section { display: grid; grid-template-columns: 1fr minmax(420px, 560px); gap: 80px; padding: 72px max(24px, calc((100vw - 1200px) / 2)); background: white; border-top: 1px solid var(--line); }
.submit-copy ol { display: grid; gap: 18px; margin: 30px 0 0; padding: 0; list-style: none; }
.submit-copy li { display: grid; grid-template-columns: 110px 1fr; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.submit-copy li span { color: var(--muted); }
.submit-form { display: grid; gap: 15px; padding: 28px; background: #f5f9f7; border: 1px solid var(--line); }
.form-head h3 { margin: 0; font-size: 22px; }
.form-head span { color: var(--jade); font-size: 12px; font-weight: 700; }
.submit-form > label { display: grid; gap: 6px; font-size: 13px; font-weight: 700; }
.submit-form textarea { min-height: 100px; resize: vertical; }
.submit-form .consent { display: flex; grid-template-columns: none; align-items: flex-start; color: var(--muted); font-size: 12px; font-weight: 400; }
.consent input { margin-top: 4px; }
.submit-form button { width: 100%; }
.form-message { min-height: 24px; margin: 0; color: var(--red); font-size: 13px; }
.quality-strip { display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1200px; margin: 0 auto; padding: 48px 24px 70px; }
.quality-strip div { padding: 0 24px; border-right: 1px solid var(--line); }
.quality-strip div:last-child { border-right: 0; }
.quality-strip strong, .quality-strip span { display: block; }
.quality-strip span { margin-top: 4px; color: var(--muted); font-size: 12px; }

dialog { width: min(520px, calc(100% - 32px)); padding: 34px; border: 0; border-radius: 6px; box-shadow: 0 24px 80px rgba(0,0,0,.24); }
dialog::backdrop { background: rgba(12, 26, 20, .58); }
.dialog-close { position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; background: transparent; border: 0; font-size: 24px; cursor: pointer; }
.design-number { display: block; margin: 22px 0; padding: 13px; color: var(--jade-dark); background: var(--soft); text-align: center; }
.dialog-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dialog-actions button, .dialog-actions > a:not(.primary-action) { min-height: 42px; padding: 9px 14px; color: var(--ink); background: white; border: 1px solid var(--line); border-radius: 5px; cursor: pointer; }
.consent { display: flex !important; align-items: flex-start; gap: 9px; font-size: 12px; line-height: 1.55; }
.consent input { flex: 0 0 auto; width: 16px; height: 16px; margin-top: 2px; }
.consent a, .privacy-footer a { color: var(--jade-dark); text-decoration: underline; text-underline-offset: 2px; }
.privacy-footer { margin: 0; padding: 18px 20px; color: var(--muted); background: #f5f9f7; text-align: center; font-size: 12px; }

@media (max-width: 1100px) {
  .intro-band { grid-template-columns: 1fr; }
  .studio-grid { grid-template-columns: 280px 1fr; }
  .price-panel { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 30px; border-top: 1px solid var(--line); border-left: 0; }
  .price-panel .eyebrow, .price-panel h3 { grid-column: 1; }
  .price-panel .estimate { grid-column: 1; }
  .price-breakdown { grid-column: 2; grid-row: 1 / span 3; }
  .price-panel .primary-action { width: max-content; }
}

@media (max-width: 760px) {
  .site-header { min-height: 62px; padding: 8px 16px; }
  .site-header nav, .header-action { display: none; }
  .intro-band { padding: 38px 20px; }
  h1 { font-size: 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .studio-shell { padding: 36px 12px 48px; }
  .studio-heading { align-items: flex-end; }
  .studio-heading h2, .submit-copy h2 { font-size: 28px; }
  .draft-actions { flex-direction: column; }
  .draft-actions button { padding: 6px 9px; font-size: 12px; }
  .setup-bar { align-items: flex-start; flex-wrap: wrap; gap: 14px 22px; padding: 14px; }
  .setup-bar p { width: 100%; margin: 0; }
  .studio-grid { display: flex; flex-direction: column; }
  .canvas-panel { order: 1; }
  .material-panel { order: 2; border-top: 1px solid var(--line); border-right: 0; }
  .price-panel { order: 3; display: block; }
  .material-list { grid-template-columns: repeat(2, minmax(0, 1fr)); max-height: 390px; }
  .material-card { grid-template-columns: 34px 1fr; }
  .material-card b { grid-column: 2; }
  .swatch { width: 32px; height: 32px; }
  .canvas-toolbar { align-items: flex-start; flex-direction: column; }
  .canvas-toolbar > div { width: 100%; overflow-x: auto; }
  .bracelet-stage { min-height: 380px; }
  .bracelet-canvas { width: min(92%, 350px); }
  .bracelet-slot { width: 28px; }
  .submit-section { grid-template-columns: 1fr; gap: 36px; padding: 52px 16px; }
  .submit-form { padding: 20px 16px; }
  .quality-strip { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .quality-strip div:nth-child(2) { border-right: 0; }
}

@media (max-width: 420px) {
  .material-list { grid-template-columns: 1fr; }
  .bracelet-stage { min-height: 330px; }
  .bracelet-canvas { width: 290px; }
  .bracelet-slot { width: 25px; }
  .submit-copy li { grid-template-columns: 1fr; gap: 4px; }
}