:root {
  --paper: #f3ead8;
  --paper-deep: #e5d6ba;
  --ink: #29231d;
  --ink-soft: #665a4c;
  --line: #cdbd9f;
  --red: #762d25;
  --red-dark: #552019;
  --green: #385047;
  --white: #fffdf7;
  --shadow: 0 18px 50px rgba(57, 42, 25, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea { font: inherit; }

button, label, input[type="radio"], input[type="checkbox"] { -webkit-tap-highlight-color: transparent; }

.paper-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.24;
  z-index: -1;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(112, 79, 39, 0.11) 0 0.7px, transparent 0.8px),
    radial-gradient(circle at 78% 64%, rgba(112, 79, 39, 0.08) 0 0.6px, transparent 0.7px),
    linear-gradient(90deg, rgba(255,255,255,.15), transparent 24%, rgba(91,67,39,.04) 52%, transparent 80%);
  background-size: 13px 13px, 17px 17px, 100% 100%;
}

.hero {
  color: #f8efde;
  background:
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    #302a23;
  background-size: 28px 28px;
  border-bottom: 5px solid var(--red);
}

.hero-inner, main, .progress-inner, footer { width: min(860px, calc(100% - 32px)); margin-inline: auto; }

.hero-inner { padding: 58px 0 48px; }

.eyebrow {
  margin: 0 0 12px;
  color: #bc9b70;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.title-row { display: flex; justify-content: space-between; gap: 28px; align-items: flex-start; }

h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: .03em;
}

.intro { max-width: 650px; margin: 24px 0 0; color: #d8cdbb; font-size: 16px; }

.seal, .success-seal {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 88px;
  height: 88px;
  margin-top: 6px;
  color: #e9c9ac;
  border: 3px double #9b4035;
  background: rgba(118, 45, 37, .35);
  box-shadow: inset 0 0 0 4px #302a23, inset 0 0 0 6px #9b4035;
  transform: rotate(2deg);
}

.seal span { font-size: 27px; font-weight: 700; line-height: 1.05; letter-spacing: .12em; }

.meta-row { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 30px; color: #bdb09d; font: 13px/1.4 "PingFang SC", "Microsoft YaHei", sans-serif; }

.meta-row span:not(:last-child)::after { content: "·"; margin-left: 18px; color: #7e7160; }

.meta-row .mode-chip { color: #f0d8c7; }

.progress-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 10px 0;
  background: rgba(243, 234, 216, .94);
  border-bottom: 1px solid rgba(130, 103, 66, .18);
  backdrop-filter: blur(9px);
}

.progress-inner { display: flex; align-items: center; gap: 16px; color: var(--ink-soft); font: 12px/1.3 "PingFang SC", "Microsoft YaHei", sans-serif; }

.progress-inner > span { min-width: 94px; }

.progress-track { flex: 1; height: 4px; overflow: hidden; background: #d8c9ae; }

#progress-bar { width: 0; height: 100%; background: var(--red); transition: width .25s ease; }

main { padding: 42px 0 72px; }

.form-section {
  margin-bottom: 34px;
  overflow: hidden;
  background: rgba(255, 253, 247, .58);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 28px;
  color: #f8efde;
  background: var(--green);
}

.section-index {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(248, 239, 222, .6);
  font-size: 18px;
}

.section-heading p { margin: 0 0 1px; color: #c4d0c8; font: 11px/1.2 "PingFang SC", "Microsoft YaHei", sans-serif; letter-spacing: .18em; }

.section-heading h2 { margin: 0; font-size: 24px; font-weight: 600; letter-spacing: .08em; }

.question {
  min-width: 0;
  margin: 0;
  padding: 30px 28px 32px;
  border: 0;
  border-bottom: 1px dashed var(--line);
}

.question:last-child { border-bottom: 0; }

.question legend, .text-question {
  display: block;
  width: 100%;
  margin: 0 0 18px;
  padding: 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.55;
}

.question legend em {
  margin-left: 10px;
  color: var(--red);
  font: 600 11px/1.3 "PingFang SC", "Microsoft YaHei", sans-serif;
  font-style: normal;
  white-space: nowrap;
}

.text-question small, .conditional label small, .file-picker small {
  color: #897967;
  font: 12px/1.4 "PingFang SC", "Microsoft YaHei", sans-serif;
}

.question-number { color: var(--red); margin-right: 8px; }

.option-grid { display: grid; gap: 10px; }

.option-grid.two-col, .option-grid.compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.option {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 11px;
  min-height: 48px;
  padding: 12px 14px;
  cursor: pointer;
  background: rgba(255, 253, 247, .72);
  border: 1px solid #d9ccb4;
  transition: border-color .16s ease, background .16s ease, transform .16s ease;
}

.option:hover { border-color: #9f8b6c; background: var(--white); }

.option:has(input:checked) { border-color: var(--red); background: #f2e2d2; }

.option:has(input:focus-visible) { outline: 3px solid rgba(118, 45, 37, .22); outline-offset: 2px; }

.option:has(input:disabled) { opacity: .48; cursor: not-allowed; }

.option input {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  margin: 3px 0 0;
  accent-color: var(--red);
}

.option span { font: 14px/1.6 "PingFang SC", "Microsoft YaHei", sans-serif; }

.conditional {
  margin-top: 16px;
  padding: 18px;
  background: rgba(229, 214, 186, .42);
  border-left: 3px solid var(--red);
}

.conditional.nested { padding: 20px; }

.conditional fieldset { min-width: 0; margin: 0 0 20px; padding: 0; border: 0; }

.conditional fieldset legend { font-size: 15px; margin-bottom: 12px; }

.conditional > label, .file-picker > span { display: block; margin-bottom: 9px; font: 600 14px/1.55 "PingFang SC", "Microsoft YaHei", sans-serif; }

input[type="text"], textarea {
  width: 100%;
  color: var(--ink);
  background: rgba(255, 253, 247, .84);
  border: 1px solid #c8b797;
  border-radius: 0;
  outline: 0;
  font: 14px/1.7 "PingFang SC", "Microsoft YaHei", sans-serif;
}

input[type="text"] { height: 48px; padding: 0 13px; }

textarea { min-height: 112px; padding: 11px 13px; resize: vertical; }

input[type="text"]:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(118, 45, 37, .12); }

::placeholder { color: #998c7a; opacity: 1; }

.question-note { margin: -8px 0 14px; color: var(--ink-soft); font: 13px/1.6 "PingFang SC", "Microsoft YaHei", sans-serif; }

.field-error { display: none; margin: 10px 0 0; color: #9d251c; font: 600 13px/1.45 "PingFang SC", "Microsoft YaHei", sans-serif; }

.question.invalid .field-error { display: block; }

.conditional fieldset.invalid .field-error { display: block; }

.question.invalid { box-shadow: inset 3px 0 #a52d22; }

.selection-count { margin: -8px 0 12px; color: var(--ink-soft); font: 13px/1.4 "PingFang SC", "Microsoft YaHei", sans-serif; }

.selection-count strong { color: var(--red); }

.file-picker { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 15px; cursor: pointer; }

.file-picker > span { margin: 0; }

.file-picker strong { flex: 0 0 auto; padding: 8px 13px; color: var(--red); background: var(--white); border: 1px solid #b89e7a; font: 600 13px/1.3 "PingFang SC", "Microsoft YaHei", sans-serif; }

.submit-card, .success-card {
  padding: 34px;
  text-align: center;
  color: #eee3d0;
  background: #302a23;
  border-top: 4px solid var(--red);
  box-shadow: var(--shadow);
}

.submit-card p { max-width: 650px; margin: 0 auto 22px; color: #bfb3a1; font: 12px/1.8 "PingFang SC", "Microsoft YaHei", sans-serif; }

#submit-button {
  min-width: min(100%, 300px);
  padding: 15px 24px;
  cursor: pointer;
  color: #fff8ed;
  background: var(--red);
  border: 1px solid #b86556;
  box-shadow: inset 0 0 0 3px var(--red), inset 0 0 0 4px rgba(255,255,255,.25);
  font-weight: 700;
  letter-spacing: .12em;
}

#submit-button:hover { background: var(--red-dark); }

#submit-button:focus-visible { outline: 3px solid #d8b98e; outline-offset: 3px; }

#submit-button:disabled { opacity: .62; cursor: wait; }

.submit-status { min-height: 20px; margin: 14px auto 0 !important; color: #f1c1b5 !important; font-size: 13px !important; }

.success-card { padding: 55px 34px; }

.success-seal { width: 70px; height: 70px; margin: 0 auto 24px; color: #efcaba; font-size: 17px; font-weight: 700; }

.success-card h2 { margin: 0 0 12px; font-size: 27px; }

.success-card > p:last-child { max-width: 540px; margin: 0 auto; color: #c8bcaa; }

footer { padding: 0 0 42px; text-align: center; color: #867763; font-size: 12px; letter-spacing: .1em; }

[hidden] { display: none !important; }

.honeypot { position: absolute !important; left: -9999px !important; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .hero-inner { padding: 38px 0 34px; }
  .seal { width: 68px; height: 68px; }
  .seal span { font-size: 21px; }
  .intro { font-size: 14px; }
  .progress-inner > span { min-width: 76px; }
  main { padding-top: 26px; }
  .section-heading { padding: 18px 19px; }
  .question { padding: 25px 19px 27px; }
  .question legend, .text-question { font-size: 16px; }
  .option-grid.two-col, .option-grid.compact { grid-template-columns: 1fr; }
  .conditional { padding: 15px; }
  .file-picker { align-items: flex-start; flex-direction: column; }
  .submit-card { padding: 29px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}