/* ============================================================
   DSGVO- & Vertraulichkeitsschulung
   Eigenständiges Stylesheet — keine externen Abhängigkeiten.
   ============================================================ */

:root {
  --orange: #E8652A;
  --orange-dark: #CF5822;
  --orange-text: #B84A18;
  --orange-btn: #C24E1B;
  --orange-btn-hover: #A84314;
  --green: #4D8C3C;
  --green-dark: #3A6B2D;
  --green-soft: #EDF4E9;
  --ink: #1A1A18;
  --ink-2: #2E2E2A;
  --gray-700: #444440;
  --gray-500: #6E6E66;
  --gray-400: #6F6F67;
  --gray-300: #C8C8C2;
  --gray-200: #E4E4E0;
  --gray-100: #F2F2F0;
  --off-white: #F7F7F5;
  --white: #FFFFFF;
  --red: #B3261E;
  --red-soft: #FBEAE8;
  --amber: #8A5A00;
  --amber-soft: #FDF3DE;

  --font-sans: "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-cjk: "PingFang TC", "PingFang SC", "Hiragino Sans", "Microsoft YaHei", "Microsoft JhengHei", "Noto Sans CJK TC", "Noto Sans CJK SC", var(--font-sans);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(26,26,24,0.05);
  --shadow-md: 0 8px 28px rgba(26,26,24,0.08);
  --max: 1140px;
  --header-h: 72px;
  --transition: 180ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--gray-700);
  background: var(--off-white);
  -webkit-font-smoothing: antialiased;
}
html[lang="zh-Hant"] body, html[lang="zh-Hans"] body {
  font-family: var(--font-cjk);
  line-height: 1.8;
}
html[lang="zh-Hant"] h1, html[lang="zh-Hant"] h2, html[lang="zh-Hant"] h3,
html[lang="zh-Hans"] h1, html[lang="zh-Hans"] h2, html[lang="zh-Hans"] h3 {
  letter-spacing: 0;
  line-height: 1.4;
}
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 600; line-height: 1.22; letter-spacing: -0.02em; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
a { color: var(--green-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #2F5724; }
ul, ol { margin: 0 0 1em; padding-left: 1.35em; }
li { margin-bottom: 0.4em; }
li:last-child { margin-bottom: 0; }
strong { color: var(--ink); font-weight: 650; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  padding: 0.08em 0.35em;
  white-space: nowrap;
}
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }
#screenTitle:focus, #feedback:focus, .q-text:focus { outline: none; }
::selection { background: rgba(232,101,42,0.2); }

.shell { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: 24px; }

/* ---------- Skip link & header ---------- */
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 0 0 6px 6px;
  transition: top var(--transition); text-decoration: none;
}
.skip-link:focus { top: 0; color: #fff; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
}
.header-inner {
  max-width: var(--max); margin-inline: auto; padding-inline: 24px;
  height: var(--header-h); display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; }
.brand-logo { height: 34px; width: auto; flex-shrink: 0; }
.brand-divider { width: 1px; height: 22px; background: var(--gray-300); flex-shrink: 0; }
.brand-tag {
  font-size: 0.74rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--gray-500); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
html[lang="zh-Hant"] .brand-tag, html[lang="zh-Hans"] .brand-tag { letter-spacing: 0.04em; }
.lang-nav { margin-left: auto; display: flex; align-items: center; gap: 2px; flex-shrink: 0; }
.lang-btn {
  background: none; border: 0; cursor: pointer;
  min-width: 38px; min-height: 36px; padding: 4px 7px;
  border-radius: var(--radius-sm);
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.05em; color: var(--gray-500);
  transition: color var(--transition), background var(--transition);
}
.lang-btn:hover { color: var(--ink); background: var(--gray-100); }
.lang-btn[aria-pressed="true"] { color: var(--orange); background: rgba(232,101,42,0.1); }
.top-progress { height: 3px; background: var(--gray-200); }
.top-progress span { display: block; height: 100%; width: 0; background: var(--orange); transition: width 300ms ease; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 11px 22px;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 650; letter-spacing: 0.01em;
  text-decoration: none; cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--orange-btn); color: #fff; }
.btn-primary:hover { background: var(--orange-btn-hover); color: #fff; box-shadow: 0 6px 18px rgba(232,101,42,0.24); }
.btn-secondary { background: var(--green-dark); color: #fff; }
.btn-secondary:hover { background: #2F5724; color: #fff; }
.btn-ghost { background: #fff; border-color: var(--gray-300); color: var(--ink-2); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); background: #fff; }
.btn-quiet { background: transparent; border-color: transparent; color: var(--gray-500); text-decoration: underline; text-underline-offset: 3px; }
.btn-quiet:hover { color: var(--ink); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 22px; }
.linklike {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--green-dark); text-decoration: underline; text-underline-offset: 3px;
}
.linklike:hover { color: #2F5724; }

/* ---------- Start / hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(232,101,42,0.22), transparent 60%),
    radial-gradient(700px 420px at 0% 110%, rgba(77,140,60,0.25), transparent 60%),
    linear-gradient(160deg, #171714 0%, #242E22 100%);
  color: #fff;
  padding: 62px 0 54px;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 100% 34px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}
.hero-inner { position: relative; z-index: 1; max-width: 840px; }
.eyebrow {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--orange); margin-bottom: 14px;
}
.hero h1 {
  color: #fff; font-size: clamp(2rem, 5vw, 3.15rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.08; margin-bottom: 16px;
}
html[lang="zh-Hant"] .hero h1, html[lang="zh-Hans"] .hero h1 { letter-spacing: 0; line-height: 1.3; }
.hero-sub { color: rgba(255,255,255,0.74); font-size: 1.05rem; max-width: 640px; margin-bottom: 26px; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid rgba(255,255,255,0.18); background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.86); border-radius: 99px;
  padding: 5px 12px; font-size: 0.76rem; font-weight: 600;
}

.section { padding: 42px 0 56px; }
.section-tight { padding: 34px 0; }
.section-heading { font-size: 1.45rem; margin-bottom: 6px; }
.section-sub { color: var(--gray-500); font-size: 0.93rem; margin-bottom: 22px; }

/* Mode cards */
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 22px; }
.mode-card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 26px 26px 24px; box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.mode-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.mode-card.featured { border-color: rgba(77,140,60,0.5); }
.mode-card.featured::before {
  content: ""; position: absolute; inset: -1px; border-radius: var(--radius-lg);
  border-top: 3px solid var(--green); pointer-events: none;
}
.mode-tag {
  align-self: flex-start; font-size: 0.67rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--gray-500); background: var(--gray-100);
  border-radius: 99px; padding: 3px 9px; margin-bottom: 12px;
}
.mode-card.featured .mode-tag { color: var(--green-dark); background: var(--green-soft); }
html[lang="zh-Hant"] .mode-tag, html[lang="zh-Hans"] .mode-tag { letter-spacing: 0.05em; }
html[lang="zh-Hant"] .eyebrow, html[lang="zh-Hans"] .eyebrow,
html[lang="zh-Hant"] .unit-kicker, html[lang="zh-Hans"] .unit-kicker,
html[lang="zh-Hant"] .stepper-label, html[lang="zh-Hans"] .stepper-label,
html[lang="zh-Hant"] .status-badge, html[lang="zh-Hans"] .status-badge { letter-spacing: 0.05em; }
.mode-card h3 { font-size: 1.18rem; margin-bottom: 8px; }
.mode-card p { font-size: 0.9rem; color: var(--gray-500); }
.checks { list-style: none; padding: 0; margin: 16px 0 20px; }
.checks li { position: relative; padding-left: 24px; font-size: 0.85rem; color: var(--gray-700); margin-bottom: 7px; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 0.45em;
  width: 7px; height: 12px; border-right: 2px solid var(--green); border-bottom: 2px solid var(--green);
  transform: rotate(40deg);
}
.mode-card .btn { margin-top: auto; width: 100%; }

/* Learn grid */
.learn { margin-top: 44px; }
.learn-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border-top: 1px solid var(--gray-200); margin-top: 14px;
}
.learn-item {
  display: flex; gap: 12px; padding: 14px 0;
  border-bottom: 1px solid var(--gray-200); font-size: 0.88rem;
}
.learn-item:nth-child(odd) { padding-right: 22px; }
.learn-item:nth-child(even) { padding-left: 22px; border-left: 1px solid var(--gray-200); }
.learn-num { font-size: 0.7rem; font-weight: 700; color: var(--orange-text); padding-top: 3px; min-width: 18px; }

.note {
  margin-top: 28px; background: #fff; border: 1px solid var(--gray-200);
  border-left: 3px solid var(--orange); border-radius: var(--radius-sm);
  padding: 16px 18px; font-size: 0.82rem; color: var(--gray-500);
}
.note strong { display: block; color: var(--ink); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 4px; }

/* ---------- Generic card ---------- */
.card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 28px;
  box-shadow: var(--shadow-sm);
}
.screen { min-height: 60vh; padding: 34px 0 64px; }
.screen-narrow { max-width: 760px; margin-inline: auto; }
.screen-head { margin-bottom: 22px; }
.screen-head h1 { font-size: clamp(1.55rem, 3.4vw, 2.1rem); margin-bottom: 8px; }
.screen-head p { color: var(--gray-500); max-width: 660px; }
.back-link {
  display: inline-flex; align-items: center; gap: 6px; background: none; border: 0;
  padding: 4px 0; margin-bottom: 16px; cursor: pointer;
  font-size: 0.8rem; font-weight: 600; color: var(--gray-500);
}
.back-link:hover { color: var(--ink); }

/* ---------- Form ---------- */
.form-grid { display: grid; gap: 18px; }
.field label { display: block; font-size: 0.8rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.field .hint { font-size: 0.75rem; color: var(--gray-500); font-weight: 400; margin-left: 4px; }
.field input[type="text"], .field input[type="email"] {
  width: 100%; min-height: 46px; padding: 10px 13px;
  border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  font: inherit; color: var(--ink); background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(77,140,60,0.12); outline: none; }
.field input[aria-invalid="true"] { border-color: var(--red); }
.purpose {
  background: var(--off-white); border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  padding: 14px 16px; font-size: 0.82rem;
}
.purpose h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--gray-500); margin-bottom: 5px; }
.consent-box { border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 16px; background: #fff; }
.consent-row { display: flex; gap: 11px; align-items: flex-start; }
.consent-row input[type="checkbox"] { width: 19px; height: 19px; margin-top: 3px; accent-color: var(--green); flex-shrink: 0; }
.consent-row label { font-size: 0.83rem; color: var(--gray-700); line-height: 1.55; }
details.privacy { margin-top: 12px; border-top: 1px solid var(--gray-200); padding-top: 10px; }
details.privacy summary { cursor: pointer; font-size: 0.8rem; font-weight: 650; color: var(--green); }
details.privacy summary:hover { color: var(--green-dark); }
.privacy-body { padding-top: 12px; font-size: 0.8rem; color: var(--gray-500); }
.privacy-body h4 { font-size: 0.78rem; margin: 14px 0 3px; color: var(--ink); }
.privacy-body h4:first-child { margin-top: 0; }
.form-error {
  display: none; background: var(--red-soft); border: 1px solid rgba(179,38,30,0.25);
  color: var(--red); border-radius: var(--radius-sm);
  padding: 10px 13px; font-size: 0.82rem;
}
.form-error.show { display: block; }

/* ---------- Training ---------- */
.train-layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 32px; align-items: start; }
.train-layout > * { min-width: 0; }
.stepper { position: sticky; top: calc(var(--header-h) + 22px); min-width: 0; }
.stepper-label {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--gray-400); margin-bottom: 10px;
}
.step-list { list-style: none; padding: 0; margin: 0; }
.step-item { margin: 0; }
.step-btn {
  display: flex; align-items: flex-start; gap: 9px; width: 100%;
  text-align: left; background: none; border: 0; border-left: 2px solid var(--gray-200);
  padding: 8px 8px 8px 12px; cursor: pointer;
  font-size: 0.78rem; color: var(--gray-500); line-height: 1.4;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.step-btn:hover { color: var(--ink); background: rgba(255,255,255,0.6); }
.step-btn[aria-current="step"] { border-left-color: var(--orange); color: var(--ink); font-weight: 650; }
.step-btn.done { color: var(--gray-700); }
.step-dot {
  width: 17px; height: 17px; border-radius: 50%; flex-shrink: 0;
  border: 1px solid var(--gray-300); background: #fff; color: transparent;
  font-size: 0.6rem; display: inline-flex; align-items: center; justify-content: center;
  margin-top: 1px;
}
.step-btn.done .step-dot { background: var(--green); border-color: var(--green); color: #fff; }
.step-btn[aria-current="step"] .step-dot { border-color: var(--orange); background: var(--orange); color: #fff; }
.train-progress { margin-top: 18px; font-size: 0.7rem; color: var(--gray-400); }
.train-progress-bar { height: 4px; background: var(--gray-200); border-radius: 99px; overflow: hidden; margin-bottom: 6px; }
.train-progress-bar span { display: block; height: 100%; background: var(--green); border-radius: 99px; transition: width 300ms ease; }

.unit-card { padding: 34px 36px 30px; }
.unit-kicker { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; color: var(--orange-text); margin-bottom: 8px; }
.unit-card h1 { font-size: clamp(1.5rem, 3.2vw, 2rem); margin-bottom: 12px; }
.unit-lead { font-size: 1rem; color: var(--gray-500); border-bottom: 1px solid var(--gray-200); padding-bottom: 18px; margin-bottom: 20px; }
.unit-body { max-width: 68ch; }
.unit-body p { font-size: 0.94rem; }
.unit-body ul { font-size: 0.92rem; }
.unit-body li { margin-bottom: 7px; }
.example {
  background: var(--off-white); border: 1px solid var(--gray-200); border-left: 3px solid var(--orange);
  border-radius: var(--radius-sm); padding: 14px 17px; margin: 18px 0;
  font-size: 0.89rem;
}
.example strong {
  display: block; font-size: 0.67rem; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--orange-text); margin-bottom: 4px;
}
.takeaway {
  display: flex; gap: 12px; margin-top: 26px; padding: 16px 18px;
  background: var(--green-soft); border: 1px solid rgba(77,140,60,0.22); border-radius: var(--radius-md);
}
.takeaway-mark {
  font-size: 0.66rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--green-dark); writing-mode: vertical-rl; transform: rotate(180deg);
  flex-shrink: 0; line-height: 1;
}
.takeaway p { font-size: 0.9rem; color: var(--ink-2); font-weight: 500; margin: 0; }
.unit-nav { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--gray-200); }
.unit-nav .spacer { flex: 1; }

/* Diagrams */
.diagram { margin: 22px 0; padding: 18px; background: #FBFBF9; border: 1px solid var(--gray-200); border-radius: var(--radius-md); }
.diagram svg { width: 100%; height: auto; display: block; }
.diagram figcaption { font-size: 0.72rem; color: var(--gray-400); text-align: center; margin-top: 8px; }
.diagram .d-label { font-family: var(--font-sans); font-size: 13px; font-weight: 600; fill: var(--ink); }
.diagram .d-sub { font-family: var(--font-sans); font-size: 10.5px; fill: var(--gray-500); }
.diagram .d-small { font-family: var(--font-sans); font-size: 10px; fill: var(--gray-400); }
.diagram .d-code { font-family: ui-monospace, Menlo, monospace; font-size: 11px; fill: var(--ink); }

/* ---------- Test intro ---------- */
.rules { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.rules li { position: relative; padding-left: 27px; font-size: 0.9rem; margin: 0; }
.rules li::before {
  content: ""; position: absolute; left: 0; top: 0.48em; width: 14px; height: 8px;
  border-left: 2px solid var(--green); border-bottom: 2px solid var(--green);
  transform: rotate(-45deg);
}
.checklist-card { background: var(--off-white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 20px 22px; margin-top: 24px; }
.checklist-card h3 { font-size: 0.95rem; margin-bottom: 10px; }
.checklist-card ul { margin: 0; padding-left: 18px; font-size: 0.85rem; color: var(--gray-500); }
.checklist-card li { margin-bottom: 5px; }

/* ---------- Quiz ---------- */
.quiz-top { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.quiz-count { font-size: 0.76rem; font-weight: 700; color: var(--gray-500); white-space: nowrap; }
.quiz-bar { flex: 1; height: 5px; background: var(--gray-200); border-radius: 99px; overflow: hidden; }
.quiz-bar span { display: block; height: 100%; background: var(--orange); border-radius: 99px; transition: width 260ms ease; }
.q-tag {
  display: inline-block; font-size: 0.66rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--green-dark); background: var(--green-soft);
  border-radius: 99px; padding: 3px 9px; margin-bottom: 14px;
}
html[lang="zh-Hant"] .q-tag, html[lang="zh-Hans"] .q-tag { letter-spacing: 0.04em; }
.scenario {
  font-size: 0.88rem; color: var(--gray-500); font-style: italic;
  border-left: 2px solid var(--gray-300); padding-left: 13px; margin-bottom: 12px;
}
.q-text { font-size: clamp(1.15rem, 2.6vw, 1.4rem); line-height: 1.45; margin-bottom: 20px; }
.options { border: 0; margin: 0; padding: 0; display: grid; gap: 10px; }
.option {
  position: relative; display: block; cursor: pointer;
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  background: #fff; padding: 14px 16px 14px 48px;
  font-size: 0.92rem; line-height: 1.5; color: var(--ink-2);
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.option:hover { border-color: var(--gray-300); }
.option input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.option-marker {
  position: absolute; left: 15px; top: 14px; width: 23px; height: 23px;
  border: 1px solid var(--gray-300); border-radius: 50%; background: #fff;
  font-size: 0.68rem; font-weight: 700; color: var(--gray-500);
  display: inline-flex; align-items: center; justify-content: center;
}
.option.is-selected { border-color: var(--green); background: var(--green-soft); box-shadow: 0 0 0 1px var(--green) inset; }
.option.is-selected .option-marker { background: var(--green); border-color: var(--green); color: #fff; }
.option.is-correct { border-color: var(--green); background: var(--green-soft); }
.option.is-correct .option-marker { background: var(--green); border-color: var(--green); color: #fff; }
.option.is-wrong { border-color: var(--red); background: var(--red-soft); }
.option.is-wrong .option-marker { background: var(--red); border-color: var(--red); color: #fff; }
.option.disabled { cursor: default; }
.option.disabled:hover { border-color: var(--gray-200); }
.option.is-correct.disabled:hover { border-color: var(--green); }
.option.is-wrong.disabled:hover { border-color: var(--red); }
.option input:focus-visible + .option-marker { outline: 3px solid var(--orange); outline-offset: 2px; }
.option:has(input:focus-visible) { border-color: var(--orange); box-shadow: 0 0 0 2px rgba(232,101,42,0.25); }

.feedback { margin-top: 18px; border-radius: var(--radius-md); padding: 16px 18px; border: 1px solid transparent; }
.feedback.ok { background: var(--green-soft); border-color: rgba(77,140,60,0.3); }
.feedback.bad { background: var(--red-soft); border-color: rgba(179,38,30,0.25); }
.feedback-head { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 0.88rem; margin-bottom: 6px; }
.feedback.ok .feedback-head { color: var(--green-dark); }
.feedback.bad .feedback-head { color: var(--red); }
.feedback-icon {
  width: 20px; height: 20px; border-radius: 50%; display: inline-flex;
  align-items: center; justify-content: center; color: #fff; font-size: 0.7rem; flex-shrink: 0;
}
.feedback.ok .feedback-icon { background: var(--green); }
.feedback.bad .feedback-icon { background: var(--red); }
.feedback p { font-size: 0.85rem; color: var(--gray-700); margin: 0; }
.feedback .answer-line { font-size: 0.8rem; margin-top: 8px; padding-top: 8px; border-top: 1px solid rgba(0,0,0,0.07); }
.feedback .answer-line strong { font-weight: 700; }
.form-error-inline { color: var(--red); font-size: 0.8rem; margin-top: 10px; display: none; }
.form-error-inline.show { display: block; }

/* ---------- Result ---------- */
.result-head { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.print-only { display: none; }
.score-ring {
  --pct: 0;
  width: 118px; height: 118px; border-radius: 50%; flex-shrink: 0;
  background: conic-gradient(var(--green) calc(var(--pct) * 1%), var(--gray-200) 0);
  display: grid; place-items: center; position: relative;
}
.score-ring::before { content: ""; position: absolute; inset: 10px; background: #fff; border-radius: 50%; }
.score-ring-inner { position: relative; text-align: center; }
.score-ring strong { display: block; font-size: 1.7rem; line-height: 1; color: var(--ink); }
.score-ring span { font-size: 0.66rem; color: var(--gray-500); }
.score-ring.fail { background: conic-gradient(var(--orange) calc(var(--pct) * 1%), var(--gray-200) 0); }
.status-badge {
  display: inline-block; font-size: 0.68rem; font-weight: 800; letter-spacing: 0.11em;
  text-transform: uppercase; border-radius: 99px; padding: 4px 11px; margin-bottom: 8px;
}
.status-badge.pass { background: var(--green-soft); color: var(--green-dark); }
.status-badge.fail { background: var(--amber-soft); color: var(--amber); }
.result-title { font-size: clamp(1.5rem, 3.4vw, 2rem); margin-bottom: 4px; }
.result-score { font-size: 2rem; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.result-sub { font-size: 0.85rem; color: var(--gray-500); margin-top: 4px; }
.result-note { margin-top: 20px; padding: 14px 16px; border-radius: var(--radius-md); font-size: 0.84rem; }
.result-note.info { background: var(--off-white); border: 1px solid var(--gray-200); }
.result-note.ok { background: var(--green-soft); border: 1px solid rgba(77,140,60,0.25); }
.result-note.warn { background: var(--amber-soft); border: 1px solid rgba(138,90,0,0.2); color: #5c3d00; }
.submission { margin-top: 12px; font-size: 0.8rem; color: var(--gray-500); }
.review { margin-top: 34px; }
.review h2 { font-size: 1.15rem; margin-bottom: 4px; }
.review > p { font-size: 0.83rem; color: var(--gray-500); margin-bottom: 16px; }
.review-item { border: 1px solid var(--gray-200); border-radius: var(--radius-md); background: #fff; margin-bottom: 8px; overflow: hidden; }
.review-item summary {
  cursor: pointer; list-style: none; padding: 13px 16px;
  display: flex; align-items: flex-start; gap: 11px; font-size: 0.86rem; color: var(--ink-2);
}
.review-item summary::-webkit-details-marker { display: none; }
.review-item summary:hover { background: var(--off-white); }
.review-status {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0; margin-top: 1px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.64rem; font-weight: 800; color: #fff;
}
.review-status.ok { background: var(--green); }
.review-status.bad { background: var(--red); }
.review-body { padding: 0 16px 16px 47px; font-size: 0.82rem; color: var(--gray-500); }
.review-body p { margin-bottom: 8px; }
.review-body strong { color: var(--ink); }

/* ---------- Certificate ---------- */
.cert-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; }
.cert-sheet {
  position: relative; background: #fff; color: var(--ink);
  max-width: 920px; margin: 0 auto; padding: 44px 52px 40px;
  border: 1px solid var(--gray-300); border-radius: 2px;
  box-shadow: 0 18px 50px rgba(26,26,24,0.12);
  overflow: hidden;
}
.cert-sheet::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 7px;
  background: linear-gradient(to bottom, var(--orange) 0 50%, var(--green) 50% 100%);
}
.cert-sheet::after {
  content: ""; position: absolute; right: -90px; top: -90px; width: 260px; height: 260px;
  border-radius: 50%; border: 1px solid var(--gray-200);
  box-shadow: 0 0 0 26px #FBFBF9, 0 0 0 27px var(--gray-200);
  pointer-events: none;
}
.cert-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; position: relative; z-index: 1; }
.cert-logo { height: 40px; width: auto; }
.cert-meta { text-align: right; font-size: 0.64rem; color: var(--gray-400); letter-spacing: 0.04em; }
.cert-label {
  margin-top: 34px; font-size: 0.68rem; font-weight: 800; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--orange-text); position: relative; z-index: 1;
}
html[lang="zh-Hant"] .cert-label, html[lang="zh-Hans"] .cert-label { letter-spacing: 0.12em; }
.cert-title { font-size: clamp(1.35rem, 2.8vw, 1.85rem); margin: 7px 0 26px; max-width: 680px; position: relative; z-index: 1; }
.cert-text { font-size: 0.85rem; color: var(--gray-500); margin-bottom: 6px; position: relative; z-index: 1; }
.cert-name {
  font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 600; color: var(--ink);
  letter-spacing: -0.01em; border-bottom: 1px solid var(--gray-300);
  padding-bottom: 10px; margin: 4px 0 22px; position: relative; z-index: 1;
  overflow-wrap: anywhere;
}
html[lang="zh-Hant"] .cert-name, html[lang="zh-Hans"] .cert-name { letter-spacing: 0; }
.cert-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  border-top: 1px solid var(--gray-200); padding-top: 18px; position: relative; z-index: 1;
}
.cert-grid div { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--gray-400); }
.cert-grid strong { display: block; font-size: 0.92rem; text-transform: none; letter-spacing: 0; color: var(--ink); font-weight: 600; margin-top: 3px; overflow-wrap: anywhere; }
.cert-foot {
  display: flex; justify-content: space-between; gap: 30px; align-items: flex-end;
  margin-top: 40px; position: relative; z-index: 1;
}
.cert-sign { flex: 1; max-width: 260px; }
.cert-sign-line { border-top: 1px solid var(--gray-400); padding-top: 6px; font-size: 0.68rem; color: var(--gray-500); }
.cert-sign-line strong { display: block; color: var(--ink); font-size: 0.76rem; margin-bottom: 1px; }
.cert-disclaimer {
  margin-top: 26px; font-size: 0.62rem; line-height: 1.6; color: var(--gray-400);
  border-top: 1px solid var(--gray-200); padding-top: 12px; position: relative; z-index: 1;
}
.cert-note { font-size: 0.62rem; color: var(--gray-400); margin-top: 4px; position: relative; z-index: 1; }

/* ---------- Privacy screen ---------- */
.privacy-page h1 { font-size: clamp(1.5rem, 3.2vw, 2rem); margin-bottom: 10px; }
.privacy-page h2 { font-size: 1rem; margin: 24px 0 6px; }
.privacy-page h3 { font-size: 0.92rem; margin: 18px 0 4px; color: var(--ink); }
.source-list { font-size: 0.8rem; padding-left: 18px; margin-top: 6px; }
.source-list li { margin-bottom: 5px; }
.privacy-page p { font-size: 0.88rem; }
.privacy-page .meta { font-size: 0.78rem; color: var(--gray-400); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,0.55); padding: 34px 0 30px; margin-top: 20px; }
.footer-inner {
  max-width: var(--max); margin-inline: auto; padding-inline: 24px;
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 14px 30px; align-items: start;
}
.footer-name { color: #fff; font-size: 0.82rem; font-weight: 600; margin-bottom: 3px; }
.footer-legal { font-size: 0.7rem; line-height: 1.55; max-width: 440px; margin: 0; color: rgba(255,255,255,0.58); }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; justify-content: flex-end; font-size: 0.74rem; }
.footer-links a, .footer-links .linklike { color: rgba(255,255,255,0.62); text-decoration: none; }
.footer-links a:hover, .footer-links .linklike:hover { color: #fff; text-decoration: underline; }
.footer-meta { grid-column: 1 / -1; font-size: 0.64rem; color: rgba(255,255,255,0.5); border-top: 1px solid rgba(255,255,255,0.1); padding-top: 12px; margin-top: 6px; }

.noscript {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--red); color: #fff; padding: 12px 18px; border-radius: 6px;
  font-size: 0.85rem; z-index: 999; width: calc(100% - 40px); max-width: 520px;
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: 12px; }
.mt-md { margin-top: 22px; }
.mb-0 { margin-bottom: 0; }
.text-muted { color: var(--gray-500); }
.small { font-size: 0.8rem; }
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .train-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .stepper { position: static; }
  .step-list { display: flex; gap: 4px; overflow-x: auto; padding-bottom: 6px; width: 100%; max-width: 100%; -webkit-overflow-scrolling: touch; }
  .step-item { flex: 0 0 auto; }
  .step-btn { border-left: 0; border-bottom: 2px solid var(--gray-200); padding: 8px 10px; white-space: nowrap; }
  .step-btn[aria-current="step"] { border-bottom-color: var(--orange); }
  .step-label-text { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .train-progress { display: none; }
  .unit-card { padding: 26px 22px 24px; max-width: 100%; overflow-wrap: anywhere; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}
@media (max-width: 700px) {
  .hero { padding: 44px 0 40px; }
  .mode-grid { grid-template-columns: 1fr; }
  .learn-grid { grid-template-columns: 1fr; }
  .learn-item:nth-child(odd), .learn-item:nth-child(even) { padding-inline: 0; border-left: 0; }
  .section { padding: 32px 0 44px; }
  .card { padding: 22px 18px; }
  .cert-sheet { padding: 28px 24px 26px; }
  .cert-grid { grid-template-columns: 1fr; gap: 12px; }
  .cert-foot { flex-direction: column; align-items: flex-start; gap: 22px; margin-top: 28px; }
  .cert-sign { width: 100%; max-width: none; }
  .cert-meta { display: none; }
  .result-head { gap: 18px; }
  .score-ring { width: 96px; height: 96px; }
  .score-ring strong { font-size: 1.4rem; }
  .footer-inner { padding-inline: 18px; }
  .header-inner { padding-inline: 16px; gap: 10px; }
  .brand-tag { display: none; }
  .brand-divider { display: none; }
  .brand-logo { height: 30px; }
  .lang-btn { min-width: 34px; padding-inline: 5px; }
}
@media (max-width: 420px) {
  .btn-row .btn { width: 100%; }
  .unit-nav .btn { flex: 1 1 100%; }
  .unit-nav .spacer { display: none; }
}

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



/* ============================================================
   ctm-Seitenrahmen: Header, Navigation, Footer
   ============================================================ */
.header-inner { max-width: 1140px; }
.brand-logo { height: 44px; }
.main-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.main-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  letter-spacing: 0.01em;
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition);
}
.main-nav a:hover { color: var(--green-dark); border-bottom-color: var(--green-dark); }
.main-nav a.active { color: var(--green-dark); border-bottom-color: var(--green-dark); }
.lang-nav { margin-left: 0; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  margin-left: 0.25rem;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-footer {
  padding: 44px 0 24px;
  margin-top: 20px;
}
.footer-main {
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: 24px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: 28px 56px;
  align-items: start;
}
.footer-logo { height: 34px; width: auto; }
.footer-tagline {
  margin-top: 10px;
  margin-bottom: 10px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.72);
  max-width: 220px;
}
.footer-legal { max-width: 260px; }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-col h4 {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: 10px;
}
html[lang="zh-Hant"] .footer-col h4, html[lang="zh-Hans"] .footer-col h4 { letter-spacing: 0.04em; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 6px; }
.footer-col a, .footer-col .linklike {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.62);
  text-decoration: none;
}
.footer-col a:hover, .footer-col .linklike:hover { color: #fff; text-decoration: underline; }
.footer-address {
  font-style: normal;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.62);
}
.footer-mail {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.62);
}
.footer-mail:hover { color: #fff; }
.footer-bottom {
  max-width: 1140px;
  margin: 30px auto 0;
  padding: 16px 24px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.5);
}
.footer-bottom p { margin: 0; }
.footer-meta {
  max-width: 1140px;
  margin: 8px auto 0;
  padding: 0 24px;
  font-size: 0.64rem;
  color: rgba(255,255,255,0.42);
  border-top: 0;
}

@media (max-width: 980px) {
  .main-nav { gap: 1rem; }
  .main-nav a { font-size: 0.82rem; }
  .lang-btn { min-width: 34px; padding-inline: 5px; }
}
@media (max-width: 860px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 18px 24px;
    gap: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    z-index: 20;
  }
  .main-nav.open a { font-size: 0.95rem; border-bottom: 0; }
  .nav-toggle { display: flex; }
  .lang-nav { margin-left: auto; }
  .footer-main { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 700px) {
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-main, .footer-bottom, .footer-meta { padding-inline: 18px; }
  .footer-bottom { flex-direction: column; gap: 4px; }
  .header-inner { padding-inline: 16px; gap: 10px; }
  .brand-logo { height: 34px; }
}
@media (max-width: 480px) {
  .footer-cols { grid-template-columns: 1fr; }
}

/* ---------- Print ---------- */
@media print {
  @page { size: A4 landscape; margin: 8mm; }
  body { background: #fff; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .cert-sheet, .result-print { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .site-header, .site-footer, .skip-link, .no-print, .cert-toolbar, .review, .btn-row { display: none !important; }
  .screen { padding: 0; min-height: 0; }
  .cert-sheet {
    max-width: none; width: 100%; margin: 0; padding: 10mm 14mm 8mm;
    border: 1px solid #bbb; box-shadow: none; border-radius: 0;
    page-break-inside: avoid; break-inside: avoid;
    min-height: 170mm; display: flex; flex-direction: column;
  }
  .cert-sheet::after { display: none; }
  .cert-sheet::before { width: 4mm; }
  .cert-label { margin-top: 18px; font-size: 0.6rem; }
  .cert-title { font-size: 1.5rem; margin: 5px 0 14px; }
  .cert-text { font-size: 0.78rem; }
  .cert-name { font-size: 1.9rem; margin: 2px 0 14px; padding-bottom: 6px; }
  .cert-grid { padding-top: 12px; gap: 12px; }
  .cert-grid strong { font-size: 0.84rem; }
  .cert-foot { margin-top: auto; padding-top: 22px; }
  .cert-disclaimer { margin-top: 14px; padding-top: 8px; font-size: 0.56rem; }
  .cert-note { font-size: 0.56rem; }
  .card { border: 0; box-shadow: none; padding: 0; }
  body.print-result .site-header, body.print-result .site-footer,
  body.print-result .no-print { display: none !important; }
  body.print-result .result-card > *:not(.result-print) { display: none !important; }
  body.print-result .result-print { display: block !important; }
  body.print-result .screen { padding: 0; }
  .print-only { display: block !important; }
  .result-doc-head {
    display: flex !important; align-items: center; gap: 22px;
    border-bottom: 1px solid var(--gray-300); padding-bottom: 12px; margin-bottom: 22px;
  }
  .result-doc-logo { height: 36px; width: auto; }
  .result-doc-meta { font-size: 10.5px; line-height: 1.55; color: var(--gray-500); }
  .result-doc-meta strong {
    display: block; font-size: 9.5px; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--orange-text); margin-bottom: 2px;
  }
  .result-doc-foot {
    margin-top: 26px; border-top: 1px solid var(--gray-200); padding-top: 9px;
    font-size: 9.5px; line-height: 1.5; color: var(--gray-500);
  }
}

/* ---------- Diagram variants ---------- */
.chain-row {
  display: flex; flex-wrap: wrap; gap: 7px; align-items: center; justify-content: center;
}
.chain-node {
  background: #fff; border: 1px solid var(--gray-200); border-radius: 99px;
  padding: 6px 12px; font-size: 0.76rem; color: var(--ink-2); white-space: nowrap;
}
.chain-arrow { color: var(--orange); font-weight: 700; font-size: 0.9rem; }

.mask-row { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 10px; align-items: start; }
.mask-label {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--gray-400); padding-top: 12px;
}
html[lang="zh-Hant"] .mask-label, html[lang="zh-Hans"] .mask-label { letter-spacing: 0.02em; }
.mask-text {
  margin: 0; background: #fff; border: 1px solid var(--gray-200); border-radius: 6px;
  padding: 10px 12px; font-size: 0.86rem; color: var(--ink-2);
}
.mask-after { border-color: rgba(77,140,60,0.35); background: var(--green-soft); }
.mask-arrow { text-align: center; color: var(--gray-400); padding: 5px 0; font-size: 0.9rem; }

.transfer-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.transfer-step {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  padding: 12px 9px; font-size: 0.73rem; line-height: 1.4; color: var(--ink-2);
  display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center;
  justify-content: flex-start;
}
.transfer-num {
  width: 20px; height: 20px; border-radius: 50%; background: var(--orange); color: #fff;
  font-size: 0.64rem; font-weight: 700; display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
@media (max-width: 620px) {
  .transfer-row { grid-template-columns: 1fr 1fr; }
  .mask-row { grid-template-columns: 1fr; gap: 4px; }
  .mask-label { padding-top: 0; }
}