/* ========================================================================
   Detools GmbH · v0.8
   German Industrial · Refined Minimalism (denser, structured)
   Brand: #4778CD blue + #70AD46 green (from logo)
   ======================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@200;300;400;500;600;700;800&family=Newsreader:ital,wght@0,300;0,400;0,500;1,300;1,400&display=swap');

:root {
  --ink:       #0a1428;
  --ink-soft:  #2a3445;
  --paper:     #fafaf7;
  --paper-2:   #f3f2ec;
  --slate:     #5d6b7a;
  --slate-2:   #8a95a2;
  --hairline:  #dedcd5;
  --hairline-2:#ebe9e2;
  --brand:     #4778CD;
  --brand-dk:  #3461b5;
  --signal:    #70AD46;

  --font-display: 'Manrope', system-ui, sans-serif;
  --font-text:    'Newsreader', Georgia, serif;
  --font-mono:    ui-monospace, 'SF Mono', 'Cascadia Mono', monospace;

  --tracking-tight: -0.025em;
  --tracking-wide:  0.18em;
  --tracking-mono:  0.04em;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--ink); color: var(--paper); }

.shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3.5rem);
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 0 1.2rem;
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(8px);
  z-index: 50;
}
.topbar .brand { display: flex; align-items: center; gap: 1rem; }
.topbar .brand-logo { height: 26px; width: auto; display: block; }
.topbar .brand-meta {
  font-family: var(--font-display);
  color: var(--slate);
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding-left: 1rem;
  border-left: 1px solid var(--hairline);
}
.topbar .brand-slogan {
  font-family: var(--font-text, Georgia, serif);
  font-style: italic;
  color: var(--signal, #70AD46);
  font-weight: 400;
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
  padding-left: 1rem;
  border-left: 1px solid var(--hairline);
}
.topbar .brand-since {
  font-family: var(--font-display);
  color: var(--slate-2, #8a95a2);
  font-weight: 500;
  font-size: 0.625rem;
  letter-spacing: var(--tracking-wide);
  margin-left: 0.75rem;
}
.topbar .brand-since::before {
  content: "·";
  margin-right: 0.75rem;
  color: var(--hairline);
}
.topbar .lang-switch {
  display: flex; gap: 1.4rem; align-items: center;
  font-family: var(--font-display);
  font-size: 0.75rem; letter-spacing: var(--tracking-wide);
  text-transform: uppercase; font-weight: 500;
}
.topbar .lang-switch a {
  color: var(--slate-2); text-decoration: none; font-weight: 500;
  transition: color 200ms ease; position: relative; padding-bottom: 3px;
}
.topbar .lang-switch a:hover { color: var(--ink); }
.topbar .lang-switch a.is-active { color: var(--ink); }
.topbar .lang-switch a.is-active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px;
  height: 2px; background: var(--brand);
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(3.5rem, 8vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
}
/* Hero两栏:左(标题+facts) 右(描述),解决左重右空 */
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}
.hero-left { display: flex; flex-direction: column; }
.hero-right { display: flex; flex-direction: column; justify-content: center; padding-bottom: 0; }
.hero-grid .lede { margin-top: 0; max-width: 42ch; }
.hero-grid .facts { margin-top: clamp(2.5rem, 5vw, 4rem); }
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 1.8rem; align-items: stretch; }
  .hero-right { justify-content: flex-start; padding-bottom: 0; }
  .hero-grid .facts { margin-top: 2.2rem; }
}
.hero .reg-mark {
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: var(--tracking-mono);
  color: var(--slate-2); text-transform: uppercase; margin-bottom: 1.8rem;
}
.hero .eyebrow {
  font-family: var(--font-display);
  font-weight: 600; font-size: 0.8125rem;
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  color: var(--slate); margin-bottom: 1.5rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.0;
  letter-spacing: var(--tracking-tight);
  max-width: 16ch;
}
.hero h1 em { font-style: italic; font-weight: 300; color: var(--brand); }
/* 英德标题较长,字号略小+足够宽度,确保第一行短语完整、稳定2行 */
.hero h1.h1-en {
  font-size: clamp(2rem, 4vw, 3.1rem);
  max-width: 100%;
  line-height: 1.08;
  white-space: nowrap;
}
.hero h1.h1-en em { white-space: nowrap; }
/* 移动端:取消nowrap+字号小,窄屏自然换行不溢出(放桌面规则后确保覆盖) */
@media (max-width: 880px) {
  .hero h1.h1-en { white-space: normal; font-size: clamp(1.5rem, 6vw, 2.2rem); line-height: 1.15; }
  .hero h1.h1-en em { white-space: normal; }
}
.hero .lede {
  font-family: var(--font-text);
  font-weight: 400;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-top: 2rem;
}

/* ---------- Fact badges (hard facts, visualized) ---------- */
.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 3rem;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--hairline);
}
.facts .fact {
  flex: 1 1 auto;
  min-width: 150px;
  padding: 1.4rem 1.6rem 1.4rem 0;
  margin-right: 2.5rem;
  border-right: none;
}
.facts .fact:not(:last-child) {
  border-right: 1px solid var(--hairline-2);
  padding-right: 2.5rem;
  margin-right: 2.5rem;
}
.facts .fact .num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.75rem;
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  line-height: 1;
  display: block;
  margin-bottom: 0.5rem;
}
.facts .fact .num .accent { color: var(--brand); }
.facts .fact .cap {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--slate);
}

/* 两格版:克制设计——靠左紧凑成"双信任锚",不撑满,右侧留白是设计呼吸 */
.facts.facts-2 {
  display: inline-flex;
  width: auto;
  max-width: 100%;
}
.facts.facts-2 .fact {
  flex: 0 1 auto;
  min-width: 0;
}
.facts.facts-2 .fact:first-child {
  padding-right: 3rem;
  margin-right: 3rem;
  border-right: 1px solid var(--hairline-2);
}
.facts.facts-2 .fact:last-child {
  margin-right: 0;
  padding-right: 0;
}

/* ---------- Section blocks with sticky nav ---------- */
.sections { margin-top: clamp(1.5rem, 3vw, 2.5rem); }

section.block {
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  border-top: 1px solid var(--hairline);
}
@media (min-width: 860px) {
  section.block {
    grid-template-columns: 200px 1fr;
    gap: 3rem;
  }
}
section.block .label {
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: var(--tracking-mono);
  color: var(--slate); text-transform: uppercase;
  padding-top: 0.5rem;
  align-self: start;
}
@media (min-width: 860px) {
  section.block .label { position: sticky; top: 6rem; }
}
section.block .label-num { color: var(--brand); margin-right: 0.6rem; font-weight: 600; }
section.block .label .sub {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-text);
  font-style: italic;
  font-size: 0.9rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--slate-2);
  max-width: 18ch;
  line-height: 1.4;
}

section.block .body { max-width: 64ch; }
section.block h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.12; letter-spacing: var(--tracking-tight);
  margin-bottom: 1.5rem; color: var(--ink);
}
section.block .body > p {
  font-family: var(--font-text);
  font-weight: 400;
  font-size: 1.0625rem; line-height: 1.62;
  color: var(--ink); margin-bottom: 1.1rem;
}
section.block .body > p.lead-line {
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--ink);
  margin-bottom: 1.4rem;
}
section.block .body > p:last-child { margin-bottom: 0; }

/* ---------- Capability rows (structured, not bullets) ---------- */
.caps {
  margin-top: 1.8rem;
  border-top: 1px solid var(--hairline-2);
}
.caps .cap-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--hairline-2);
}
.caps .cap-row .idx {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--brand);
  letter-spacing: var(--tracking-mono);
}
.caps .cap-row .txt {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1rem;
  color: var(--ink);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid; grid-template-columns: 1fr; gap: 2.5rem;
}
@media (min-width: 600px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-grid .contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}
.contact-grid .col h3 {
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: var(--tracking-mono);
  color: var(--slate); text-transform: uppercase;
  margin-bottom: 0.9rem; font-weight: 500;
}
.contact-grid .col p, .contact-grid .col a {
  font-family: var(--font-display);
  font-size: 1.0625rem; font-weight: 400; line-height: 1.5;
  color: var(--ink); text-decoration: none;
}
.contact-grid .col a {
  border-bottom: 1px solid var(--brand);
  transition: color 200ms ease;
}
.contact-grid .col a:hover { color: var(--brand); }
.address-lines { font-style: normal; line-height: 1.6; }

/* ---------- Footer ---------- */
.foot {
  border-top: 1px solid var(--ink);
  padding: 2rem 0 2.5rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  display: flex; flex-wrap: wrap;
  justify-content: space-between; align-items: baseline; gap: 1rem;
}
.foot .copy {
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: var(--tracking-mono);
  text-transform: uppercase; color: var(--slate);
}
.foot .signal-dot {
  display: inline-block; width: 6px; height: 6px;
  background: var(--signal); border-radius: 50%;
  margin-right: 0.6rem; vertical-align: middle;
}
.foot .legal-links { display: flex; gap: 1.8rem; }
.foot .legal-links a {
  color: var(--slate); text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem; letter-spacing: var(--tracking-mono);
  text-transform: uppercase; transition: color 200ms ease;
}
.foot .legal-links a:hover { color: var(--brand); }

/* ---------- Legal pages ---------- */
.legal-page { padding: clamp(2.5rem, 5vw, 4rem) 0; max-width: 760px; }
.legal-page h1 {
  font-family: var(--font-display); font-weight: 200;
  font-size: clamp(2rem, 5vw, 3rem); letter-spacing: var(--tracking-tight);
  margin-bottom: 1.5rem;
}
.legal-page h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: 1.125rem; margin-top: 2rem; margin-bottom: 0.75rem; color: var(--ink);
}
.legal-page h3 {
  font-family: var(--font-display); font-weight: 500;
  font-size: 1rem; margin-top: 1.2rem; margin-bottom: 0.5rem; color: var(--ink);
}
.legal-page p, .legal-page address, .legal-page li {
  font-family: var(--font-text); font-style: normal; font-weight: 400;
  font-size: 1rem; line-height: 1.65; color: var(--ink);
  max-width: 72ch; margin-bottom: 1rem;
}
.legal-page ul, .legal-page ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.legal-page a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.legal-page strong { font-weight: 500; }
.legal-page .meta {
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: var(--tracking-mono); color: var(--slate);
  text-transform: uppercase; margin-bottom: 1.5rem;
}
.legal-page .back-link {
  display: inline-block; margin-bottom: 2rem;
  font-family: var(--font-mono); font-size: 0.6875rem;
  letter-spacing: var(--tracking-mono); text-transform: uppercase;
  color: var(--slate); text-decoration: none;
}
.legal-page .back-link:hover { color: var(--brand); }

/* ---------- Reveal ---------- */
@keyframes reveal-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.hero .reg-mark { animation: reveal-up 600ms ease-out both; }
.hero .eyebrow  { animation: reveal-up 600ms ease-out 80ms both; }
.hero h1        { animation: reveal-up 700ms ease-out 160ms both; }
.hero .lede     { animation: reveal-up 700ms ease-out 280ms both; }
.hero .facts    { animation: reveal-up 700ms ease-out 400ms both; }
@media (prefers-reduced-motion: reduce) {
  .hero .reg-mark, .hero .eyebrow, .hero h1, .hero .lede, .hero .facts { animation: none; }
}

@media print {
  .topbar, .foot { border-color: #999; }
  body { background: white; color: black; }
}

/* ---------- Pending content placeholder (步骤2待填充,仅开发预览可见) ---------- */
.pending {
  border: 1px dashed var(--brand);
  border-radius: 4px;
  padding: 1.2rem 1.4rem;
  background: rgba(71, 120, 205, 0.04);
  margin-top: 0.5rem;
}
.pending .pending-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--brand);
  display: block;
  margin-bottom: 0.5rem;
}
.pending .pending-note {
  font-family: var(--font-text);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--slate);
  line-height: 1.5;
}

/* ---------- Founder block ---------- */
.founder {
  margin-top: 2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--hairline-2);
}
.founder-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 0.9rem;
  font-weight: 500;
}
.founder p {
  font-family: var(--font-text);
  font-weight: 400;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- Sub-head (section 内小标题) ---------- */
.sub-head {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--slate);
  margin-top: 2.2rem;
  margin-bottom: 0.9rem;
}

/* ---------- Phases (P0-P5 横向流程图) ---------- */
.phases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 0.5rem;
  margin-top: 2rem;
}
@media (min-width: 640px) {
  .phases { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1000px) {
  .phases { grid-template-columns: repeat(6, 1fr); gap: 0; }
}
.phase {
  position: relative;
  padding: 0 0.9rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
/* 横向箭头连接线(仅桌面6列时) */
@media (min-width: 1000px) {
  .phase:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 0.6rem;
    right: 0.2rem;
    width: 0.6rem;
    height: 1px;
    background: var(--brand);
  }
  .phase:not(:last-child)::before {
    content: '';
    position: absolute;
    top: calc(0.6rem - 2.5px);
    right: 0.2rem;
    width: 0;
    height: 0;
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent;
    border-left: 4px solid var(--brand);
    z-index: 2;
  }
}
.phase-id {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--brand);
  letter-spacing: var(--tracking-mono);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1.5px solid var(--brand);
  border-radius: 50%;
  background: var(--paper);
}
.phase-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  margin-top: 0.2rem;
}
.phase-desc {
  font-family: var(--font-text);
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--slate);
}

/* ---------- Models (合作模式卡) ---------- */
.models {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.8rem;
}
@media (min-width: 760px) {
  .models { grid-template-columns: repeat(3, 1fr); }
}
.model {
  border-top: 2px solid var(--brand);
  padding-top: 1.1rem;
}
.model-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brand);
  letter-spacing: var(--tracking-mono);
  font-weight: 500;
}
.model h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0.5rem 0 0.7rem;
}
.model-fit {
  font-family: var(--font-display) !important;
  font-weight: 500 !important;
  font-size: 0.875rem !important;
  color: var(--slate) !important;
  margin-bottom: 0.6rem !important;
}
.model-desc {
  font-family: var(--font-text) !important;
  font-size: 0.95rem !important;
  line-height: 1.55 !important;
  color: var(--ink) !important;
}

/* ---------- Mobile nav fix (窄屏防重叠) ---------- */
@media (max-width: 560px) {
  .topbar .brand-slogan, .topbar .brand-since { display: none; }  /* 窄屏隐藏slogan和年份,logo已表品牌,防与语言切换重叠 */
  .topbar .lang-switch { gap: 1rem; }
  .topbar { padding: 1.1rem 0 1rem; }
}

/* ---------- Contact 防换行(邮箱/电话/传真/街道名不中断) ---------- */
.contact-grid .col p,
.contact-grid .col a,
.contact-grid .address-lines {
  white-space: nowrap;
}
@media (max-width: 420px) {
  /* 极窄屏允许邮箱换行避免溢出 */
  .contact-grid .col a { white-space: normal; word-break: break-word; }
}

/* ---------- Hero 抽象几何背景(极淡,呼应精密工程感) ---------- */
.hero {
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -1.5rem;
  right: -2rem;
  width: min(42%, 380px);
  height: 100%;
  background-image:
    linear-gradient(var(--hairline-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline-2) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: linear-gradient(135deg, transparent 30%, black 100%);
  mask-image: linear-gradient(135deg, transparent 30%, black 100%);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
@media (max-width: 640px) {
  .hero::before { display: none; }  /* 窄屏不显,避免干扰 */
}