:root {
  --color-bg: #F6F5F1;
  --color-panel: #FFFFFF;
  --color-panel-soft: #ECEDEA;
  --color-border: #D9DBD7;
  --color-accent: #0B6655;
  --color-accent-dark: #083F38;
  --color-accent-deep: #062F2B;
  --color-accent-black: #052722;
  --color-accent-soft: #DDE9E5;
  --color-text: #172322;
  --color-muted: #68716E;
  --color-muted-light: #8E9793;
  --color-success: #2D7867;
  --color-warn: #8A7448;
  --color-error: #985B55;
  --color-cold-line: #E8F5F0;
  --color-cold-line-soft: #A8CEC4;
  --color-window-top: #F8FAF9;
  --color-window-side: #EFF2F0;
  --color-window-rule: #F4F6F5;
  --color-window-selected: #DCEAE6;
  --color-window-text: #263432;
  --color-window-muted: #77817D;
  --color-white-soft: #F7FCFA;
  --color-board-line: rgba(232, 245, 240, 0.12);
  --color-board-line-strong: rgba(232, 245, 240, 0.24);
  --color-board-depth: rgba(3, 28, 25, 0.28);
  --color-shadow: rgba(7, 31, 28, 0.18);
  --color-shadow-light: rgba(7, 31, 28, 0.09);
  --color-white-shadow: rgba(255, 255, 255, 0.3);
  --color-overlay: rgba(5, 39, 34, 0.38);
  --color-focus: rgba(11, 102, 85, 0.28);
  --font-display: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-body: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --radius-xs: 3px;
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --shadow-window: 0 26px 58px var(--color-shadow), 0 5px 16px var(--color-shadow-light);
  --shadow-card: 0 12px 30px var(--color-shadow-light);
  --shadow-button: 0 8px 18px var(--color-shadow-light);
  --page-width: 1344px;
  --content-width: 920px;
  --header-height: 78px;
  --gutter: 32px;
  --section-space: 104px;
  --weight-regular: 400;
  --weight-medium: 520;
  --weight-semibold: 620;
  --transition-fast: 180ms ease;
  --transition-slow: 620ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 0;
  min-height: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  background: var(--color-bg);
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 0;
  min-height: 100%;
  margin: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
header,
footer,
nav,
div {
  min-width: 0;
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

svg,
.icon,
.brand-mark,
.platform-icon {
  flex-shrink: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-dark);
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
select {
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
blockquote,
figure,
pre,
table {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  letter-spacing: -0.035em;
  text-wrap: balance;
}

h1 {
  margin-bottom: 24px;
  /* 2026-08-13 用户打回「字太大」:上限 70px→60px(海报式三行标题,每行再叠 70px 就是一面墙) */
  font-size: clamp(2.75rem, 4.2vw, 3.75rem);
  line-height: 1.1;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 3.4vw, 3.25rem);
  line-height: 1.12;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  line-height: 1.25;
}

h4 {
  margin-bottom: 10px;
  font-size: 1.05rem;
  line-height: 1.35;
  font-weight: var(--weight-medium);
}

p {
  margin-bottom: 1.25em;
}

strong {
  font-weight: var(--weight-semibold);
}

small {
  color: var(--color-muted);
}

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

:not(pre) > code {
  max-width: 100%;
  padding: 0.12em 0.34em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-soft);
  overflow-wrap: anywhere;
  word-break: break-word;
}

pre {
  max-width: 100%;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-accent-black);
  color: var(--color-cold-line);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  -webkit-overflow-scrolling: touch;
}

pre code {
  white-space: pre;
  overflow-wrap: normal;
}

hr {
  height: 1px;
  margin: 48px 0;
  border: 0;
  background: var(--color-border);
}

.wrap {
  width: 100%;
  max-width: calc(var(--page-width) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap-narrow {
  width: 100%;
  max-width: calc(var(--content-width) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  overflow-x: clip;
}

.section-compact {
  padding-top: 64px;
  padding-bottom: 64px;
  overflow-x: clip;
}

.section-panel {
  background: var(--color-panel);
  border-block: 1px solid var(--color-border);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 46px;
}

.section-kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 20px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-kicker::before,
.eyebrow-mark {
  width: 27px;
  height: 1px;
  flex-shrink: 0;
  background: var(--color-accent);
  content: "";
}

.lead {
  max-width: 760px;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.75;
}

.muted {
  color: var(--color-muted);
}

.mono {
  font-family: var(--font-mono);
}

.accent-text {
  color: var(--color-accent);
}

.panel,
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.panel {
  padding: clamp(22px, 3vw, 38px);
}

.card {
  padding: 24px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  border-color: var(--color-cold-line-soft);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.tilt,
.tilt-card {
  transform: rotate(-0.35deg);
}

.button {
  min-height: 48px;
  max-width: 100%;
  padding: 0 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--color-panel);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.2;
  font-weight: var(--weight-medium);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.button:hover {
  color: var(--color-text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-button);
}

.button svg {
  width: 16px;
  height: 16px;
}

.button-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-white-soft);
  box-shadow: var(--shadow-button);
}

.button-primary:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  color: var(--color-white-soft);
}

.button-secondary {
  background: var(--color-panel);
}

.button-quiet {
  border-color: transparent;
  background: transparent;
  color: var(--color-accent-dark);
}

.button[disabled],
.button.is-disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
  box-shadow: none;
}

.button-row,
.cta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.badge,
.chip,
.tag {
  min-height: 27px;
  max-width: 100%;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1;
  white-space: nowrap;
}

.badge::before,
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  background: var(--color-accent);
  content: "";
}

.badge-success::before {
  background: var(--color-success);
}

.badge-warn::before {
  background: var(--color-warn);
}

.badge-error::before {
  background: var(--color-error);
}

.site-header {
  position: relative;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.header-inner {
  width: 100%;
  max-width: calc(var(--page-width) + (var(--gutter) * 2));
  height: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 11px;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-text);
}

.brand-mark {
  width: 35px;
  height: 35px;
}

.brand-copy {
  display: flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
}

.brand-name {
  font-size: 17px;
  line-height: 1;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
}

.brand-site {
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1;
}

.primary-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  min-height: 38px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link svg {
  width: 15px;
  height: 15px;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  background: var(--color-panel-soft);
  color: var(--color-accent-dark);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.language-menu {
  position: relative;
}

.language-switch {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-text);
  font-size: 13px;
}

.language-list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 60;
  width: 156px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: none;
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.language-menu.is-open .language-list {
  display: grid;
}

.language-list a {
  min-height: 38px;
  padding: 0 10px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  color: var(--color-muted);
  font-size: 13px;
}

.language-list a:hover,
.language-list a[aria-current="true"] {
  background: var(--color-panel-soft);
  color: var(--color-accent-dark);
}

.menu-toggle {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: none;
  place-items: center;
  background: var(--color-panel);
}

.menu-toggle svg {
  width: 21px;
  height: 21px;
}

.mobile-nav {
  display: none;
}

.nav-veil {
  display: none;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
}

.footer-main {
  padding-top: 68px;
  padding-bottom: 54px;
  display: grid;
  grid-template-columns: minmax(240px, 1.2fr) repeat(3, minmax(150px, 1fr));
  gap: 50px;
}

.footer-brand p {
  max-width: 390px;
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 14px;
}

.footer-heading {
  margin-bottom: 16px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--weight-medium);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.footer-links {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  list-style: none;
}

.footer-links a {
  color: var(--color-muted);
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--color-accent-dark);
}

.footer-bottom {
  min-height: 68px;
  padding-block: 18px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--color-muted);
  font-size: 12px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  background: var(--color-panel);
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 15px 17px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--color-panel-soft);
  color: var(--color-text);
  font-weight: var(--weight-medium);
}

.data-table td {
  color: var(--color-muted);
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.prose {
  max-width: 100%;
  color: var(--color-text);
}

.prose h2 {
  margin-top: 2.2em;
}

.prose h3 {
  margin-top: 1.8em;
}

.prose p,
.prose li {
  color: var(--color-muted);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-cold-line-soft);
  text-underline-offset: 3px;
}

.prose li + li {
  margin-top: 0.5em;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1120px) {
  :root {
    --gutter: 24px;
  }

  .brand-site {
    display: none;
  }

  .nav-link {
    padding-inline: 8px;
  }

  .nav-link svg {
    display: none;
  }
}

@media (max-width: 900px) {
  .primary-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .header-tools .language-menu {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .nav-veil {
    position: fixed;
    inset: var(--header-height) 0 0;
    z-index: 40;
    background: var(--color-overlay);
  }

  .site-header.menu-open .nav-veil {
    display: block;
  }

  .mobile-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    z-index: 51;
    width: min(390px, 100%);
    max-height: calc(100dvh - var(--header-height));
    padding: 14px var(--gutter) 22px;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-left: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-panel);
  }

  .site-header.menu-open .mobile-nav {
    display: block;
  }

  .mobile-nav-list,
  .mobile-language-list {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .mobile-nav-list a,
  .mobile-language-list a {
    width: 100%;
    min-height: 48px;
    padding: 10px 4px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
  }

  .mobile-nav-list svg {
    width: 17px;
    height: 17px;
    color: var(--color-accent);
  }

  .mobile-language-title {
    margin: 22px 0 5px;
    color: var(--color-muted-light);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .mobile-language-list a {
    color: var(--color-muted);
  }

  .footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 66px;
    --gutter: 18px;
    --section-space: 72px;
  }

  body {
    font-size: 15px;
  }

  h1 {
    /* 2026-08-13 用户打回:390px 屏上 13.2vw≈51px×4 行=半屏都是标题;封顶 40px */
    font-size: clamp(1.75rem, 9vw, 2.5rem);
    letter-spacing: -0.02em;
  }

  h2 {
    font-size: clamp(1.4rem, 6.5vw, 1.85rem);
  }

  .wrap,
  .wrap-narrow {
    width: 100%;
    padding-inline: var(--gutter);
  }

  .header-inner {
    padding-inline: var(--gutter);
    gap: 12px;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
  }

  .brand-name {
    font-size: 15px;
  }

  .button-row,
  .cta-row {
    align-items: stretch;
  }

  .button-row .button,
  .cta-row .button {
    flex: 1 1 145px;
  }

  .panel,
  .card {
    padding: 20px;
  }

  .tilt,
  .tilt-card,
  [class*="tilt"] {
    transform: none;
  }

  .footer-main {
    padding-top: 52px;
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .data-table {
    min-width: 590px;
  }
}

@media (max-width: 380px) {
  :root {
    --gutter: 16px;
  }

  .brand-name {
    font-size: 14px;
  }

  .button {
    padding-inline: 15px;
  }
}