/* Tokenim 官网 · 编辑风 · 暖色系 */

:root {
  --color-ink: #1a1a1a;
  --color-ink-muted: #4a4a4a;
  --color-cream: #f5f0e8;
  --color-cream-dark: #e8e2d8;
  --color-amber: #c9942e;
  --color-amber-light: #e8a855;
  --color-sage: #8b9a7a;
  --color-bg: #ffffff;
  --color-bg-dark: #1a1a1a;
  --font-serif: "Noto Serif SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius: 8px;
  --radius-lg: 12px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
}

.page-wrapper {
  min-height: 100vh;
}

/* 顶栏 */
.top-bar {
  background: var(--color-ink);
  color: var(--color-cream);
  padding: var(--space-xs) var(--space-md);
  text-align: center;
}

.top-bar__inner {
  max-width: 1560px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.top-bar__tagline {
  font-size: 0.875rem;
  font-weight: 400;
}

.top-bar__download {
  color: var(--color-amber-light);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s var(--ease);
}

.top-bar__download:hover {
  opacity: 0.85;
}

/* 主导航 */
.masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-cream-dark);
}

.masthead__container {
  max-width: 1560px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.masthead__brand {
  text-decoration: none;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.masthead__brand-img {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
}

.masthead__brand-text {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.2;
}

.masthead__brand-mark {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
}

.masthead__brand-sub {
  display: block;
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  letter-spacing: 0.1em;
}

@media (max-width: 768px) {
  .masthead__brand-img {
    width: 28px;
    height: 28px;
  }
}

.masthead__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.masthead__link {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s var(--ease);
}

.masthead__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-amber);
  transition: width 0.3s var(--ease);
}

.masthead__link:hover,
.masthead__link.is-active {
  color: var(--color-ink);
}

.masthead__link:hover::after,
.masthead__link.is-active::after {
  width: 100%;
}

.masthead__cta {
  background: var(--color-amber);
  color: #fff;
  padding: var(--space-xs) var(--space-md);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.masthead__cta:hover {
  background: var(--color-amber-light);
  transform: translateY(-1px);
}

.masthead__menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border: none;
  background: none;
  cursor: pointer;
}

.masthead__menu-line {
  width: 24px;
  height: 2px;
  background: var(--color-ink);
}

.masthead__dropdown {
  display: none;
  background: var(--color-cream);
  padding: var(--space-md);
  flex-direction: column;
  gap: var(--space-sm);
}

.masthead__dropdown a {
  color: var(--color-ink);
  text-decoration: none;
  padding: var(--space-xs) 0;
}

@media (max-width: 768px) {
  .masthead__nav {
    display: none;
  }

  .masthead__menu-btn {
    display: flex;
  }

  .masthead.masthead--open .masthead__dropdown {
    display: flex;
  }
}

/* 首屏 */
.splash {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: var(--space-2xl) var(--space-md);
}

.splash__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
}

.splash__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.splash__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 26, 0.75) 0%,
    rgba(26, 26, 26, 0.5) 50%,
    rgba(26, 26, 26, 0.3) 100%
  );
}

.splash__content {
  max-width: 720px;
  color: #fff;
}

.splash__eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.9;
  margin-bottom: var(--space-sm);
}

.splash__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-md);
}

.splash__lead {
  font-size: 1.1rem;
  opacity: 0.95;
  margin: 0 0 var(--space-xl);
  line-height: 1.7;
}

.splash__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--color-amber-light);
  color: var(--color-ink);
}

.btn--outline {
  border: 2px solid rgba(255, 255, 255, 0.8);
  color: #fff;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* 区块通用 */
.block {
  padding: var(--space-xl) var(--space-lg);
}

.block__container {
  max-width: 1560px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.block__container--narrow {
  max-width: 1560px;
  padding: 0 var(--space-lg);
}

.block__header {
  margin-bottom: var(--space-xl);
}

.block__header--center {
  text-align: center;
}

.block__header--split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.block__header--with-visual {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 40%);
  gap: var(--space-xl);
  align-items: center;
}

.block__header--with-visual .block__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.block__header--with-visual-inline .block__visual--compact {
  margin-top: var(--space-lg);
}

.block__header--with-visual-inline .block__visual--compact img {
  width: 100%;
  max-width: 800px;
  height: auto;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius);
}

@media (max-width: 768px) {
  .block__header--with-visual {
    grid-template-columns: 1fr;
  }

  .block__header--with-visual .block__visual {
    order: -1;
  }
}

.block__header--light .block__title,
.block__header--light .block__text,
.block__header--light .block__label {
  color: #fff;
}

.block__label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: var(--space-xs);
}

.block__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 var(--space-sm);
}

.block__text {
  color: var(--color-ink-muted);
  margin: 0;
  max-width: 100%;
}

.block--invert {
  background: var(--color-ink);
  color: var(--color-cream);
}

.block--invert .block__label {
  color: var(--color-amber-light);
}

.block--invert .block__text {
  color: rgba(245, 240, 232, 0.85);
}

.block--cream {
  background: var(--color-cream);
}

.block--dark {
  background: var(--color-bg-dark);
  color: var(--color-cream);
}

.block--accent {
  background: linear-gradient(135deg, var(--color-amber) 0%, var(--color-amber-light) 100%);
  color: var(--color-ink);
}

@media (max-width: 768px) {
  .block__header--split {
    grid-template-columns: 1fr;
  }
}

/* 资产网格 */
.asset-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.asset-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: var(--space-lg);
  text-align: center;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.asset-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  border-color: rgba(232, 168, 85, 0.4);
}

.asset-card__icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  padding: 4px;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}

.asset-card:hover .asset-card__icon-wrap {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.08);
}

.asset-card__icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.asset-card__name {
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0.95;
}

.asset-card__ticker {
  font-size: 0.75rem;
  opacity: 0.75;
  letter-spacing: 0.05em;
}

.block--invert .asset-card {
  background: rgba(255, 255, 255, 0.05);
}

@media (max-width: 900px) {
  .asset-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.asset-stats {
  display: flex;
  gap: var(--space-2xl);
  justify-content: center;
  flex-wrap: wrap;
}

.asset-stats__item {
  text-align: center;
}

.asset-stats__num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-amber-light);
}

.asset-stats__desc {
  font-size: 0.9rem;
  opacity: 0.85;
}

@media (max-width: 600px) {
  .asset-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 功能卡片 */
.cap-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.cap-item {
  text-align: center;
  padding: var(--space-lg);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.cap-item:hover {
  transform: translateY(-4px);
  background: rgba(232, 168, 85, 0.06);
  border-color: rgba(232, 168, 85, 0.2);
}

.cap-item__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-md);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s var(--ease);
}

.cap-item:hover .cap-item__icon {
  transform: scale(1.05);
}

.cap-item__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cap-item__title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--space-xs);
}

.cap-item__desc {
  font-size: 0.9rem;
  color: var(--color-ink-muted);
  margin: 0;
}

@media (max-width: 900px) {
  .cap-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .cap-list {
    grid-template-columns: 1fr;
  }
}

/* 优势列表 */
.strength-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.strength-list__item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-cream-dark);
  border-radius: var(--radius);
  transition: background 0.2s var(--ease);
}

.strength-list__item:hover {
  background: rgba(255, 255, 255, 0.5);
}

.strength-list__item:last-child {
  border-bottom: none;
}

.strength-list__dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--color-amber);
}

.strength-list__item h4 {
  margin: 0 0 var(--space-xs);
  font-size: 1.1rem;
}

.strength-list__item p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-ink-muted);
}

/* 安全卡片 */
.safety-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.safety-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: var(--space-xl);
  text-align: center;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.safety-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.09);
}

.safety-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  color: var(--color-amber-light);
}

.safety-card__icon svg {
  width: 100%;
  height: 100%;
}

.safety-card h3 {
  font-size: 1.1rem;
  margin: 0 0 var(--space-sm);
}

.safety-card p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
}

@media (max-width: 700px) {
  .safety-grid {
    grid-template-columns: 1fr;
  }
}

/* 教程步骤 */
.howto-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.howto-list__step {
  position: relative;
  padding: var(--space-xl);
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-amber);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.howto-list__step:hover {
  transform: translateX(4px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.howto-list__num {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-amber);
  opacity: 0.5;
}

.howto-list__step h3 {
  font-size: 1.1rem;
  margin: 0 0 var(--space-sm);
}

.howto-list__step p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-ink-muted);
}

@media (max-width: 700px) {
  .howto-list {
    grid-template-columns: 1fr;
  }
}

/* FAQ */
.faq-list {
  margin: 0;
}

.faq-list__item {
  border-bottom: 1px solid var(--color-cream-dark);
  padding: var(--space-lg) 0;
}

.faq-list__item:last-child {
  border-bottom: none;
}

.faq-list__q {
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
  cursor: pointer;
  padding-right: 2rem;
  position: relative;
  transition: color 0.2s var(--ease);
}

.faq-list__q::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  border-right: 2px solid var(--color-ink-muted);
  border-bottom: 2px solid var(--color-ink-muted);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease);
}

.faq-list__item--accordion.is-open .faq-list__q::after {
  transform: rotate(-135deg);
}

.faq-list__item--accordion .faq-list__q:hover {
  color: var(--color-amber);
}

.faq-list__a {
  margin: var(--space-sm) 0 0;
  font-size: 0.95rem;
  color: var(--color-ink-muted);
  line-height: 1.7;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}

.faq-list__item--accordion.is-open .faq-list__a {
  max-height: 300px;
}

/* 下载区 */
.download-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.download-btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s var(--ease);
}

.download-btn:hover {
  transform: translateY(-3px);
}

.download-btn--primary {
  background: var(--color-ink);
  color: #fff;
}

.download-btn--nolink {
  cursor: default;
  display: inline-block;
}

/* 页脚 */
.foot {
  background: var(--color-ink);
  color: var(--color-cream);
  padding: var(--space-2xl) var(--space-md);
}

.foot__inner {
  max-width: 1560px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  text-align: center;
}

.foot__brand {
  margin-bottom: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.foot__brand-img {
  width: 32px;
  height: 32px;
}

.foot__brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
}

.foot__brand-desc {
  font-size: 0.85rem;
  opacity: 0.8;
}

.foot__links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.foot__links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s var(--ease);
}

.foot__links a:hover {
  color: #fff;
}

.foot__copy {
  font-size: 0.8rem;
  opacity: 0.6;
  margin: 0;
}

/* 动效：滚动淡入 */
[data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate-delay="1"] { transition-delay: 0.05s; }
[data-animate-delay="2"] { transition-delay: 0.1s; }
[data-animate-delay="3"] { transition-delay: 0.15s; }
[data-animate-delay="4"] { transition-delay: 0.2s; }
[data-animate-delay="5"] { transition-delay: 0.25s; }

/* 返回顶部 */
.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--color-amber);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease), transform 0.3s var(--ease);
  z-index: 90;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--color-amber-light);
  transform: translateY(-2px);
}

.back-top svg {
  width: 24px;
  height: 24px;
}

/* 导航高亮 */
.masthead__link.is-active {
  font-weight: 600;
}

.masthead--scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}