/* ==========================================================
   Nayax OEM Guide All in One - 全站样式
   自适应：手机（<640px）/ 平板（640-1023px）/ 桌面（>=1024px）
   ========================================================== */

:root {
  --yellow: #ffcd00;
  --yellow-dark: #e6b800;
  --dark: #262626;
  --dark-2: #3a3a3a;
  --gray-1: #f6f6f4;
  --gray-2: #e8e8e4;
  --gray-3: #6b6b66;
  --white: #ffffff;
  --radius: 16px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 10px 28px rgba(0, 0, 0, 0.14);
  --maxw: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC",
    "WenQuanYi Micro Hei", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--dark);
  background: var(--white);
  /* 适配刘海屏 / 圆角屏 */
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--dark);
  color: var(--white);
  padding-top: env(safe-area-inset-top);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  flex: none;
  background: var(--yellow);
  color: var(--dark);
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.4;
}

.brand-name {
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-links {
  display: none;
  gap: 4px;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: #dcdcd6;
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--dark-2);
  color: var(--yellow);
}

/* 手机端汉堡按钮 */
.menu-btn {
  flex: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.menu-btn:hover,
.menu-btn:focus-visible {
  background: var(--dark-2);
}

.menu-btn span,
.menu-btn span::before,
.menu-btn span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  transition: transform 0.2s, background 0.2s;
}

.menu-btn span::before,
.menu-btn span::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-btn span::before { top: -7px; }
.menu-btn span::after { top: 7px; }

.menu-btn[aria-expanded="true"] span { background: transparent; }
.menu-btn[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

/* 手机端展开的菜单 */
.nav-links.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--dark);
  padding: 8px 20px 16px;
  border-top: 1px solid var(--dark-2);
}

.nav-links.open a {
  padding: 14px 8px;
  font-size: 16px;
  min-height: 44px;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--yellow) 0%, #ffe066 100%);
  padding: 44px 0 52px;
}

.hero-tag {
  display: inline-block;
  background: var(--dark);
  color: var(--yellow);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero .subtitle {
  margin: 0 0 14px;
  font-size: clamp(18px, 4vw, 26px);
  font-weight: 700;
}

.hero p.lead {
  margin: 0 0 24px;
  max-width: 640px;
  font-size: clamp(15px, 2.6vw, 18px);
  color: #3b3500;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 999px;
  background: var(--dark);
  color: var(--white);
  font-weight: 700;
  font-size: 16px;
  transition: transform 0.2s, background 0.2s;
}

.btn:hover,
.btn:focus-visible {
  background: #000;
  transform: translateY(-2px);
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 48px 0;
}

.section.alt {
  background: var(--gray-1);
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0 0 6px;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.3;
}

.section-head p {
  margin: 0;
  color: var(--gray-3);
}

/* ---------- 功能大按钮 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr; /* 手机：1 列 */
  gap: 16px;
}

.feature-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--gray-2);
  border-radius: var(--radius);
  padding: 20px;
  min-height: 96px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.feature-card:hover,
.feature-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--yellow);
}

.feature-card:active {
  transform: scale(0.98);
}

.feature-icon {
  flex: none;
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--yellow);
  font-size: 28px;
  line-height: 1;
}

.feature-body {
  min-width: 0;
  flex: 1;
}

.feature-body h3 {
  margin: 0 0 2px;
  font-size: 18px;
  line-height: 1.35;
}

.feature-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--gray-3);
}

.feature-arrow {
  flex: none;
  font-size: 22px;
  color: var(--gray-3);
  transition: transform 0.2s, color 0.2s;
}

.feature-card:hover .feature-arrow,
.feature-card:focus-visible .feature-arrow {
  transform: translateX(4px);
  color: var(--dark);
}

/* ---------- Nayax 介绍 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.about-text p {
  margin: 0 0 14px;
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr; /* 手机：2 列 */
  gap: 12px;
}

.stat {
  background: var(--white);
  border: 1px solid var(--gray-2);
  border-top: 4px solid var(--yellow);
  border-radius: 12px;
  padding: 16px 14px;
}

.stat strong {
  display: block;
  font-size: clamp(20px, 5vw, 28px);
  line-height: 1.2;
}

.stat span {
  font-size: 13px;
  color: var(--gray-3);
}

.biz-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.biz-list li {
  background: var(--white);
  border: 1px solid var(--gray-2);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 14px;
}

/* ---------- 子页面（占位页） ---------- */
.page-hero {
  background: var(--yellow);
  padding: 32px 0 36px;
}

.page-hero h1 {
  margin: 8px 0 6px;
  font-size: clamp(24px, 6vw, 40px);
  line-height: 1.25;
}

.page-hero p {
  margin: 0;
  max-width: 640px;
}

.crumb {
  font-size: 14px;
}

.crumb a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.placeholder {
  text-align: center;
  padding: 56px 20px;
  border: 2px dashed var(--gray-2);
  border-radius: var(--radius);
  background: var(--gray-1);
}

.placeholder .big {
  font-size: 48px;
  line-height: 1;
  margin-bottom: 12px;
}

.placeholder h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.placeholder p {
  margin: 0 auto 20px;
  max-width: 460px;
  color: var(--gray-3);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: #cfcfca;
  padding: 36px 0 calc(28px + env(safe-area-inset-bottom));
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.site-footer h4 {
  margin: 0 0 8px;
  color: var(--yellow);
  font-size: 15px;
}

.site-footer p {
  margin: 0 0 4px;
}

.copyright {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--dark-2);
  font-size: 13px;
  color: #98988f;
}

/* ==========================================================
   平板：>= 640px
   ========================================================== */
@media (min-width: 640px) {
  .container { padding: 0 28px; }
  .hero { padding: 64px 0 72px; }
  .section { padding: 64px 0; }
  .brand-name { font-size: 17px; }

  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}

/* ==========================================================
   桌面：>= 1024px
   ========================================================== */
@media (min-width: 1024px) {
  .menu-btn { display: none; }
  .nav-links { display: flex; }

  .hero { padding: 88px 0 96px; }

  .feature-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }

  .feature-card {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    padding: 28px 24px;
    min-height: 220px;
  }
  .feature-icon { width: 64px; height: 64px; font-size: 32px; }
  .feature-body h3 { font-size: 20px; margin-bottom: 6px; }
  .feature-body p { font-size: 15px; }
  .feature-arrow { align-self: flex-end; }

  .about-grid { grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
}

/* 超小屏（<360px）进一步收紧 */
@media (max-width: 359px) {
  .container { padding: 0 14px; }
  .brand-name { display: none; }
  .feature-card { padding: 16px; gap: 12px; }
  .feature-icon { width: 48px; height: 48px; font-size: 24px; }
}

/* 尊重系统“减少动态效果”设置 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* 无障碍：键盘焦点可见 */
:focus-visible {
  outline: 3px solid var(--dark);
  outline-offset: 2px;
}
.site-header :focus-visible { outline-color: var(--yellow); }