/* ---------- section-advantages.css — 为什么选择我们（参考稿：bento 网格 + 3D 倾斜 + 徽章/发光图标） ----------
   bento：≥1024 六列 + 行高 200px；首卡深色 3×2 大卡（徽章/迷你数据/链接），其余白卡 3×1；
   动效：hover 3D 倾斜（--lf-tx/--lf-ty，JS 设置、reduced-motion 跳过）、图标发光、箭头位移。
   令牌：G §13，禁裸 hex */

.lf-advantage {
  padding-block: var(--section-pad-lg) var(--section-pad);
  background: var(--thead); /* 浅灰底带（恢复客户 2026-08 之前的底色） */
}

.lf-advantage__header {
  text-align: center;
  margin-block-end: var(--space-9);
}

.lf-advantage__title {
  margin: 0;
}

.lf-advantage__title em {
  color: var(--acc);
  font-style: normal;
}

.lf-advantage__sub {
  max-width: 60ch;
  margin: var(--space-3) auto 0;
  color: var(--ink-2);
  line-height: var(--leading-body);
}

.lf-advantage__header + .lf-advantage__grid {
  margin-block-start: 0;
}

/* ---------- bento 网格 ---------- */
.lf-advantage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  width: 100%;
  max-width: 1240px; /* 适合的宽度：居中限宽 */
  margin-inline: auto;
}

@media (min-width: 640px) {
  .lf-advantage__grid {
    grid-template-columns: 1fr 1fr;
  }

  .lf-advantage__feat--hero {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .lf-advantage__grid {
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: 216px;
    gap: var(--space-4);
  }

  /* 首卡：深色大卡 3×2（参考稿 lf-card-dark 定位） */
  .lf-advantage__feat--hero {
    grid-column: span 3;
    grid-row: span 2;
  }

  .lf-advantage__feat:not(.lf-advantage__feat--hero) {
    grid-column: span 3;
  }
}

/* ---------- 卡片 ---------- */
.lf-advantage__feat {
  position: relative;
  overflow: hidden;
  border-radius: 24px; /* 实例 .lf-card 1.5rem */
  border: 1px solid rgba(20, 30, 34, 0.05);
  background: var(--bg-white);
  box-shadow: 0 1px 2px rgba(20, 30, 34, 0.05), 0 8px 24px -8px rgba(20, 30, 34, 0.09);
  padding: 28px;
  perspective: 900px;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease),
    border-color 0.45s var(--ease);
}

/* 3D 倾斜主体（JS 设置 --lf-tx/--lf-ty；reduced-motion 由 JS 跳过） */
.lf-advantage__tilt {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height: 100%;
  transform: rotateX(var(--lf-tx, 0deg)) rotateY(var(--lf-ty, 0deg)) translateZ(0);
  transition: transform var(--duration-base) var(--ease);
}

/* 实例 .lf-card:hover：上浮 14px + 微放大 + 朱砂描边/光环 + 深投影 */
.lf-advantage__feat:hover {
  transform: translateY(-14px) scale(1.012);
  border-color: color-mix(in srgb, var(--acc) 34%, transparent);
  box-shadow: 0 2px 4px rgba(20, 30, 34, 0.06), 0 32px 64px -16px rgba(20, 30, 34, 0.28),
    0 0 0 1px color-mix(in srgb, var(--acc) 28%, transparent),
    0 0 28px -4px color-mix(in srgb, var(--acc) 25%, transparent);
}

/* 光标聚光灯（实例 .lf-glow：跟随鼠标的径向光斑） */
.lf-advantage__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(220px circle at var(--lf-mx, 50%) var(--lf-my, 50%),
    color-mix(in srgb, var(--acc) 12%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s var(--duration-base);
  pointer-events: none;
}

.lf-advantage__feat:hover .lf-advantage__glow {
  opacity: 1;
}

/* 顶部行：徽章（左）+ 图标（右） */
.lf-advantage__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  margin-block-end: var(--space-5);
}

.lf-advantage__badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding-inline: var(--space-3);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--acc) 12%, var(--bg));
  color: var(--pri);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* 图标：实例 lf-icon-base 风格（渐变圆角方块 + 外光晕 + 悬停缩放旋转；纹样按位置换色） */
.lf-advantage__icon {
  position: relative;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  border-radius: 18px;
  color: var(--text-inverse);
  background: linear-gradient(145deg, var(--pri2), var(--deep));
  box-shadow: 0 6px 14px -4px rgba(20, 30, 34, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: transform 0.5s var(--ease);
}

/* 每块图标主题色（实例：盾=绿 / 闪电=橙 / 图表=青 / 客服=紫 / 钱包=青） */
.lf-advantage__feat:nth-child(2) .lf-advantage__icon { background: linear-gradient(145deg, var(--acc-hi), var(--acc)); }
.lf-advantage__feat:nth-child(3) .lf-advantage__icon { background: linear-gradient(145deg, var(--up-hi), var(--up)); }
.lf-advantage__feat:nth-child(5) .lf-advantage__icon { background: linear-gradient(145deg, var(--pri3), var(--pri)); }

.lf-advantage__icon-glow {
  position: absolute;
  inset: -6px;
  z-index: -1;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--acc) 30%, transparent), transparent 70%);
  filter: blur(14px);
  opacity: 0.45;
  transition: opacity 0.4s var(--duration-base), transform 0.5s var(--ease);
}

.lf-advantage__feat:nth-child(2) .lf-advantage__icon-glow { background: radial-gradient(circle at 50% 50%, rgba(200, 67, 43, 0.4), transparent 70%); }
.lf-advantage__feat:nth-child(3) .lf-advantage__icon-glow { background: radial-gradient(circle at 50% 50%, rgba(47, 191, 143, 0.4), transparent 70%); }
.lf-advantage__feat:nth-child(5) .lf-advantage__icon-glow { background: radial-gradient(circle at 50% 50%, rgba(61, 112, 120, 0.42), transparent 70%); }

.lf-advantage__icon svg {
  transition: transform 0.5s var(--ease); /* 实例 .lf-icon-svg */
}

.lf-advantage__feat:hover .lf-advantage__icon {
  transform: scale(1.08) rotate(-6deg);
}

.lf-advantage__feat:hover .lf-advantage__icon svg {
  transform: scale(1.12);
}

.lf-advantage__feat:hover .lf-advantage__icon-glow {
  opacity: 1;
  transform: scale(1.1);
}

.lf-advantage__feat-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
}

.lf-advantage__feat-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* 首卡（深色大卡） */
.lf-advantage__feat--hero {
  background: linear-gradient(150deg, var(--pri2) 0%, var(--pri) 58%, var(--deep) 100%);
  border-color: rgba(255, 255, 255, 0.12);
  padding: 36px;
}

/* 深卡装饰：点阵网格 + 光球 */
.lf-advantage__feat--hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1.4px);
  background-size: 20px 20px;
  mask-image: linear-gradient(120deg, rgba(0, 0, 0, 0.7), transparent 60%);
  -webkit-mask-image: linear-gradient(120deg, rgba(0, 0, 0, 0.7), transparent 60%);
  pointer-events: none;
}

.lf-advantage__feat--hero::after {
  content: "";
  position: absolute;
  inset-inline-end: -14%;
  inset-block-end: -30%;
  width: 60%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 67, 43, 0.35), transparent 70%);
  filter: blur(46px);
  animation: lf-orb-float 6s ease-in-out infinite; /* 实例 lf-orb-float */
  pointer-events: none;
}

@keyframes lf-orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-10px, -14px) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
  .lf-advantage__feat--hero::after {
    animation: none;
  }
}

.lf-advantage__feat--hero .lf-advantage__badge {
  background: rgba(255, 255, 255, 0.14);
  color: var(--acc-hi);
}

.lf-advantage__feat--hero .lf-advantage__icon {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--acc-hi);
}

.lf-advantage__feat--hero .lf-advantage__icon-glow {
  background: radial-gradient(circle, rgba(222, 98, 72, 0.4), transparent 68%);
}

.lf-advantage__feat--hero .lf-advantage__feat-title {
  color: var(--text-inverse);
}

.lf-advantage__feat--hero .lf-advantage__feat-desc {
  color: rgba(255, 255, 255, 0.8);
}

.lf-advantage__tilt > * {
  position: relative;
  z-index: 1;
}

/* 首卡：徽章右置、图标左置（客户 2026-09；其余卡保持图标右上） */
.lf-advantage__feat--hero .lf-advantage__top {
  flex-direction: row;
}

.lf-advantage__feat--hero .lf-advantage__badge {
  order: 2;
}

.lf-advantage__feat--hero .lf-advantage__icon {
  order: 1;
}

/* 迷你数据（深卡）：值 --up-hi 大数字 + 标签，竖分隔 */
.lf-advantage__mini-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin: var(--space-5) 0 0;
  padding: 0;
  list-style: none;
}

.lf-advantage__mini {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.lf-advantage__mini + .lf-advantage__mini {
  padding-inline-start: var(--space-5);
  border-inline-start: 1px solid rgba(255, 255, 255, 0.14);
}

.lf-advantage__mini-num {
  font-family: var(--num-font);
  font-size: 24px;
  font-weight: 800;
  color: var(--up-hi);
}

.lf-advantage__mini-lbl {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

/* 链接箭头（参考稿 lf-arrow：hover 位移） */
.lf-advantage__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-block-start: auto;
  padding-block-start: var(--space-5);
  font-size: 14px;
  font-weight: 700;
  color: var(--acc);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease);
}

.lf-advantage__link svg {
  transition: transform var(--duration-base) var(--ease);
}

.lf-advantage__link:hover {
  color: var(--acc-hi);
}

.lf-advantage__link:hover svg {
  transform: translateX(4px);
}

.lf-advantage__feat--hero .lf-advantage__link {
  color: var(--up-hi);
}

/* ---------- 响应式微调 ---------- */
@media (max-width: 640px) {
  .lf-advantage__feat {
    min-height: 0;
  }

  .lf-advantage__mini-stats {
    gap: var(--space-3);
  }
}