:root {
  --k4d-primary: #101a33;
  --k4d-primary-soft: #1b2c52;
  --k4d-primary-deep: #0a1124;
  --k4d-accent: #26d0a8;
  --k4d-accent-deep: #11a884;
  --k4d-gold: #f7b500;
  --k4d-bg: #f5f7fb;
  --k4d-ink: #111a2b;
  --k4d-muted: #5d6a83;
  --k4d-line: #e3e9f3;
  --k4d-white: #ffffff;
  --k4d-radius: 14px;
  --k4d-radius-lg: 24px;
  --k4d-shadow: 0 20px 46px rgba(16, 26, 51, .12);
  --k4d-shadow-soft: 0 10px 26px rgba(16, 26, 51, .08);
  --k4d-wrap: 1200px;
  --k4d-ease: cubic-bezier(.22, .7, .3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  color: var(--k4d-ink);
  background: var(--k4d-bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
p {
  margin: 0;
}

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

.container {
  width: 100%;
  max-width: var(--k4d-wrap);
  margin: 0 auto;
  padding: 0 20px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .03em;
  cursor: pointer;
  background: var(--k4d-accent);
  color: var(--k4d-primary-deep);
  box-shadow: 0 12px 26px rgba(38, 208, 168, .32);
  transition: transform .3s var(--k4d-ease), box-shadow .3s var(--k4d-ease), background .3s var(--k4d-ease), color .3s var(--k4d-ease), border-color .3s var(--k4d-ease);
  white-space: nowrap;
}

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

.btn-accent {
  background: var(--k4d-accent);
  color: var(--k4d-primary-deep);
  box-shadow: 0 12px 26px rgba(38, 208, 168, .32);
}

.btn-accent:hover {
  background: var(--k4d-accent-deep);
  color: var(--k4d-white);
}
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: var(--k4d-white);
  border-color: rgba(255, 255, 255, .34);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  border-color: var(--k4d-accent);
  color: var(--k4d-accent);
}

.btn-solid {
  background: var(--k4d-primary);
  color: var(--k4d-white);
  box-shadow: 0 12px 26px rgba(16, 26, 51, .22);
}

.btn-solid:hover {
  background: var(--k4d-primary-soft);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s var(--k4d-ease), transform .8s var(--k4d-ease);
}

[data-reveal][data-shown="1"] {
  opacity: 1;
  transform: none;
}

[data-delay="1"] {
  transition-delay: .09s;
}

[data-delay="2"] {
  transition-delay: .18s;
}

[data-delay="3"] {
  transition-delay: .27s;
}

[data-delay="4"] {
  transition-delay: .36s;
}

[data-delay="5"] {
  transition-delay: .45s;
}

/* ---------- 顶部条 ---------- */
.topbar-k4d {
  background: var(--k4d-primary-deep);
  color: rgba(255, 255, 255, .72);
  font-size: 13px;
  letter-spacing: .04em;
}

.topbar-k4d-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 40px;
  flex-wrap: wrap;
}

.topbar-k4d-list {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.topbar-k4d-list li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.topbar-k4d-list i {
  color: var(--k4d-accent);
}

.topbar-k4d-note {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--k4d-accent);
  font-weight: 600;
}

/* ---------- 导航 ---------- */
.header-k4d {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .35s var(--k4d-ease), background .35s var(--k4d-ease), border-color .35s var(--k4d-ease);
}

.header-k4d-stuck {
  box-shadow: 0 10px 30px rgba(16, 26, 51, .12);
  border-color: var(--k4d-line);
}

.header-k4d-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.header-k4d-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-k4d-logo {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--k4d-primary);
  padding: 4px;
}

.header-k4d-brandtext {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.header-k4d-name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--k4d-primary);
}

.header-k4d-tagline {
  font-size: 12px;
  color: var(--k4d-muted);
  letter-spacing: .12em;
}

.nav-k4d-list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-k4d-link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--k4d-ink);
  transition: color .3s var(--k4d-ease), background .3s var(--k4d-ease);
}

.nav-k4d-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--k4d-accent);
  transform: translateX(-50%);
  transition: width .3s var(--k4d-ease);
}

.nav-k4d-link:hover {
  color: var(--k4d-primary);
}

.nav-k4d-link:hover::after {
  width: 26px;
}

.nav-k4d-link[aria-current="page"] {
  color: var(--k4d-accent-deep);
}

.nav-k4d-link[aria-current="page"]::after {
  width: 26px;
}

.nav-k4d-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--k4d-line);
  border-radius: 12px;
  background: var(--k4d-white);
  color: var(--k4d-primary);
  font-size: 18px;
  cursor: pointer;
}

/* ---------- Hero（方案 B：双背景轮播 + 居中标语） ---------- */
.hero-k4d {
  position: relative;
  isolation: isolate;
  min-height: 660px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--k4d-primary-deep);
}

.hero-k4d-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-k4d-slide {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.08);
  transition: opacity 1.4s var(--k4d-ease), transform 7s linear;
}

.hero-k4d-slide-on {
  opacity: 1;
  transform: scale(1);
}

.hero-k4d-veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 50% 30%, rgba(38, 208, 168, .22), transparent 58%),
    linear-gradient(180deg, rgba(10, 17, 36, .86) 0%, rgba(16, 26, 51, .78) 46%, rgba(10, 17, 36, .94) 100%);
}

.hero-k4d-inner {
  position: relative;
  text-align: center;
  color: var(--k4d-white);
  padding: 120px 0 110px;
  max-width: 940px;
}

.hero-k4d-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid rgba(38, 208, 168, .5);
  background: rgba(38, 208, 168, .12);
  color: var(--k4d-accent);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .16em;
  margin-bottom: 26px;
}

.hero-k4d-slogan {
  font-size: clamp(30px, 5.2vw, 60px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: .01em;
  margin-bottom: 24px;
  text-shadow: 0 12px 34px rgba(0, 0, 0, .35);
}

.hero-k4d-slogan em {
  font-style: normal;
  color: var(--k4d-accent);
}

.hero-k4d-lead {
  font-size: 17px;
  line-height: 1.95;
  color: rgba(255, 255, 255, .82);
  max-width: 760px;
  margin: 0 auto 38px;
}

.hero-k4d-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 62px;
}

.hero-k4d-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  border-top: 1px solid rgba(255, 255, 255, .16);
  padding-top: 34px;
}

.hero-k4d-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-k4d-stat strong {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--k4d-accent);
  font-weight: 800;
}

.hero-k4d-stat span {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .66);
  letter-spacing: .08em;
}

.hero-k4d-dots {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.hero-k4d-dot {
  width: 34px;
  height: 4px;
  border: 0;
  border-radius: 4px;
  background: rgba(255, 255, 255, .34);
  cursor: pointer;
  padding: 0;
  transition: background .3s var(--k4d-ease), width .3s var(--k4d-ease);
}

.hero-k4d-dot-on {
  background: var(--k4d-accent);
  width: 52px;
}

/* ---------- 通用区块 ---------- */
.band-k4d {
  padding: 92px 0;
  position: relative;
}

.band-k4d-tint {
  background: #eef2fa;
}

.band-k4d-light {
  background: var(--k4d-bg);
}

.band-k4d-white {
  background: var(--k4d-white);
}

.band-k4d-dark {
  background: var(--k4d-primary);
  color: var(--k4d-white);
}

.band-k4d-head {
  max-width: 780px;
  margin: 0 auto 54px;
  text-align: center;
}

.band-k4d-eyebrow {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 999px;
  background: rgba(38, 208, 168, .14);
  color: var(--k4d-accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  margin-bottom: 18px;
}

.band-k4d-dark .band-k4d-eyebrow {
  background: rgba(38, 208, 168, .16);
  color: var(--k4d-accent);
}

.band-k4d-name {
  font-size: clamp(25px, 3.3vw, 40px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: .01em;
  margin-bottom: 16px;
}

.band-k4d-lead {
  font-size: 16.5px;
  color: var(--k4d-muted);
  line-height: 1.95;
}

.band-k4d-dark .band-k4d-lead {
  color: rgba(255, 255, 255, .72);
}

.band-k4d-more {
  text-align: center;
  margin-top: 44px;
}

/* ---------- 关于我们 ---------- */
.story-k4d-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 58px;
  align-items: center;
}

.story-k4d-media {
  position: relative;
}

.story-k4d-frame {
  border-radius: var(--k4d-radius-lg);
  overflow: hidden;
  box-shadow: var(--k4d-shadow);
}

.story-k4d-frame img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  transition: transform .9s var(--k4d-ease);
}

.story-k4d-media:hover .story-k4d-frame img {
  transform: scale(1.05);
}

.story-k4d-badge {
  position: absolute;
  right: -18px;
  bottom: -24px;
  background: var(--k4d-white);
  border-radius: 18px;
  padding: 18px 24px;
  box-shadow: var(--k4d-shadow);
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 260px;
}

.story-k4d-badge i {
  font-size: 30px;
  color: var(--k4d-accent-deep);
}

.story-k4d-badge strong {
  display: block;
  font-size: 24px;
  color: var(--k4d-primary);
  line-height: 1.2;
}

.story-k4d-badge span {
  font-size: 13px;
  color: var(--k4d-muted);
}

.story-k4d-para {
  color: var(--k4d-muted);
  margin-bottom: 18px;
  line-height: 1.98;
}

.story-k4d-points {
  display: grid;
  gap: 14px;
  margin: 26px 0 32px;
}

.story-k4d-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  transition: transform .3s var(--k4d-ease), border-color .3s var(--k4d-ease), box-shadow .3s var(--k4d-ease);
}

.story-k4d-point:hover {
  transform: translateX(6px);
  border-color: rgba(38, 208, 168, .55);
  box-shadow: var(--k4d-shadow-soft);
}

.story-k4d-point i {
  color: var(--k4d-accent-deep);
  margin-top: 4px;
}

.story-k4d-point strong {
  display: block;
  color: var(--k4d-primary);
  font-size: 16px;
}

.story-k4d-point span {
  font-size: 14px;
  color: var(--k4d-muted);
}

/* ---------- 服务 ---------- */
.expertise-k4d-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.expertise-k4d-item {
  position: relative;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius-lg);
  padding: 32px 26px 28px;
  overflow: hidden;
  transition: transform .4s var(--k4d-ease), box-shadow .4s var(--k4d-ease), border-color .4s var(--k4d-ease);
}

.expertise-k4d-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--k4d-accent), var(--k4d-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--k4d-ease);
}

.expertise-k4d-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--k4d-shadow);
  border-color: transparent;
}

.expertise-k4d-item:hover::before {
  transform: scaleX(1);
}

.expertise-k4d-index {
  position: absolute;
  right: 18px;
  top: 14px;
  font-size: 42px;
  font-weight: 800;
  color: rgba(16, 26, 51, .06);
  line-height: 1;
}

.expertise-k4d-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(38, 208, 168, .12);
  color: var(--k4d-accent-deep);
  font-size: 22px;
  margin-bottom: 18px;
  transition: background .35s var(--k4d-ease), color .35s var(--k4d-ease), transform .35s var(--k4d-ease);
}

.expertise-k4d-item:hover .expertise-k4d-icon {
  background: var(--k4d-primary);
  color: var(--k4d-accent);
  transform: rotate(-6deg);
}

.expertise-k4d-name {
  font-size: 18.5px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin-bottom: 10px;
}

.expertise-k4d-text {
  font-size: 14.5px;
  color: var(--k4d-muted);
  line-height: 1.85;
}

/* ---------- 优势 ---------- */
.edge-k4d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.edge-k4d-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--k4d-white);
  border-radius: var(--k4d-radius-lg);
  padding: 26px 24px;
  border: 1px solid var(--k4d-line);
  transition: transform .35s var(--k4d-ease), box-shadow .35s var(--k4d-ease);
}

.edge-k4d-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--k4d-shadow-soft);
}

.edge-k4d-mark {
  flex: 0 0 auto;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--k4d-primary), var(--k4d-primary-soft));
  color: var(--k4d-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
}

.edge-k4d-name {
  font-size: 17.5px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin-bottom: 6px;
}

.edge-k4d-text {
  font-size: 14.5px;
  color: var(--k4d-muted);
  line-height: 1.8;
}

/* ---------- 案例 ---------- */
.showcase-k4d-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.showcase-k4d-card {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .4s var(--k4d-ease), box-shadow .4s var(--k4d-ease);
}

.showcase-k4d-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--k4d-shadow);
}

.showcase-k4d-media {
  position: relative;
  overflow: hidden;
  height: 210px;
}

.showcase-k4d-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--k4d-ease);
}

.showcase-k4d-card:hover .showcase-k4d-media img {
  transform: scale(1.08);
}

.showcase-k4d-cat {
  position: absolute;
  left: 16px;
  top: 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(16, 26, 51, .86);
  color: var(--k4d-accent);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
}

.showcase-k4d-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.showcase-k4d-name {
  font-size: 17.5px;
  font-weight: 800;
  color: var(--k4d-primary);
  line-height: 1.5;
}

.showcase-k4d-text {
  font-size: 14.5px;
  color: var(--k4d-muted);
  line-height: 1.82;
  flex: 1;
}

.showcase-k4d-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #8994a9;
  flex-wrap: wrap;
}

.showcase-k4d-meta i {
  color: var(--k4d-accent-deep);
  margin-right: 5px;
}

.showcase-k4d-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--k4d-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.showcase-k4d-link i {
  transition: transform .3s var(--k4d-ease);
}

.showcase-k4d-link:hover {
  color: var(--k4d-accent-deep);
}

.showcase-k4d-link:hover i {
  transform: translateX(5px);
}

/* ---------- 首页文章块 ---------- */
.updates-k4d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.updates-k4d-card {
  background: var(--k4d-white);
  border-radius: var(--k4d-radius);
  border: 1px solid var(--k4d-line);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .4s var(--k4d-ease), box-shadow .4s var(--k4d-ease);
}

.updates-k4d-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--k4d-shadow);
}

.updates-k4d-media {
  height: 220px;
  overflow: hidden;
}

.updates-k4d-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--k4d-ease);
}

.updates-k4d-card:hover .updates-k4d-media img {
  transform: scale(1.07);
}

.updates-k4d-body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.updates-k4d-tag {
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--k4d-accent-deep);
  background: rgba(38, 208, 168, .12);
}

.updates-k4d-name {
  font-size: 18.5px;
  font-weight: 800;
  color: var(--k4d-primary);
  line-height: 1.52;
}

.updates-k4d-text {
  font-size: 14.5px;
  color: var(--k4d-muted);
  line-height: 1.82;
  flex: 1;
}

.updates-k4d-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: #8994a9;
  flex-wrap: wrap;
}

.updates-k4d-meta i {
  color: var(--k4d-accent-deep);
  margin-right: 5px;
}

.updates-k4d-link {
  color: var(--k4d-primary);
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.updates-k4d-link i {
  transition: transform .3s var(--k4d-ease);
}

.updates-k4d-link:hover {
  color: var(--k4d-accent-deep);
}

.updates-k4d-link:hover i {
  transform: translateX(5px);
}

/* ---------- 工作流程 ---------- */
.journey-k4d-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  position: relative;
}

.journey-k4d-track::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(38, 208, 168, .55) 0 10px, transparent 10px 20px);
}

.journey-k4d-step {
  position: relative;
  text-align: center;
  padding: 0 6px;
}

.journey-k4d-index {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--k4d-white);
  border: 2px solid var(--k4d-accent);
  color: var(--k4d-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 800;
  position: relative;
  z-index: 2;
  transition: background .35s var(--k4d-ease), color .35s var(--k4d-ease), transform .35s var(--k4d-ease);
}

.journey-k4d-step:hover .journey-k4d-index {
  background: var(--k4d-primary);
  color: var(--k4d-accent);
  transform: translateY(-5px);
}

.journey-k4d-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin-bottom: 8px;
}

.journey-k4d-text {
  font-size: 14px;
  color: var(--k4d-muted);
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.crew-k4d-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 22px;
}

.crew-k4d-member {
  text-align: center;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius-lg);
  padding: 26px 18px 24px;
  transition: transform .4s var(--k4d-ease), box-shadow .4s var(--k4d-ease), border-color .4s var(--k4d-ease);
}

.crew-k4d-member:hover {
  transform: translateY(-8px);
  box-shadow: var(--k4d-shadow);
  border-color: rgba(38, 208, 168, .45);
}

.crew-k4d-photo {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--k4d-white);
  box-shadow: 0 10px 24px rgba(16, 26, 51, .16);
  transition: transform .4s var(--k4d-ease);
}

.crew-k4d-member:hover .crew-k4d-photo {
  transform: scale(1.06);
}

.crew-k4d-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--k4d-primary);
}

.crew-k4d-role {
  display: inline-block;
  margin: 6px 0 10px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: var(--k4d-accent-deep);
  background: rgba(38, 208, 168, .12);
}

.crew-k4d-text {
  font-size: 13.5px;
  color: var(--k4d-muted);
  line-height: 1.75;
}

.crew-k4d-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.crew-k4d-social a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 26, 51, .06);
  color: var(--k4d-primary);
  font-size: 13px;
  transition: background .3s var(--k4d-ease), color .3s var(--k4d-ease);
}

.crew-k4d-social a:hover {
  background: var(--k4d-primary);
  color: var(--k4d-accent);
}

/* ---------- 评论 ---------- */
.voices-k4d-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.voices-k4d-item {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius-lg);
  padding: 28px 28px 24px;
  position: relative;
  transition: transform .35s var(--k4d-ease), box-shadow .35s var(--k4d-ease);
}

.voices-k4d-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--k4d-shadow-soft);
}

.voices-k4d-item::after {
  content: "\201C";
  position: absolute;
  right: 24px;
  top: 4px;
  font-size: 78px;
  color: rgba(38, 208, 168, .18);
  font-family: Georgia, serif;
  line-height: 1;
}

.voices-k4d-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.voices-k4d-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(38, 208, 168, .5);
}

.voices-k4d-stars {
  color: var(--k4d-gold);
  font-size: 13px;
  letter-spacing: 2px;
}

.voices-k4d-name {
  font-size: 16.5px;
  font-weight: 800;
  color: var(--k4d-primary);
}

.voices-k4d-role {
  font-size: 13px;
  color: var(--k4d-muted);
}

.voices-k4d-quote {
  font-size: 15px;
  color: var(--k4d-muted);
  line-height: 1.92;
}

/* ---------- 问答 ---------- */
.queries-k4d-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.queries-k4d-list {
  display: grid;
  gap: 14px;
}

.queries-k4d-item {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  overflow: hidden;
  transition: box-shadow .3s var(--k4d-ease), border-color .3s var(--k4d-ease);
}

.queries-k4d-item[data-open="1"] {
  border-color: rgba(38, 208, 168, .5);
  box-shadow: var(--k4d-shadow-soft);
}

.queries-k4d-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 24px;
  background: none;
  border: 0;
  text-align: left;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--k4d-primary);
  cursor: pointer;
}

.queries-k4d-q span i {
  color: var(--k4d-accent-deep);
  margin-right: 10px;
}

.queries-k4d-q i {
  color: var(--k4d-accent-deep);
  transition: transform .35s var(--k4d-ease);
  flex: 0 0 auto;
}

.queries-k4d-item[data-open="1"] .queries-k4d-q i {
  transform: rotate(45deg);
}

.queries-k4d-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s var(--k4d-ease), padding .45s var(--k4d-ease);
  padding: 0 24px;
  color: var(--k4d-muted);
  font-size: 14.8px;
  line-height: 1.92;
}

.queries-k4d-item[data-open="1"] .queries-k4d-a {
  max-height: 320px;
  padding: 0 24px 22px;
}

/* ---------- 合作伙伴 ---------- */
.allies-k4d-wrap {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.allies-k4d-track {
  display: flex;
  gap: 22px;
  width: max-content;
  animation: k4dMarquee 32s linear infinite;
}

.allies-k4d-wrap:hover .allies-k4d-track {
  animation-play-state: paused;
}

.allies-k4d-logo {
  width: 132px;
  height: 82px;
  flex: 0 0 auto;
  object-fit: contain;
  padding: 14px;
  border-radius: var(--k4d-radius);
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  filter: grayscale(.35);
  transition: transform .35s var(--k4d-ease), filter .35s var(--k4d-ease), box-shadow .35s var(--k4d-ease);
}

.allies-k4d-logo:hover {
  transform: translateY(-5px);
  filter: grayscale(0);
  box-shadow: var(--k4d-shadow-soft);
}

@keyframes k4dMarquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

/* ---------- 荣誉 ---------- */
.laurels-k4d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.laurels-k4d-item {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--k4d-radius-lg);
  padding: 32px 26px;
  text-align: center;
  transition: transform .35s var(--k4d-ease), background .35s var(--k4d-ease), border-color .35s var(--k4d-ease);
}

.laurels-k4d-item:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, .1);
  border-color: rgba(38, 208, 168, .5);
}

.laurels-k4d-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(247, 181, 0, .16);
  color: var(--k4d-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
}

.laurels-k4d-value {
  font-size: 38px;
  font-weight: 800;
  color: var(--k4d-accent);
  line-height: 1.25;
  letter-spacing: .01em;
}

.laurels-k4d-value em {
  font-style: normal;
  font-size: 16px;
  margin-left: 4px;
  color: rgba(255, 255, 255, .7);
}

.laurels-k4d-label {
  margin-top: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--k4d-white);
}

.laurels-k4d-note {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
}

/* ---------- 联系我们 ---------- */
.reach-k4d-grid {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: 48px;
  align-items: start;
}

.reach-k4d-info {
  display: grid;
  gap: 18px;
}

.reach-k4d-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  padding: 22px 24px;
  transition: transform .3s var(--k4d-ease), box-shadow .3s var(--k4d-ease);
}

.reach-k4d-row:hover {
  transform: translateX(6px);
  box-shadow: var(--k4d-shadow-soft);
}

.reach-k4d-icon {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(38, 208, 168, .13);
  color: var(--k4d-accent-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
}

.reach-k4d-label {
  font-size: 13px;
  letter-spacing: .1em;
  color: #8994a9;
  text-transform: uppercase;
}

.reach-k4d-value {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--k4d-primary);
  line-height: 1.6;
  word-break: break-all;
}

.reach-k4d-note {
  font-size: 14px;
  color: var(--k4d-muted);
  line-height: 1.9;
  background: rgba(38, 208, 168, .09);
  border-left: 3px solid var(--k4d-accent);
  border-radius: 0 var(--k4d-radius) var(--k4d-radius) 0;
  padding: 16px 20px;
}

.reach-k4d-form {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius-lg);
  padding: 32px;
  box-shadow: var(--k4d-shadow-soft);
}

.reach-k4d-formname {
  font-size: 20px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin-bottom: 6px;
}

.reach-k4d-formlead {
  font-size: 14px;
  color: var(--k4d-muted);
  margin-bottom: 22px;
}

.reach-k4d-field {
  margin-bottom: 16px;
}

.reach-k4d-fieldlabel {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--k4d-primary);
  margin-bottom: 7px;
}

.reach-k4d-input,
.reach-k4d-textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--k4d-line);
  border-radius: 12px;
  background: #fbfcfe;
  font-size: 15px;
  transition: border-color .3s var(--k4d-ease), box-shadow .3s var(--k4d-ease), background .3s var(--k4d-ease);
}

.reach-k4d-input:focus,
.reach-k4d-textarea:focus {
  outline: none;
  border-color: var(--k4d-accent);
  background: var(--k4d-white);
  box-shadow: 0 0 0 4px rgba(38, 208, 168, .16);
}

.reach-k4d-textarea {
  min-height: 128px;
  resize: vertical;
}

.reach-k4d-submit {
  width: 100%;
  border: 0;
  cursor: pointer;
}

.reach-k4d-feedback {
  margin-top: 14px;
  font-size: 14px;
  color: var(--k4d-accent-deep);
  min-height: 22px;
}

/* ---------- CTA ---------- */
.cta-k4d {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--k4d-primary) 0%, var(--k4d-primary-soft) 58%, #24386a 100%);
  padding: 88px 0;
}

.cta-k4d::before,
.cta-k4d::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(38, 208, 168, .28), transparent 68%);
  pointer-events: none;
}

.cta-k4d::before {
  width: 460px;
  height: 460px;
  top: -190px;
  right: -90px;
}

.cta-k4d::after {
  width: 360px;
  height: 360px;
  bottom: -180px;
  left: -80px;
}

.cta-k4d-inner {
  position: relative;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.cta-k4d-name {
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 800;
  color: var(--k4d-white);
  line-height: 1.34;
  margin-bottom: 18px;
}

.cta-k4d-text {
  font-size: 16px;
  color: rgba(255, 255, 255, .76);
  line-height: 1.95;
  margin-bottom: 34px;
}

.cta-k4d-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.footer-k4d {
  background: var(--k4d-primary-deep);
  color: rgba(255, 255, 255, .68);
}

.footer-k4d-main {
  padding: 66px 0 44px;
}

.footer-k4d-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
}

.footer-k4d-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.footer-k4d-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--k4d-primary-soft);
  padding: 4px;
}

.footer-k4d-brandname {
  font-size: 18px;
  font-weight: 800;
  color: var(--k4d-white);
  line-height: 1.3;
}

.footer-k4d-text {
  font-size: 14px;
  line-height: 1.95;
  margin-bottom: 20px;
}

.footer-k4d-social {
  display: flex;
  gap: 12px;
}

.footer-k4d-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .78);
  transition: background .3s var(--k4d-ease), color .3s var(--k4d-ease), border-color .3s var(--k4d-ease);
}

.footer-k4d-social a:hover {
  background: var(--k4d-accent);
  border-color: var(--k4d-accent);
  color: var(--k4d-primary-deep);
}

.footer-k4d-name {
  font-size: 16px;
  font-weight: 800;
  color: var(--k4d-white);
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.footer-k4d-name::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 18px;
  transform: translateY(-50%);
  border-radius: 3px;
  background: var(--k4d-accent);
}

.footer-k4d-links {
  display: grid;
  gap: 12px;
}

.footer-k4d-links a {
  font-size: 14px;
  transition: color .3s var(--k4d-ease), padding-left .3s var(--k4d-ease);
}

.footer-k4d-links a:hover {
  color: var(--k4d-accent);
  padding-left: 6px;
}

.footer-k4d-contact {
  display: grid;
  gap: 14px;
}

.footer-k4d-contact li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.7;
}

.footer-k4d-contact i {
  color: var(--k4d-accent);
  margin-top: 5px;
}

.footer-k4d-warn {
  margin-top: 38px;
  padding: 18px 22px;
  border-radius: var(--k4d-radius);
  border: 1px solid rgba(247, 181, 0, .28);
  background: rgba(247, 181, 0, .08);
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .74);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-k4d-warn i {
  color: var(--k4d-gold);
  font-size: 18px;
  margin-top: 3px;
}

.footer-k4d-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 20px 0;
}

.footer-k4d-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  flex-wrap: wrap;
}

.footer-k4d-copy a:hover {
  color: var(--k4d-accent);
}

/* ---------- 返回顶部 ---------- */
.totop-k4d {
  position: fixed;
  right: 22px;
  bottom: 26px;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--k4d-primary);
  color: var(--k4d-accent);
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--k4d-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity .35s var(--k4d-ease), transform .35s var(--k4d-ease), visibility .35s;
  z-index: 80;
}

.totop-k4d-show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.totop-k4d:hover {
  background: var(--k4d-accent);
  color: var(--k4d-primary-deep);
}

/* ---------- 列表页 ---------- */
.pagehead-k4d {
  position: relative;
  background:
    radial-gradient(circle at 80% 20%, rgba(38, 208, 168, .24), transparent 55%),
    linear-gradient(140deg, var(--k4d-primary) 0%, var(--k4d-primary-deep) 100%);
  color: var(--k4d-white);
  padding: 78px 0 66px;
  overflow: hidden;
}

.pagehead-k4d-crumb {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .66);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.pagehead-k4d-crumb a:hover {
  color: var(--k4d-accent);
}

.pagehead-k4d-name {
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}

.pagehead-k4d-lead {
  font-size: 16px;
  color: rgba(255, 255, 255, .76);
  max-width: 760px;
  line-height: 1.92;
}

.listing-k4d-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.listing-k4d-pill {
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  font-size: 14px;
  font-weight: 600;
  color: var(--k4d-muted);
  transition: background .3s var(--k4d-ease), color .3s var(--k4d-ease), border-color .3s var(--k4d-ease);
}

.listing-k4d-pill:hover,
.listing-k4d-pill[aria-current="page"] {
  background: var(--k4d-primary);
  border-color: var(--k4d-primary);
  color: var(--k4d-white);
}

.listing-k4d-count {
  margin-left: auto;
  font-size: 14px;
  color: var(--k4d-muted);
}

.listing-k4d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.listing-k4d-card {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .4s var(--k4d-ease), box-shadow .4s var(--k4d-ease);
}

.listing-k4d-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--k4d-shadow);
}

.listing-k4d-media {
  height: 236px;
  overflow: hidden;
}

.listing-k4d-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--k4d-ease);
}

.listing-k4d-card:hover .listing-k4d-media img {
  transform: scale(1.07);
}

.listing-k4d-body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.listing-k4d-tag {
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--k4d-accent-deep);
  background: rgba(38, 208, 168, .12);
}

.listing-k4d-name {
  font-size: 19px;
  font-weight: 800;
  color: var(--k4d-primary);
  line-height: 1.5;
}

.listing-k4d-text {
  font-size: 14.5px;
  color: var(--k4d-muted);
  line-height: 1.85;
  flex: 1;
}

.listing-k4d-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #8994a9;
  flex-wrap: wrap;
}

.listing-k4d-meta i {
  color: var(--k4d-accent-deep);
  margin-right: 5px;
}

.listing-k4d-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--k4d-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.listing-k4d-link i {
  transition: transform .3s var(--k4d-ease);
}

.listing-k4d-link:hover {
  color: var(--k4d-accent-deep);
}

.listing-k4d-link:hover i {
  transform: translateX(5px);
}

/* ---------- 详情页 ---------- */
.reading-k4d-wrap {
  max-width: 880px;
  margin: 0 auto;
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius-lg);
  padding: 44px 46px 48px;
  box-shadow: var(--k4d-shadow-soft);
}

.reading-k4d-crumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--k4d-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.reading-k4d-crumb a:hover {
  color: var(--k4d-accent-deep);
}

.reading-k4d-name {
  font-size: clamp(25px, 3.8vw, 40px);
  font-weight: 800;
  line-height: 1.34;
  color: var(--k4d-primary);
  margin-bottom: 20px;
}

.reading-k4d-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
  color: #8994a9;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--k4d-line);
}

.reading-k4d-meta i {
  color: var(--k4d-accent-deep);
  margin-right: 6px;
}

.reading-k4d-figure {
  margin: 28px 0;
  border-radius: var(--k4d-radius);
  overflow: hidden;
}

.reading-k4d-figure img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.reading-k4d-body {
  font-size: 16px;
  line-height: 2.05;
  color: #2c3852;
}

.reading-k4d-body p {
  margin-bottom: 20px;
}

.reading-k4d-body h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin: 30px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--k4d-accent);
  line-height: 1.5;
}

.reading-k4d-body h3 {
  font-size: 18.5px;
  font-weight: 800;
  color: var(--k4d-primary);
  margin: 24px 0 10px;
}

.reading-k4d-body img {
  border-radius: var(--k4d-radius);
  margin: 18px 0;
}

.reading-k4d-body ul {
  margin: 0 0 20px;
  padding-left: 6px;
}

.reading-k4d-body li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}

.reading-k4d-body li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--k4d-accent);
}

.reading-k4d-note {
  margin: 26px 0;
  padding: 18px 22px;
  border-radius: var(--k4d-radius);
  background: rgba(247, 181, 0, .09);
  border: 1px solid rgba(247, 181, 0, .3);
  color: #6a5210;
  font-size: 14.5px;
  line-height: 1.9;
}

.reading-k4d-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--k4d-line);
}

.reading-k4d-tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(38, 208, 168, .1);
  color: var(--k4d-accent-deep);
  font-size: 13px;
  font-weight: 600;
}

.reading-k4d-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 26px;
}

.reading-k4d-navlink {
  background: var(--k4d-white);
  border: 1px solid var(--k4d-line);
  border-radius: var(--k4d-radius);
  padding: 20px 24px;
  transition: transform .3s var(--k4d-ease), box-shadow .3s var(--k4d-ease), border-color .3s var(--k4d-ease);
}

.reading-k4d-navlink:hover {
  transform: translateY(-4px);
  box-shadow: var(--k4d-shadow-soft);
  border-color: rgba(38, 208, 168, .5);
}

.reading-k4d-navlabel {
  font-size: 13px;
  letter-spacing: .1em;
  color: #8994a9;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.reading-k4d-navlabel i {
  color: var(--k4d-accent-deep);
}

.reading-k4d-navtext {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--k4d-primary);
  line-height: 1.6;
}

.reading-k4d-next {
  text-align: right;
}

.reading-k4d-share {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  font-size: 14px;
  color: var(--k4d-muted);
}

.reading-k4d-share a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(16, 26, 51, .06);
  color: var(--k4d-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .3s var(--k4d-ease), color .3s var(--k4d-ease);
}

.reading-k4d-share a:hover {
  background: var(--k4d-primary);
  color: var(--k4d-accent);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .expertise-k4d-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .showcase-k4d-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .crew-k4d-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .story-k4d-grid,
  .reach-k4d-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .story-k4d-badge {
    right: 12px;
  }

  .edge-k4d-grid,
  .laurels-k4d-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .updates-k4d-grid,
  .listing-k4d-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .journey-k4d-track {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 18px;
  }

  .journey-k4d-track::before {
    display: none;
  }

  .footer-k4d-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 34px;
  }
}

@media (max-width: 900px) {
  .nav-k4d-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-k4d {
    position: absolute;
    left: 20px;
    right: 20px;
    top: calc(100% + 8px);
    background: var(--k4d-white);
    border: 1px solid var(--k4d-line);
    border-radius: var(--k4d-radius);
    box-shadow: var(--k4d-shadow);
    padding: 10px;
    display: none;
  }

  .nav-k4d-open {
    display: block;
  }

  .nav-k4d-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-k4d-link {
    display: block;
    padding: 13px 16px;
    border-radius: 12px;
  }

  .nav-k4d-link::after {
    display: none;
  }

  .nav-k4d-link:hover {
    background: rgba(38, 208, 168, .1);
  }
}

@media (max-width: 768px) {
  .band-k4d {
    padding: 66px 0;
  }

  .hero-k4d {
    min-height: 0;
  }

  .hero-k4d-inner {
    padding: 88px 0 96px;
  }

  .hero-k4d-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px 12px;
  }

  .expertise-k4d-grid,
  .showcase-k4d-grid,
  .updates-k4d-grid,
  .listing-k4d-grid,
  .crew-k4d-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .voices-k4d-grid {
    grid-template-columns: 1fr;
  }

  .reading-k4d-wrap {
    padding: 30px 22px 34px;
  }

  .reading-k4d-figure img {
    height: 280px;
  }

  .reading-k4d-nav {
    grid-template-columns: 1fr;
  }

  .reading-k4d-next {
    text-align: left;
  }

  .topbar-k4d-note {
    display: none;
  }
}

@media (max-width: 560px) {
  .expertise-k4d-grid,
  .showcase-k4d-grid,
  .updates-k4d-grid,
  .listing-k4d-grid,
  .crew-k4d-grid,
  .edge-k4d-grid,
  .laurels-k4d-grid,
  .journey-k4d-track {
    grid-template-columns: 1fr;
  }

  .footer-k4d-grid {
    grid-template-columns: 1fr;
  }

  .hero-k4d-actions .btn {
    width: 100%;
  }

  .story-k4d-frame img {
    height: 300px;
  }

  .story-k4d-badge {
    position: static;
    margin-top: 16px;
    max-width: none;
  }

  .reach-k4d-form {
    padding: 24px 20px;
  }

  .totop-k4d {
    right: 14px;
    bottom: 18px;
  }
}