/*
Theme Name: PHD Degree
Theme URI: https://phdhyson.com
Author: Hyson
Author URI: https://phdhyson.com
Description: 把妹博士学位官方黑红响应式课程销售页主题。
Version: 0.1.0
Requires at least: 6.5
Tested up to: 7.1
Requires PHP: 8.1
Text Domain: phd-degree
*/

:root {
  --black: #050506;
  --black-2: #090a0d;
  --panel: #0f1116;
  --panel-2: #151820;
  --text: #f3efe8;
  --muted: #989ba3;
  --muted-2: #666a73;
  --line: rgba(255, 255, 255, 0.13);
  --line-strong: rgba(255, 255, 255, 0.24);
  --red: #ef1f32;
  --red-bright: #ff3045;
  --red-dark: #8f101e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--black);
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--black);
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: 100;
  inset: 0;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.83' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  content: "";
  pointer-events: none;
}

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

button,
input {
  font: inherit;
}

::selection {
  background: var(--red);
  color: white;
}

.site-header {
  position: absolute;
  z-index: 20;
  top: 0;
  left: 50%;
  width: min(1240px, calc(100% - 48px));
  min-height: 94px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  transform: translateX(-50%);
}

.brand {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand > img {
  width: 49px;
  height: 49px;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(239, 31, 50, 0.18));
}

.brand-copy {
  display: grid;
  gap: 3px;
}

.brand-copy strong {
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.brand-copy small {
  color: #777a82;
  font-size: 7px;
  font-weight: 800;
  letter-spacing: 0.21em;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  color: #a5a8af;
  font-size: 12px;
  font-weight: 700;
}

.desktop-nav a {
  position: relative;
  padding: 8px 0;
  transition: color 180ms ease;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--red);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.desktop-nav a:hover {
  color: white;
}

.desktop-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  justify-self: end;
  display: inline-flex;
  min-height: 45px;
  align-items: center;
  gap: 26px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 0 17px;
  font-size: 12px;
  font-weight: 850;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.nav-cta:hover {
  border-color: var(--red);
  background: var(--red);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  min-height: 940px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(430px, 0.95fr);
  gap: clamp(40px, 7vw, 100px);
  align-items: center;
  overflow: hidden;
  padding: 154px max(24px, calc((100vw - 1240px) / 2)) 88px;
  background:
    radial-gradient(circle at 80% 43%, rgba(239, 31, 50, 0.19), transparent 29%),
    radial-gradient(circle at 15% 90%, rgba(117, 17, 31, 0.12), transparent 32%),
    linear-gradient(135deg, #07080a 0%, #050506 58%, #0d080a 100%);
  isolation: isolate;
}

.hero::after {
  position: absolute;
  z-index: -1;
  right: -8vw;
  bottom: -27vw;
  width: 70vw;
  height: 70vw;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  content: "";
}

.hero-grid {
  position: absolute;
  z-index: -3;
  inset: 0;
  opacity: 0.15;
  background-image: linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: linear-gradient(to bottom, black, transparent 92%);
}

.hero-noise {
  position: absolute;
  z-index: -2;
  top: 0;
  right: 0;
  width: 43%;
  height: 100%;
  background: linear-gradient(125deg, transparent 35%, rgba(239, 31, 50, 0.09));
  clip-path: polygon(31% 0, 100% 0, 100% 100%, 0 100%);
}

.hero-copy {
  position: relative;
  z-index: 3;
  max-width: 720px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 26px;
  color: #b5b8bf;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.eyebrow span {
  color: var(--red-bright);
  text-shadow: 0 0 14px var(--red);
}

.hero h1 {
  margin: 0;
  font-size: clamp(74px, 8.2vw, 132px);
  font-weight: 950;
  line-height: 0.82;
  letter-spacing: -0.09em;
}

.hero h1 span,
.hero h1 em {
  display: block;
}

.hero h1 em {
  margin-top: 12px;
  color: var(--red-bright);
  font-family: Georgia, "Noto Serif SC", serif;
  font-style: italic;
  font-weight: 900;
  letter-spacing: -0.085em;
  text-shadow: 0 18px 60px rgba(239, 31, 50, 0.2);
}

.hero-lead {
  max-width: 680px;
  margin: 40px 0 0;
  color: #aaadb4;
  font-size: 16px;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.button {
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding: 0 24px;
  font-size: 13px;
  font-weight: 900;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

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

.button-primary {
  background: var(--red);
  box-shadow: 8px 8px 0 rgba(255, 255, 255, 0.1);
}

.button-primary:hover {
  background: var(--red-bright);
  box-shadow: 10px 10px 0 rgba(255, 255, 255, 0.13);
}

.button-ghost {
  border: 1px solid var(--line-strong);
  color: #d2d4d8;
}

.button-ghost:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.04);
}

.authorization-note {
  display: flex;
  width: max-content;
  max-width: 100%;
  align-items: center;
  gap: 13px;
  margin-top: 45px;
  border-left: 2px solid var(--red);
  padding: 2px 0 2px 15px;
}

.authorization-note > span {
  display: grid;
  width: 29px;
  height: 29px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 50%;
  color: var(--red-bright);
  font-weight: 950;
}

.authorization-note div {
  display: grid;
  gap: 4px;
}

.authorization-note strong {
  font-size: 12px;
}

.authorization-note small {
  color: #72757d;
  font-size: 9px;
  letter-spacing: 0.05em;
}

.hero-visual {
  position: relative;
  min-height: 640px;
  display: grid;
  place-items: center;
}

.hero-visual > img {
  position: relative;
  z-index: 4;
  width: min(96%, 640px);
  object-fit: contain;
  filter: drop-shadow(0 35px 70px rgba(0, 0, 0, 0.75)) drop-shadow(0 0 28px rgba(239, 31, 50, 0.12));
  animation: logo-float 5s ease-in-out infinite;
}

@keyframes logo-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-11px) rotate(-0.5deg); }
}

.phd-watermark {
  position: absolute;
  z-index: 0;
  top: 50%;
  left: 50%;
  color: rgba(255, 255, 255, 0.035);
  font-size: clamp(180px, 21vw, 350px);
  font-weight: 1000;
  line-height: 0.8;
  letter-spacing: -0.12em;
  transform: translate(-54%, -49%) skewX(-7deg);
}

.degree-orbit {
  position: absolute;
  z-index: 1;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
}

.orbit-one {
  width: 83%;
  aspect-ratio: 1;
}

.orbit-one::before,
.orbit-one::after {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 18px var(--red);
  content: "";
}

.orbit-one::before { top: 15%; left: 12%; }
.orbit-one::after { right: 9%; bottom: 20%; }

.orbit-two {
  width: 61%;
  aspect-ratio: 1;
  border-color: rgba(239, 31, 50, 0.25);
  transform: rotate(18deg);
}

.visual-code {
  position: absolute;
  z-index: 5;
  color: #787b83;
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.code-top { top: 7%; right: 4%; }
.code-bottom { bottom: 8%; left: 1%; }

.hero-seal {
  position: absolute;
  z-index: 6;
  right: -1%;
  bottom: 12%;
  width: 142px;
  height: 142px;
  display: grid;
  place-content: center;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 50%;
  background: rgba(5, 5, 6, 0.78);
  text-align: center;
  backdrop-filter: blur(12px);
  transform: rotate(8deg);
}

.hero-seal::before {
  position: absolute;
  inset: 7px;
  border: 1px dashed var(--red);
  border-radius: 50%;
  content: "";
}

.hero-seal small,
.hero-seal strong {
  position: relative;
  z-index: 2;
  display: block;
}

.hero-seal small {
  color: #878a91;
  font-size: 7px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.hero-seal strong {
  margin-top: 5px;
  color: white;
  font-size: 19px;
}

.proof-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #08090b;
}

.proof-rail > div {
  min-height: 132px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px;
}

.proof-rail strong {
  color: var(--red-bright);
  font-size: clamp(30px, 3.2vw, 48px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.proof-rail span {
  max-width: 110px;
  color: #8e9198;
  font-size: 10px;
  font-weight: 750;
  line-height: 1.55;
}

.section {
  padding: 132px max(24px, calc((100vw - 1180px) / 2));
}

.section-kicker {
  margin: 0 0 24px;
  color: var(--red-bright);
  font-family: ui-monospace, monospace;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.2em;
}

.section-kicker::before {
  display: inline-block;
  width: 24px;
  height: 7px;
  margin-right: 10px;
  background: currentColor;
  content: "";
}

.section-heading,
.pricing-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 7vw;
  align-items: end;
}

.section-heading h2,
.curriculum-intro h2,
.mentor-copy h2,
.path-heading h2,
.pricing-heading h2,
.faq-heading h2,
.closing-copy h2 {
  margin: 0;
  font-size: clamp(45px, 5.8vw, 82px);
  font-weight: 950;
  line-height: 1.03;
  letter-spacing: -0.067em;
}

.section-heading h2 em,
.closing-copy h2 em {
  color: var(--red-bright);
  font-family: Georgia, "Noto Serif SC", serif;
  font-style: italic;
  font-weight: 900;
}

.section-heading > p,
.pricing-heading > p {
  margin: 0 0 5px;
  color: #92959d;
  font-size: 14px;
  line-height: 1.9;
}

.advantages {
  background: linear-gradient(180deg, #0a0b0e 0%, #07080a 100%);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 72px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.advantage-grid article {
  position: relative;
  min-height: 330px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.012);
  padding: 28px;
  transition: background 220ms ease, transform 220ms ease;
}

.advantage-grid article::before {
  position: absolute;
  top: -42px;
  right: -12px;
  color: rgba(255, 255, 255, 0.025);
  content: "PHD";
  font-size: 130px;
  font-weight: 1000;
  letter-spacing: -0.12em;
}

.advantage-grid article:hover {
  z-index: 2;
  background: #14161c;
  transform: translateY(-5px);
}

.card-topline {
  position: absolute;
  top: 25px;
  right: 28px;
  left: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: ui-monospace, monospace;
}

.card-topline span {
  color: var(--red-bright);
  font-size: 11px;
  font-weight: 900;
}

.card-topline small {
  color: #646871;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.advantage-grid h3 {
  margin: 0 0 15px;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.advantage-grid p {
  max-width: 500px;
  margin: 0;
  color: #868991;
  font-size: 13px;
  line-height: 1.8;
}

.advantage-grid i {
  position: absolute;
  right: 26px;
  bottom: 23px;
  color: var(--red);
  font-size: 24px;
  font-style: normal;
  opacity: 0;
  transform: translate(-5px, -5px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.advantage-grid article:hover i {
  opacity: 1;
  transform: translate(0, 0);
}

.authenticity-band {
  position: relative;
  min-height: 330px;
  display: grid;
  grid-template-columns: 0.55fr 1fr 0.65fr;
  gap: 5vw;
  align-items: center;
  overflow: hidden;
  padding: 70px max(24px, calc((100vw - 1180px) / 2));
  background: linear-gradient(110deg, #a31222, var(--red) 58%, #c51528);
}

.authenticity-band::before {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image: linear-gradient(rgba(255, 255, 255, 0.32) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.32) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
}

.authenticity-band > * {
  position: relative;
}

.authenticity-number {
  color: #08090b;
  font-size: clamp(86px, 12vw, 170px);
  font-weight: 1000;
  line-height: 0.8;
  letter-spacing: -0.1em;
  text-shadow: 8px 8px 0 rgba(255, 255, 255, 0.14);
}

.authenticity-band .section-kicker {
  color: white;
  opacity: 0.75;
}

.authenticity-band h2 {
  margin: 0;
  font-size: clamp(32px, 4.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.06em;
}

.authenticity-band > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  line-height: 1.85;
}

.curriculum {
  display: grid;
  grid-template-columns: minmax(300px, 0.68fr) minmax(0, 1.32fr);
  gap: 7vw;
  background: #07080a;
}

.curriculum-intro {
  position: sticky;
  top: 48px;
  align-self: start;
}

.curriculum-intro h2 {
  font-size: clamp(42px, 5vw, 69px);
}

.curriculum-intro > p:not(.section-kicker) {
  margin: 30px 0 0;
  color: #898c94;
  font-size: 14px;
  line-height: 1.9;
}

.module-count {
  display: flex;
  align-items: flex-end;
  gap: 15px;
  margin-top: 52px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.module-count strong {
  color: var(--red-bright);
  font-size: 58px;
  line-height: 0.85;
  letter-spacing: -0.08em;
}

.module-count span {
  color: #666a72;
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0.13em;
}

.module-list {
  border-top: 1px solid var(--line-strong);
}

.module-list article {
  position: relative;
  min-height: 162px;
  display: grid;
  grid-template-columns: 58px 1fr auto;
  gap: 23px;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line-strong);
  padding: 24px 18px 24px 0;
  transition: background 180ms ease, padding 180ms ease;
}

.module-list article::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(239, 31, 50, 0.11), transparent 65%);
  content: "";
  opacity: 0;
  transform: translateX(-30%);
  transition: opacity 180ms ease, transform 240ms ease;
}

.module-list article:hover {
  padding-left: 17px;
}

.module-list article:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.module-number,
.module-copy,
.module-arrow {
  position: relative;
  z-index: 2;
}

.module-number {
  color: var(--red-bright);
  font-family: ui-monospace, monospace;
  font-size: 11px;
  font-weight: 900;
}

.module-copy small {
  color: #5f626a;
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.module-copy h3 {
  margin: 8px 0 8px;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.module-copy p {
  max-width: 650px;
  margin: 0;
  color: #7f828a;
  font-size: 12px;
  line-height: 1.75;
}

.module-arrow {
  color: var(--red);
  font-size: 23px;
}

.mentor {
  display: grid;
  grid-template-columns: minmax(380px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(55px, 8vw, 110px);
  align-items: center;
  background:
    radial-gradient(circle at 12% 60%, rgba(239, 31, 50, 0.13), transparent 31%),
    #0c0d11;
}

.mentor-visual {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: #111319;
  box-shadow: -15px 15px 0 rgba(239, 31, 50, 0.75);
}

.mentor-visual::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 5, 6, 0.08) 35%, rgba(5, 5, 6, 0.82) 100%);
  content: "";
  pointer-events: none;
}

.mentor-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 34%;
  filter: saturate(0.82) contrast(1.08) brightness(0.88);
}

.mentor-grid {
  position: absolute;
  z-index: 2;
  inset: 0;
  opacity: 0.1;
  background-image: linear-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
  background-size: 49px 49px;
}

.mentor-code {
  position: absolute;
  z-index: 3;
  top: 22px;
  left: 23px;
  color: #777a82;
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.mentor-caption {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 46px;
  width: 78%;
  border-left: 8px solid var(--red);
  background: rgba(5, 5, 6, 0.92);
  padding: 20px 25px 23px;
}

.mentor-caption small,
.mentor-caption strong {
  display: block;
}

.mentor-caption small {
  color: #777a82;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.mentor-caption strong {
  margin-top: 2px;
  font-size: clamp(48px, 5vw, 72px);
  letter-spacing: -0.07em;
}

.mentor-copy h2 {
  max-width: 720px;
}

.mentor-statement {
  font-size: clamp(34px, 3.15vw, 52px) !important;
  line-height: 1.14 !important;
  letter-spacing: -0.055em !important;
}

.mentor-statement span {
  display: block;
  white-space: nowrap;
}

.mentor-copy blockquote {
  position: relative;
  max-width: 700px;
  margin: 38px 0 0;
  border-block: 1px solid var(--line-strong);
  padding: 29px 0 29px 36px;
  color: #e9e5de;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(19px, 2vw, 27px);
  font-weight: 700;
  line-height: 1.72;
}

.mentor-copy blockquote::before {
  position: absolute;
  top: 25px;
  left: 0;
  color: var(--red);
  content: "“";
  font-family: Georgia, serif;
  font-size: 48px;
  line-height: 1;
}

.mentor-copy > p:not(.section-kicker) {
  max-width: 690px;
  margin: 24px 0 0;
  color: #8f929a;
  font-size: 13px;
  line-height: 1.9;
}

.mentor-signature {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-top: 32px;
}

.mentor-signature strong {
  color: var(--red-bright);
  font-family: Georgia, serif;
  font-size: 31px;
  font-style: italic;
}

.mentor-signature span {
  margin-bottom: 5px;
  color: #5f626b;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.learning-path {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  gap: 7vw;
  padding: 110px max(24px, calc((100vw - 1180px) / 2));
  border-block: 1px solid var(--line);
  background: #08090b;
}

.path-heading h2 {
  font-size: clamp(44px, 5vw, 68px);
}

.path-heading > p:not(.section-kicker) {
  max-width: 520px;
  margin: 26px 0 0;
  color: #7d8088;
  font-size: 13px;
  line-height: 1.85;
}

.step-list {
  border-top: 1px solid var(--line-strong);
}

.step-list article {
  min-height: 126px;
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 18px;
  align-items: center;
  border-bottom: 1px solid var(--line-strong);
}

.step-list article > span {
  color: var(--red-bright);
  font-family: ui-monospace, monospace;
  font-size: 10px;
  font-weight: 900;
}

.step-list h3 {
  margin: 0 0 7px;
  font-size: 20px;
}

.step-list p {
  margin: 0;
  color: #73767e;
  font-size: 11px;
}

.step-list b {
  color: #4d5058;
  font-size: 23px;
}

.pricing {
  background:
    radial-gradient(circle at 80% 25%, rgba(239, 31, 50, 0.11), transparent 27%),
    #050506;
}

.pricing-heading {
  margin-bottom: 68px;
}

.pricing-heading h2 {
  max-width: 830px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.pricing-notes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.pricing-notes p {
  margin: 0;
  border-left: 2px solid var(--red);
  padding-left: 13px;
  color: #686b73;
  font-size: 9px;
  line-height: 1.7;
}

.pricing-notes p:last-child {
  text-align: right;
  border-right: 2px solid var(--red);
  border-left: 0;
  padding-right: 13px;
  padding-left: 0;
}

.pricing-notes a,
.pricing-notes strong {
  color: #a6a9b0;
}

.plan-card {
  position: relative;
  min-height: 720px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(145deg, #13151b, #0c0d11);
  padding: clamp(30px, 4vw, 52px);
}

.plan-card::before {
  position: absolute;
  right: -28px;
  bottom: -55px;
  color: rgba(255, 255, 255, 0.018);
  content: "PHD";
  font-size: 190px;
  font-weight: 1000;
  line-height: 0.8;
  letter-spacing: -0.13em;
  transform: skewX(-8deg);
}

.plan-card-vip {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), transparent 42%),
    linear-gradient(145deg, #d0172a, #9c0f1d);
}

.plan-card-vip::after {
  position: absolute;
  top: -120px;
  right: -120px;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  content: "";
}

.plan-topline {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.plan-topline > span:first-child {
  color: #777a83;
}

.plan-card-vip .plan-topline > span:first-child {
  color: rgba(255, 255, 255, 0.64);
}

.plan-badge {
  border: 1px solid currentColor;
  padding: 7px 9px;
  font-size: 8px;
}

.plan-card h3 {
  position: relative;
  z-index: 2;
  max-width: 490px;
  min-height: 105px;
  margin: 44px 0 12px;
  font-size: clamp(31px, 3.5vw, 50px);
  line-height: 1.07;
  letter-spacing: -0.055em;
}

.plan-summary {
  position: relative;
  z-index: 2;
  min-height: 47px;
  margin: 0;
  color: #888b93;
  font-size: 12px;
  line-height: 1.7;
}

.plan-card-vip .plan-summary {
  color: rgba(255, 255, 255, 0.7);
}

.plan-price {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: 9px;
  margin: 34px 0 37px;
}

.plan-price .currency {
  margin-bottom: 12px;
  font-size: 21px;
  font-weight: 900;
}

.plan-price > strong {
  font-size: clamp(59px, 6vw, 83px);
  line-height: 0.87;
  letter-spacing: -0.08em;
}

.plan-price > div {
  display: grid;
  gap: 4px;
  margin-bottom: 7px;
}

.plan-price del {
  color: #686b73;
  font-size: 11px;
}

.plan-price small {
  color: var(--red-bright);
  font-size: 9px;
  font-weight: 900;
}

.plan-card-vip .plan-price del,
.plan-card-vip .plan-price small {
  color: rgba(255, 255, 255, 0.68);
}

.plan-card ul {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 14px;
  margin: 0 0 38px;
  padding: 25px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.plan-card-vip ul {
  border-color: rgba(255, 255, 255, 0.25);
}

.plan-card li {
  display: flex;
  gap: 11px;
  color: #b9bbc1;
  font-size: 12px;
  line-height: 1.6;
}

.plan-card-vip li {
  color: rgba(255, 255, 255, 0.86);
}

.plan-card li span {
  color: var(--red-bright);
  font-weight: 950;
}

.plan-card-vip li span {
  color: white;
}

.plan-button {
  position: relative;
  z-index: 3;
  width: 100%;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  border: 1px solid var(--line-strong);
  background: var(--red);
  padding: 0 20px;
  color: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.plan-button:hover {
  background: var(--red-bright);
  box-shadow: 8px 8px 0 rgba(255, 255, 255, 0.11);
  transform: translate(-3px, -3px);
}

.plan-button-light {
  background: #07080a;
  border-color: rgba(255, 255, 255, 0.4);
}

.plan-button-light:hover {
  background: #000;
  box-shadow: 8px 8px 0 rgba(255, 255, 255, 0.23);
}

.checkout-backdrop {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: grid;
  place-items: center;
  overflow-y: auto;
  background: rgba(0, 0, 0, 0.86);
  padding: 24px;
  backdrop-filter: blur(15px);
}

.checkout-dialog {
  position: relative;
  width: min(100%, 620px);
  border: 1px solid var(--line-strong);
  background: #0d0f13;
  box-shadow: 15px 15px 0 var(--red);
  padding: clamp(29px, 5vw, 52px);
}

.checkout-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: white;
  cursor: pointer;
  font-size: 24px;
}

.checkout-kicker {
  margin: 0 0 16px;
  color: var(--red-bright);
  font-family: ui-monospace, monospace;
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.18em;
}

.checkout-dialog h2 {
  max-width: 490px;
  margin: 0;
  padding-right: 25px;
  font-size: clamp(30px, 5vw, 47px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.checkout-order {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-end;
  margin-top: 29px;
  border-block: 1px solid var(--line);
  padding: 18px 0;
}

.checkout-order > span {
  max-width: 340px;
  color: #8b8e96;
  font-size: 11px;
  line-height: 1.6;
}

.checkout-order > div {
  display: grid;
  text-align: right;
}

.checkout-order del {
  color: #60636b;
  font-size: 10px;
}

.checkout-order strong {
  color: var(--red-bright);
  font-size: 30px;
  letter-spacing: -0.05em;
}

.checkout-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 26px 0;
}

.checkout-steps span {
  border-bottom: 2px solid #2e3138;
  padding: 0 4px 10px;
  color: #61646c;
  font-size: 8px;
  font-weight: 850;
}

.checkout-steps span.active {
  border-color: var(--red);
  color: white;
}

.account-access {
  display: grid;
  gap: 18px;
}

.account-access-copy {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
  border: 1px solid #2f3239;
  background: #08090c;
  padding: 18px;
}

.account-access-copy > span {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  background: var(--red);
  color: white;
  font-size: 22px;
  font-weight: 950;
}

.account-access-copy strong {
  display: block;
  color: white;
  font-size: 14px;
  font-weight: 900;
}

.account-access-copy p {
  margin: 7px 0 0;
  color: #858891;
  font-size: 10px;
  line-height: 1.75;
}

.account-access-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.account-access-actions button {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 0;
  background: var(--red);
  padding: 0 18px;
  color: white;
  cursor: pointer;
  font-weight: 900;
}

.account-access-actions .account-register-button {
  border: 1px solid #373a42;
  background: transparent;
  padding: 0 22px;
  color: #d8d9dd;
}

.account-access-actions .account-register-button:hover {
  border-color: #686c75;
  background: #16181d;
}

.checkout-notice {
  margin: 15px 0 0;
  color: #656870;
  font-size: 9px;
  line-height: 1.65;
}

.demo-message {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border: 1px solid var(--line);
  background: #15171d;
  padding: 17px;
}

.demo-message > span {
  width: 28px;
  height: 28px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  background: var(--red);
  font-weight: 950;
}

.demo-message strong {
  font-size: 13px;
}

.demo-message p {
  margin: 7px 0 0;
  color: #858890;
  font-size: 10px;
  line-height: 1.7;
}

.faq {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  gap: 7vw;
  border-top: 1px solid var(--line);
  background: #090a0d;
}

.faq-heading {
  position: sticky;
  top: 50px;
  align-self: start;
}

.faq-heading > p:last-child {
  margin: 27px 0 0;
  color: #72757d;
  font-size: 11px;
}

.faq-heading a {
  color: var(--red-bright);
}

.faq-list {
  border-top: 1px solid var(--line-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--line-strong);
}

.faq-list summary {
  min-height: 94px;
  display: grid;
  grid-template-columns: 35px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 15px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 850;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary span {
  color: var(--red-bright);
  font-family: ui-monospace, monospace;
  font-size: 9px;
}

.faq-list summary b {
  font-size: 23px;
  font-weight: 400;
  transition: transform 180ms ease;
}

.faq-list details[open] summary b {
  transform: rotate(45deg);
}

.faq-list details > p {
  max-width: 720px;
  margin: -4px 34px 30px 49px;
  color: #7d8088;
  font-size: 12px;
  line-height: 1.85;
}

.closing-cta {
  min-height: 660px;
  display: grid;
  grid-template-columns: minmax(350px, 0.85fr) minmax(0, 1.15fr);
  gap: 6vw;
  align-items: center;
  overflow: hidden;
  padding: 100px max(24px, calc((100vw - 1180px) / 2));
  background:
    radial-gradient(circle at 20% 50%, rgba(239, 31, 50, 0.22), transparent 31%),
    linear-gradient(125deg, #07080a, #0b090c 65%, #24070d);
}

.closing-logo {
  position: relative;
  display: grid;
  place-items: center;
}

.closing-logo::before {
  position: absolute;
  width: 86%;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  content: "";
}

.closing-logo img {
  position: relative;
  width: min(100%, 480px);
  filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.65));
}

.closing-copy {
  position: relative;
  z-index: 2;
}

.closing-copy h2 {
  font-size: clamp(56px, 7.4vw, 105px);
  line-height: 0.92;
}

.closing-button {
  margin-top: 42px;
  background: var(--red);
  box-shadow: 8px 8px 0 rgba(255, 255, 255, 0.11);
}

footer {
  display: grid;
  grid-template-columns: 1.1fr 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 45px max(24px, calc((100vw - 1180px) / 2));
  border-top: 1px solid var(--line);
  background: #040405;
}

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

.footer-brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.footer-brand div {
  display: grid;
  gap: 4px;
}

.footer-brand strong {
  font-size: 13px;
  letter-spacing: 0.1em;
}

.footer-brand small {
  color: #5f626a;
  font-size: 7px;
  letter-spacing: 0.18em;
}

footer > p {
  margin: 0;
  color: #686b72;
  font-size: 10px;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 20px;
  color: #9a9ca3;
  font-size: 10px;
}

footer > small {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  color: #4f5259;
  font-size: 8px;
  letter-spacing: 0.07em;
}

.mobile-buy-bar {
  display: none;
}

@media (max-width: 1020px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .desktop-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 50px;
    padding-top: 145px;
  }

  .hero-copy {
    max-width: 820px;
  }

  .hero-visual {
    width: min(100%, 720px);
    justify-self: center;
  }

  .section-heading,
  .pricing-heading,
  .authenticity-band,
  .curriculum,
  .mentor,
  .learning-path,
  .faq,
  .closing-cta {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .pricing-heading {
    gap: 32px;
  }

  .authenticity-band {
    gap: 28px;
  }

  .authenticity-number {
    font-size: 110px;
  }

  .curriculum,
  .mentor,
  .learning-path,
  .faq,
  .closing-cta {
    gap: 62px;
  }

  .curriculum-intro,
  .faq-heading {
    position: static;
  }

  .mentor-visual {
    width: min(100%, 600px);
    justify-self: center;
  }

  .closing-logo {
    width: min(100%, 540px);
    justify-self: center;
  }

  .closing-copy {
    text-align: center;
  }

  .closing-copy .section-kicker::before {
    display: none;
  }
}

@media (max-width: 720px) {
  .site-header {
    width: calc(100% - 36px);
    min-height: 78px;
  }

  .brand > img {
    width: 42px;
    height: 42px;
  }

  .brand-copy strong {
    font-size: 12px;
  }

  .brand-copy small {
    display: none;
  }

  .nav-cta {
    min-height: 40px;
    gap: 11px;
    padding: 0 12px;
    font-size: 10px;
  }

  .hero {
    min-height: 0;
    padding: 118px 20px 62px;
  }

  .eyebrow {
    font-size: 8px;
  }

  .hero h1 {
    font-size: clamp(65px, 21vw, 96px);
  }

  .hero-lead {
    margin-top: 30px;
    font-size: 14px;
    line-height: 1.85;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .authorization-note {
    margin-top: 36px;
  }

  .hero-visual {
    min-height: 450px;
  }

  .hero-visual > img {
    width: 100%;
  }

  .hero-seal {
    right: 1%;
    bottom: 5%;
    width: 112px;
    height: 112px;
  }

  .hero-seal strong {
    font-size: 15px;
  }

  .proof-rail {
    grid-template-columns: repeat(2, 1fr);
  }

  .proof-rail > div {
    min-height: 105px;
    justify-content: flex-start;
    padding: 17px;
  }

  .proof-rail strong {
    font-size: 32px;
  }

  .section {
    padding: 88px 20px;
  }

  .section-heading h2,
  .curriculum-intro h2,
  .mentor-copy h2,
  .path-heading h2,
  .pricing-heading h2,
  .faq-heading h2 {
    font-size: clamp(40px, 12vw, 56px);
  }

  .advantage-grid {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .advantage-grid article {
    min-height: 285px;
  }

  .authenticity-band {
    padding: 74px 20px;
  }

  .authenticity-number {
    font-size: 88px;
  }

  .authenticity-band h2 {
    font-size: 37px;
  }

  .module-count {
    margin-top: 36px;
  }

  .module-list article {
    min-height: 170px;
    grid-template-columns: 42px 1fr;
    gap: 13px;
    padding-right: 0;
  }

  .module-arrow {
    display: none;
  }

  .module-copy h3 {
    font-size: 22px;
  }

  .mentor-visual {
    min-height: 520px;
    box-shadow: -9px 9px 0 rgba(239, 31, 50, 0.75);
  }

  .mentor-copy blockquote {
    padding-left: 29px;
    font-size: 18px;
  }

  .mentor-statement {
    font-size: clamp(23px, 6.7vw, 32px) !important;
    letter-spacing: -0.05em !important;
  }

  .learning-path {
    padding: 84px 20px;
  }

  .step-list article {
    min-height: 115px;
  }

  .pricing-heading {
    margin-bottom: 48px;
  }

  .plan-grid {
    grid-template-columns: 1fr;
  }

  .plan-card {
    min-height: 650px;
    padding: 29px 23px;
  }

  .pricing-notes {
    grid-template-columns: 1fr;
  }

  .pricing-notes p:last-child {
    border-right: 0;
    border-left: 2px solid var(--red);
    padding-right: 0;
    padding-left: 13px;
    text-align: left;
  }

  .plan-card h3 {
    min-height: 0;
    margin-top: 38px;
    font-size: 31px;
  }

  .plan-summary {
    min-height: 0;
  }

  .plan-price > strong {
    font-size: 60px;
  }

  .checkout-backdrop {
    align-items: end;
    padding: 0;
  }

  .checkout-dialog {
    width: 100%;
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: none;
    padding: 34px 21px 24px;
  }

  .checkout-order {
    align-items: flex-start;
    flex-direction: column;
  }

  .checkout-order > div {
    text-align: left;
  }

  .checkout-steps span {
    font-size: 7px;
  }

  .account-access-copy {
    grid-template-columns: 42px 1fr;
    gap: 13px;
    padding: 15px;
  }

  .account-access-copy > span {
    width: 42px;
    height: 42px;
  }

  .account-access-actions {
    grid-template-columns: 1fr;
  }

  .account-access-actions .account-register-button {
    justify-content: center;
  }

  .faq-list summary {
    min-height: 82px;
    grid-template-columns: 27px 1fr auto;
    font-size: 13px;
  }

  .faq-list details > p {
    margin-left: 41px;
    margin-right: 18px;
  }

  .closing-cta {
    min-height: 700px;
    padding: 80px 20px;
  }

  .closing-copy h2 {
    font-size: clamp(52px, 16vw, 76px);
  }

  footer {
    grid-template-columns: 1fr;
    padding: 43px 20px 105px;
  }

  footer > p {
    text-align: left;
  }

  .footer-links {
    justify-content: space-between;
  }

  .mobile-buy-bar {
    position: fixed;
    z-index: 80;
    right: 0;
    bottom: 0;
    left: 0;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--line-strong);
    background: rgba(5, 5, 6, 0.94);
    padding: 9px 14px 9px 18px;
    backdrop-filter: blur(14px);
  }

  .mobile-buy-bar span {
    display: grid;
    gap: 1px;
  }

  .mobile-buy-bar small {
    color: #73767e;
    font-size: 8px;
  }

  .mobile-buy-bar strong {
    color: var(--red-bright);
    font-size: 18px;
  }

  .mobile-buy-bar b {
    background: var(--red);
    padding: 12px 14px;
    font-size: 10px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body.admin-bar .site-header {
  top: 32px;
}

.checkout-backdrop[hidden] {
  display: none;
}

body.phd-checkout-open {
  overflow: hidden;
}

.phd-generic {
  min-height: 70vh;
  padding: 150px max(24px, calc((100vw - 980px) / 2)) 90px;
  background: #08090b;
}

.phd-generic h1 {
  margin: 0 0 32px;
  font-size: clamp(42px, 7vw, 78px);
  letter-spacing: -0.06em;
}

.phd-generic article {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 28px;
}

.phd-generic a {
  color: var(--red-bright);
}

@media (max-width: 782px) {
  body.admin-bar .site-header {
    top: 46px;
  }
}